®
®
PA
Quick Start Guide
Three-Way Setup
An illustrated guide to setting up your DriveRack® PA
using three amplifiers (high, mid, and low).
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 
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 
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 
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 
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  
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
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   
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



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
  


  

  

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

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
  

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
  



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  

 
 


  


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  

  

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

  


  






  


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



  



  

   



  



  

  





  


  






  







  


  

  














 













 
   

 










  

 


  





 













  



 


 



  





  




 








 






















 

















 







  

  


  

 




 

 

  






   







 

 


  

 




 






 



 



 

 

  






   

®
®
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Complete Equalization & Loudspeaker Control System
PA
Featuring
Custom Tunings
User Manual
IMPORTANT SAFETY INSTRUCTIONS
WARNING FOR YOUR PROTECTION
PLEASE READ THE FOLLOWING:
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
KEEP THESE INSTRUCTIONS
A T T E N T I O N : RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR
W A R N I N G : TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
The symbols shown above are internationally accepted symbols that warn of potential hazards with
electrical products. The lightning flash with arrowpoint in an equilateral triangle means that there
are dangerous voltages present within the unit. The exclamation point in an equilateral triangle indicates that it is necessary for the user to refer to the owner’s manual.
These symbols warn that there are no user serviceable parts inside the unit. Do not open the unit.
Do not attempt to service the unit yourself. Refer all servicing to qualified personnel. Opening the
chassis for any reason will void the manufacturer’s warranty. Do not get the unit wet. If liquid is
spilled on the unit, shut it off immediately and take it to a dealer for service. Disconnect the unit during storms to prevent damage.
HEED ALL WARNINGS
FOLLOW ALL INSTRUCTIONS
THE APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING LIQUID AND NO OBJECT
FILLED WITH LIQUID, SUCH AS VASES, SHALL BE PLACED ON THE APPARATUS.
CLEAN ONLY WITH A DRY CLOTH.
DO NOT BLOCK ANY OF THE VENTILATION OPENINGS. INSTALL IN ACCORDANCE WITH THE
MANUFACTURER’S INSTRUCTIONS.
DO NOT INSTALL NEAR ANY HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTERS, STOVES,
OR OTHER APPARATUS (INCLUDING AMPLIFIERS) THAT PRODUCE HEAT.
ONLY USE ATTACHMENTS/ACCESSORIES SPECIFIED BY THE MANUFACTURER.
UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME.
SAFETY INSTRUCTIONS
Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug
has two blades with one wider than the other. A grounding type plug has two blades and
a third grounding prong. The wide blade or third prong are provided for your safety. If
the provided plug does not fit your outlet, consult an electrician for replacement of the
obsolete outlet.
NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER CORD.
WARNING: THIS APPLIANCE MUST BE EARTHED.
The cores in the mains lead are coloured in accordance with the following code:
GREEN and YELLOW - Earth
BLUE - Neutral
BROWN - Live
As colours of the cores in the mains lead of this appliance may not correspond with the coloured markings
identifying the terminals in your plug, proceed as follows:
• The core which is coloured green and yellow must be connected to the terminal in the plug
marked with the letter E, or with the earth symbol, or coloured green, or green and yellow.
• The core which is coloured blue must be connected to the terminal marked N or coloured black.
• The core which is coloured brown must be connected to the terminal marked L or coloured red.
This equipment may require the use of a different line cord, attachment plug, or both, depending on the
available power source at installation. If the attachment plug needs to be changed, refer servicing to qualified service personnel who should refer to the table below. The green/yellow wire shall be connected
directly to the units chassis.
CONDUCTOR
Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
Use only with the cart stand, tripod bracket, or table specified by the manufacture, or sold
with the apparatus. When a cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
Refer all servicing to to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has been dropped.
WIRE COLOR
Normal
Alt
L
LIVE
BROWN
BLACK
N
NEUTRAL
BLUE
WHITE
E EARTH GND GREEN/YEL
GREEN
WARNING: If the ground is defeated, certain fault conditions in the unit or in the system to which it is connected can result in full line voltage between chassis and earth ground. Severe injury or death can then
result if the chassis and earth ground are touched simultaneously.
POWER ON/OFF SWITCH: The Power switch used in this piece of equipment DOES NOT break
the connection from the mains.
MAINS DISCONNECT: The plug shall remain readily operable. For rack-mount or installation where plug is not accessible, an all-pole mains switch with a contact separation of at
least 3 mm in each pole shall be incorporated into the electrical installation of the rack or
building.
FOR UNITS EQUIPPED WITH EXTERNALLY ACCESSIBLE FUSE RECEPTACLE: Replace fuse with
same type and rating only.
MULTIPLE-INPUT VOLTAGE: This equipment may require the use of a different line cord,
attachment plug, or both, depending on the available power source at installation. Connect
this equipment only to the power source indicated on the equipment rear panel. To reduce
the risk of fire or electric shock, refer servicing to qualified service personnel or equivalent.
This Equipment is intended for rack mount use only.
IMPORTANT SAFETY INSTRUCTIONS
LITHIUM BATTERY
WARNING
CAUTION!
This product may contain a lithium battery.There is danger of
explosion if the battery is incorrectly replaced. Replace only
with an Eveready CR 2032 or equivalent. Make sure the battery is installed with the correct polarity. Discard used batteries according to manufacturer’s instructions.
ADVARSEL!
Lithiumbatteri - Eksplosjonsfare.Ved utskifting benyttes kun
batteri som anbefalt av apparatfabrikanten. Brukt batteri
returneres apparatleverandøren.
U.K. MAINS PLUG WARNING
A molded mains plug that has been cut off from the cord is unsafe. Discard the
mains plug at a suitable disposal facility. NEVER UNDER ANY CIRCUMSTANCES
SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG INTO A 13 AMP
POWER SOCKET. Do not use the mains plug without the fuse cover in place.
Replacement fuse covers can be obtained from your local retailer. Replacement
fuses are 13 amps and MUST be ASTA approved to BS1362.
DECLARATION OF
CONFORMITY
ADVARSEL!
Manufacturer’s Name:
dbx Professional Products
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri av samme fabrikat og
type. Levér det brugte batteri tilbage til leverandøren.
Manufacturer’s Address:
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
VAROITUS!
Paristo voi räjähtää, jos se on virheellisesti asennettu.Vaihda
paristo ainoastaan laitevalmistajan suosittelemaan tyyppin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
VARNING!
Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt fabrikantens instruktion.
ELECTROMAGNETIC
COMPATIBILITY
This unit conforms to the Product
Specifications noted on the Declaration of
Conformity. Operation is subject to the following two conditions:
• this device may not cause harmful interference, and
• this device must accept any interference
received, including interference that may
cause undesired operation.
Operation of this unit within significant electromagnetic fields should be avoided.
• use only shielded interconnecting cables.
declares that the product:
Product name:
dbx DriveRack PA
Note: Product name may be suffixed by the EU.
Product option:
None
conforms to the following Product Specifications:
Safety:
IEC 60065 (1998)
EMC:
EN 55013 (1990)
EN 55020 (1991)
Supplementary Information:
The product herewith complies with the requirements of the
Low Voltage Directive 72/23/EEC and the EMC Directive
89/336/EEC as amended by Directive 93/68/EEC.
Vice-President of Engineering
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
Date: April 19,2002
European Contact: Your local dbx Sales and Service Office or
Harman Music Group
8760 South Sandy Parkway
Sandy, Utah 84070 USA
Ph: (801) 566-8800
Fax: (801) 568-7583
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DriveRack PA
Table of Contents
Introduction
Section 5 - Application Guide
0.1 Defining the DriveRack® PA .........................ii
0.2 Service Contact Info........................................iii
0.3 Warranty...........................................................iv
5.1
5.2
5.3
5.4
2X6 Crossover.................................................30
2X5 Crossover.................................................31
2X4 Crossover.................................................32
2X3 Crossover.................................................33
Section 1 - Getting Started
1.1 Rear Panel ......................................................2
1.2 Front Panel .....................................................2
Appendix
1.3 Quick Start .....................................................3
A.2 Quick Key Options........................................36
A.1 Factory Reset .................................................36
A.3 Specifications..................................................37
Section 2 - Editing Functions
2.1
2.2
2.3
2.4
2.5
2.6
Basic Navigation Modes.................................12
Button Array Overview ..................................12
Navigating the EQ Section (GEQ/PEQ)........14
Navigating the Subharmonic Synthesizer Section....14
Navigating the Crossover Section..................14
Navigating the Feedback Suppression Section ..15
A.4
A.5
A.6
A.7
A.8
Auto EQ Optimization Tips ..........................37
Crossover Diagrams .......................................38
Block Diagram ...............................................39
Prog List/Speaker Tunings/Amp Tunings ....40
System Setup and Gain Structure .................41
2.7 Navigating the Comp/Limiter Section ...........15
2.8 Navigating the Speaker Alignment Delay
Section..................................................................15
2.9 Navigating the Utility Section ........................16
2.10 Navigating the Wizard Section ....................16
Section 3 - Operating the
DriveRack PA
3.1 Program Definition.........................................18
3.2 Navigating Factory Programs.........................18
3.3 Editing Factory Programs...............................18
Section 4 - Detailed Parameters
4.1
4.2
4.3
4.4
4.5
4.6
Pre-Crossover Graphic EQ.............................22
Advanced Feedback Suppressor ...................22
Subharmonic Synthesizer...............................23
Crossover ........................................................24
Post-Crossover Parametric EQ .......................25
Compressor/Limiter ........................................25
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4.7 Speaker Alignment Delay .............................27
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Table of Contents
DriveRack® User Manual
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DriveRack PA
INTRODUCTION
INTRO
CUSTOMER SERVICE INFO
Defining the DriveRack
WARRANTY INFO
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Introduction
INTRODUCTION
DriveRack PA
Drive your PA to a whole new level of performance with the DriveRack® PA Complete
Equalization & Loudspeaker Control System. The DriveRack PA from dbx Professional Products
represents a complete integration of the key elements that help ensure optimal loudspeaker system management in PA-specific applications. Capitalizing on the legendary 480 DriveRack technology, the DriveRack PA is able to provide its user with top-tier, pro-level loudspeaker management specifications, yet still remain appealing to the budget-conscious audiophile who
requires a tried and true utilitarian workhorse. With its all-inclusive, no-compromise design, the
DriveRack PA has been systematically developed and designed to grow with your system needs
for years to come.
0.1 Defining the DriveRack® PA
The dbx DriveRack® PA is the most effective way to manage all aspects of Loudspeaker management for Public Address system applications. The DriveRack PA essentially becomes the only
device that you will need between the mixer and the power amps. The following are just some
of the features of the DriveRack® PA.
DriveRack® PA features:
• Stereo Feedback Elimination with 12 feedback notch filters
• Dual 28-band Graphic EQ
• Classic dbx® Compressor
• 120A Sub-harmonic Synthesizer
• 2x3, 2x4, 2x5, 2x6 Crossover Configurations
• Stereo Multi-band Parametric EQ
• Stereo Output Limiters
• Alignment Delay
• Pink Noise Generator
• Auto-EQ with 28-Band RTA
• JBL® Speaker and Crown® Power Amp Tunings with Setup Wizard
• 25 User Programs / 25 Factory Programs
• 2 Channel XLR Input and 6 Channel XLR Output
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• Front panel RTA-M XLR input with phantom power
• 24-Bit ADC/24-Bit DAC, >110 dB Dynamic Range
• TypeIV® Conversion System
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• Full Graphic LCD Display
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DriveRack® PA User Manual
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DriveRack PA
Introduction
By including every form of processing necessary to drive the signal from the mixer to the power
amp, the DriveRack® PA allows you to eliminate all other processing devices normally found in
large and cumbersome traditional drive rack systems of the past.
The DriveRack® PA Loud Speaker Management System includes two balanced XLR inputs, as
well as six balanced XLR output connectors.
0.2 Service Contact Info
If you require technical support, contact dbx Customer Service. Be prepared to accurately
describe the problem. Know the serial number of your unit - this is printed on a sticker attached
to the top panel. If you have not already taken the time to fill out your warranty registration
card and send it in, please do so now.
Before you return a product to the factory for service, we recommend you refer to the manual. Make sure you have correctly followed installation steps and operation procedures. If you
are still unable to solve a problem, contact our Customer Service Department at (801) 568-7660
for consultation. If you need to return a product to the factory for service, you MUST contact
Customer Service to obtain a Return Authorization Number.
No returned products will be accepted at the factory without a Return Authorization Number.
Please refer to the Warranty information on the following page, which extends to the first enduser. After expiration of the warranty, a reasonable charge will be made for parts, labor, and
packing if you choose to use the factory service facility. In all cases, you are responsible for
transportation charges to the factory. dbx will pay return shipping if the unit is still under warranty.
Use the original packing material if it is available. Mark the package with the name of the shipper and with these words in red: DELICATE INSTRUMENT, FRAGILE! Insure the package properly. Ship prepaid, not collect. Do not ship parcel post.
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DriveRack® PA User Manual
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Introduction
DriveRack PA
0.3 Warranty
This warranty is valid only for the original purchaser and only in the United States.
1. The warranty registration card that accompanies this product must be mailed within 30 days
after purchase date to validate this warranty. Proof-of-purchase is considered to be the burden of the consumer.
2. dbx warrants this product, when bought and used solely within the U.S., to be free from
defects in materials and workmanship under normal use and service.
3. dbx liability under this warranty is limited to repairing or, at our discretion, replacing defective materials that show evidence of defect, provided the product is returned to dbx WITH
RETURN AUTHORIZATION from the factory, where all parts and labor will be covered up to
a period of two years. A Return Authorization number must be obtained from dbx by telephone. The company shall not be liable for any consequential damage as a result of the product's use in any circuit or assembly.
4. dbx reserves the right to make changes in design or make additions to or improvements upon
this product without incurring any obligation to install the same additions or improvements
on products previously manufactured.
5. The foregoing is in lieu of all other warranties, expressed or implied, and dbx neither assumes
nor authorizes any person to assume on its behalf any obligation or liability in connection
with the sale of this product. In no event shall dbx or its dealers be liable for special or consequential damages or from any delay in the performance of this warranty due to causes
beyond their control.
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DriveRack® PA User Manual
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DriveRack PA
Section 1
Getting Started
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Section 1
Getting Started
DriveRack PA
1.1 Rear Panel Connections
Left/Mono
Left/Mono
IEC Power Cord Receptacle
The DriveRack® PA comes with a power supply that will accept voltages ranging from 100V120V at frequencies from 50Hz-60Hz. An IEC cord is included. EU version accepts 220V-240V
at frequencies from 50Hz-60Hz.
Outputs 1-6
The output section of the DriveRack® PA offers six electronically balanced XLR connectors.
Inputs 1-2
The input section of the DriveRack® PA offers two electronically balanced XLR connectors.
+4/-10dBv Switch
This switch changes the level from either +4 or -10dBv.
Ground Lift Switch
The ground lift switch lifts the pin 1 chassis ground of both input XLR connectors.
1.2 Front Panel
CROSSOVER/ALIGNMENT DELAY/GRAPHIC EQ/PARAMETRIC EQ/AUTO/EQ
RTA Input Jack
This balanced XLR input is used for the connection of an RTA microphone, which allows the
user to “Pink” and optimize the EQ settings of any room through the use of the Auto EQ in the
Wizard setup assistant.
RTA MIC Input Selector
Pressing the RTA MIC input button will engage the front panel RTA input XLR connector.
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Data Wheel
The Data wheel of the DriveRack® PA is used to scroll through the program menu, load programs, select parameters and edit parameter values.
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DriveRack® PA User Manual
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DriveRack PA
Getting Started
Section 1
LCD Display
The backlit LCD display of the DriveRack® PA provides the user with all of the vital processing
information of the DriveRack® PA including: signal routing, effect block editing and Wizard
Setup functions. The display will also notify the user if any internal clipping is taking place
within the unit. The following message will appear: CLIP.
Function Buttons
The function buttons of the DriveRack® PA allow direct access to all editing and navigating functions of the DriveRack® PA. The functions of the aforementioned buttons are as follows:
<PREV PG> - is used to navigate back through the various pages of any module block.
<NEXT PG> - is used to navigate forward through the various pages of any module block.
<EQ> - is used to move to the EQ modules. Successive presses will move you through the
EQ modules in the input section and through EQ modules located in the output section.
<SUBHARMONIC> - This button is used to move to the Subharmonic Synthesizer module.
<XOVER> - is used to move to the Crossover module.
<FEEDBACK> - is used to move to the feedback elimination module.
<COMP/LIMITER> - is used to move to the Compressor or Limiter modules.
<DELAY> - is used to move to the Delay module.
<PROGRAM> - is used to enter program mode when pressed.
<UTILITY> - is used to access the the Utility menu.
<STORE> - is used to store any program changes.
<WIZARD> - is used to enter the Wizard section which includes: SYSTEM SETUP, AUTO EQ
WIZARD and AFS WIZARD.
Input Meters
The DriveRack® PA provides the user with two independent six segment LightpipeTM input
meters that range from -30 to +20 dBu. These meters monitor the signal level right after the
input module.
Threshold Meters
The threshold meters indicate that the threshold level has been exceeded within the Limiter section, and gain reduction may be taking place within the specific output channel.
Output Meters
The DriveRack® PA provides the user with six independent six-segment Lightpipe™ output
meters that range from -30 to +20 dBu.
Power Switch
The Power Switch turns the DriveRack® PA on and off. Note: dbx Professional Products strongly recommends that power amplifiers connected to the DriveRack® PA, should be powered
down prior to cycling the power on the DriveRack® PA.
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1.3 Quick Start
For those of you that wish to jump right in, the following information has been provided to
act as a quick start guide for optimizing performance of the DriveRack® PA.
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DriveRack® PA User Manual
3
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Section 1
DriveRack PA
Getting Started
Signal Path Block Diagram
The following diagram shows the logical and intuitive signal path of the input, effect modules, and output of the DriveRack® PA.
Meters
Outputs
Meters
3-Band PEQ
Peak Stop Limiter
Alignment Delay
2-Band PEQ
Peak Stop Limiter
Alignment Delay
2-Band PEQ
Peak Stop Limiter
Alignment Delay
Crossover Section - (2X3, 4,5,6)
Stereo Compressor
SubHarmonic Synth
GEQ
RTA
Micr Pre amp
Mic Input
GEQ
AFS Notch Filters
Right Input
Stereo/Mono
Pink Noise
Left Input
Left High
Right High
Left Mid
Right Mid
Left Low
Right Low
Connections
• When setting up the DriveRack® PA, make connections as follows:
• Always make connections prior to applying power to the unit.
• Connect the output from the sending device (mixer) to either of the two XLR
inputs connectors shown below.
• Make output connections from any one of the six output XLR connectors shown
below to the input of the selected power amps.
Left/Mono
Left/Mono
• If you will be “pinking” the room through the use of the RTA, connect the selected
RTA microphone to the front-panel XLR input, and press the RTA input button.
• IMPORTANT- It is imperative that the power amps are turned off prior to cycling power to the Driverack® PA.
Always make sure that your power amps are the last item turned on and the first turned off.
Once all of the connections have been made and the unit is powered up, you can
navigate through the entire signal path of the DriveRack PA from the front panel of
the unit. The display provides you with a clear and concise overview of each aspect
of the signal path from the input to the output section.
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CROSSOVER/ALIGNMENT DELAY/GRAPHIC EQ/PARAMETRIC EQ/AUTO/EQ
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The features of the front panel of the DriveRack® PA are as follows from left to right.
RTA MIC Input- This XLR input is used for the connection of a RTA microphone.
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DriveRack® PA User Manual
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DriveRack PA
Getting Started
Section 1
The RTA MIC input button is used to engage the RTA input connector. LCD DisplayAll operational information of the DriveRack® PA is displayed here. The display will
also notify the user if any internal clipping is taking place within the unit. The following message will appear: CLIP. Data Wheel - The data wheel is used to scroll through
the program menu of the DriveRack® PA. The Data Wheel is also used to perform editing functions to effects and utility menu features. Button Array - Operational editing is
done using this 12 button array. A complete description of each button’s functionality is
listed below. Input meters- These two 6-segment LED meters monitor the input level
of the DriveRack® PA directly after the input mixer. Output meters - These six 6-segment meters monitor the output levels of the DriveRack® PA directly after the output
gain stage. Threshold meters - These six 1-segment meters (when lit) show that
threshold level of the limiters has been exceeded.
U 1
St Tri-Amp
DriveRack PA Wizard
Now that you have made all of your audio connections and have made yourself familiar with
the front-panel navigation of the unit, you can easily optimize your system through the use of
the DriveRack® PA Wizard setup system. This feature of the DriveRack® PA allows for quick
and hyper-accurate venue setups. The menu section of the Wizard offers System setup, Auto
1
EQ and AFS (Advanced Feedback Suppression). The Ufollowing
will walk you through your
St Tri-Amp
venue setup.
• From program mode, press the <WIZARD> button and the display will appear as
follows:
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS WIZARD
Input Setup
Select Input as MONO
or STEREO.
>STEREO
Graphic EQ Setu
Select GEQ as D
Mono or Stereo
>Dual Mono
System Setup
• The arrow will indicate the selected Wizard setup. To select any one of the three
Autosetup,
EQ press
DriveRack
WIZARD the System
options, rotate the <DATA> wheel.
If you arePA
performing
Connect mic to RTA
System Setup
either the <NEXT PG> button or Auto
the <DATA>
wheel and the display
willPress
appearRTA
as
EQ WIZARD
input.
input button.
AFS WIZARD
follows:
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DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS WIZARD
Graphic EQ Setup
Input Setup
Select Input as MONO
Select GEQ as Dual
or STEREO.PA WIZARD
Mono or Stereo
DriveRack
AFS
>Dual Mono
>STEREO
System Setup
Please
turn down the
Auto EQ WIZARD
mixer gain. Press
• Simply rotate the <DATA> wheel to
select
either a Mono or StereoNEXT
input
AFS
WIZARD
PG configurawhen done.
tion. Once you have selected your input option, press the <NEXT PG> button and
Auto EQ Warning
DriveRack
PA appear
WIZARDas follows:Auto EQ
the
display will
Connect mic to RTA
System Setup
Auto EQ WIZARD
RTA INPUT button
input. Press RTA
input button.
must be pressed.
AFS WIZARD
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Auto EQ
Warni
RTA INPUT butt
must be pressed
Main Speaker
Select Main PA
JBL SRX
AFS
>SR4702X
Passi
Select
Number
o
fixed filters.
F F F F F F L L L
Auto EQ : Pink
Mic Level
Turn Up Level
Pink Level >
®
DriveRack® PA User Manual
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS
Please turn down the
mixer gain. Press
AFS
Select Number of
fixed filters. > 6
5
AFS
Select fixed ty
> Speech
U 1
St Tri-Amp
Section 1
Rack PA WIZARD
em Setup
EQ WIZARD
WIZARD
Rack PA WIZARD
em Setup
EQ WIZARD
WIZARD
Setup
Input as MONO
REO.
O
Rack
PA WIZARD
em Setup
EQ WIZARD
WIZARD
Q
t mic to RTA
Press RTA
button.
EQ Setup
EQ as Dual
Stereo
no
turn down the
gain. Press
when done.
Warning
T button
pressed.
eaker
Main PA
X
X Passive
umber of
lters. > 6
F L L L L L L
: Pink Noise
el
Level
vel > 18dB
peaker
t Sub PA
ixed type
®
Getting Started
Graphic EQ Setup
Select GEQ as Dual
Mono or Stereo
>Dual Mono
Input Setup
Select Input as MONO
or STEREO.
>STEREO
DriveRack PA
Sub Speaker
Select Sub P
Main Speaker
Select Main PA
JBL SRX
>SR4702X Passive
>None
• Simply rotate the <DATA> wheel to select either a Dual Mono or Stereo linked 28-band
Graphic EQ. Once you have selected your EQ option, press the <NEXT PG> button and
LR
Auto EQthe display will appear as
Auto
EQ Warning
Auto EQ : Pink Noise
follows:
Connect mic to RTA
Mic Level
RTA INPUT button
input. Press RTA
Turn Up Level
input
button.
must
be
pressed.
Pink
Level > 18dB
Auto Amplifie
EQ
Graphic EQ Setup
Main Speaker
Sub Speaker
High
Select GEQ as Dual
Select Main PA
Select Sub PA
Select an amp
Mono or Stereo
JBL SRX
>Dual
Mono
>SR4702X
Passive
>None
>Crwn
MacroTe
AFS
AFS
Slowly
Incr
AFS
Please turn down the
Select fixed type
mixer gain
Select Number of
• gain.
Rotate Press
the <Data> wheelfixed
to select
any one >
of 6the numerous
custom-tuned MAIN speaker
mixer
> Speech
desired lev
filters.
available. If the speaker
F F F F F F
NEXT PG options
when done.
F F F F being
F F L used
L L LisLnot
L specified in the menu, select CUSTOM.
EQ : speaker
Pink Noise
Auto EQ Once
Warning
L R <NEXT PG> button and the Auto EQ : P
you have selected Auto
your Main
option, press the
Mic Level
Mic Level
display
will appear as follows:
Turn Up Level
Turn Up Lev
RTA INPUT
button
Pink Level > 18dB
must be pressed.
Pink Level
Auto EQ
Sub Speaker
High Amplifier
High Amplifier
Main Speaker
Select an amplifier
Select Sensitiv
Select Sub PA
Select Main PA
Crwn MacroTech
JBL
AFS SRX
AFS
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Slowly Increase the
>None
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Select Number
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Select fixed type
mixer
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fixed filters. > 6
> Speech
Done
desired level.
wheel to select any one of the numerous Fcustom-tuned
F F F F F L LSUB
L Lspeaker
L L
F F F F F F
F F F•
F FRotate
F L Lthe
L L<Data>
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options available. Once you have selected your SUB speaker option, press the <NEXT PG>
A
Auto EQ : Pink Noise
R appear as follows:
Auto EQ :button
Pink and
Noise
the display Lwill
uE
Mic Level
Mic Level
tQ
Turn Up Level
Turn Up Level
o
Pink
Level > 18dB
Pink
> 18dB
RESPONSE
C PRECI
Auto EQ
Sub Level
Speaker
High
Amp Level
High
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High
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Select Sub PA
Adjust level
Select Sensitivity
Select an amplifier
same as your amp
Crwn MacroTech 1202
>None
>25
>0.775 Volts
>Crwn MacroTech 1202
AFS
AFS
Slowly Increase the
Select fixed
Fixed
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to
• You type
are now prompted to
selectgain
a power
<DATA>
wheel
to select any
> Speech
Done
desired
level. amp by rotating the
one of the numerous custom-tuned
Amplifier
options
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Note
that
the
top
line of the
F F F F F F L L L L L L
F F F F F F L L L L L L
A
AutoMid
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LR
selected
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selecdisplay will either read High,
uE
Mic Level
Q
t
tions. Once you have selected
Amp tuning option (depending
on the amp type), you
Turn your
Up Level
o
Pink Level
> 18dB
sensitivity
setting if applicable.
RESPONSE C PRECISION LOW
Auto EQ will select the specified amplifier
High Amplifier
Slowly
the
Select Increase
an amplifier
mixer gain to
desired
level. 1202
>Crwn MacroTech
High Amplifier
AFS Sensitivity
Select
Fixed
Filter 1202
Setup
Crwn
MacroTech
Done Volts
>0.775
F F F F F F L L L L L L
F F F F F F L L L L L L
High Amp Level
Adjust level
same as your amp
>25
Low Amp Bridgi
Select
same as your a
>Normal
®
• Rotate the <DATA> wheel to select the amplifier manufacturer’s specified amplifier sensitivity
A <NEXT PG> button, and you will now be given the option of
Auto EQ
: Pink
setting.
OnceNoise
set, press the
uE
Mic Level
t Q with the DriveRack PA. The page will appear something like this:
optimizing
Turn Up
Level your amp levels
o
Pink Level > 18dB
RESPONSE C PRECISION LOW
Q
Amplifier
ct an amplifier
y Increase the
n gain
MacroTech
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to
ed level.
F F F L L L L L L
o EQ : Pink Noise
6
Level
n Up Level
k Level > 18dB
High Amplifier
Select Sensitivity
Crwn
AFSMacroTech 1202
>0.775
FixedVolts
Filter Setup
Done
High Amp Level
Adjust level
same as your amp
>25
Low Amp Bridging
Select
same as your amp
>Normal
F F F F F F L L L L L L
A
® PA User Manual
DriveRack
uE
tQ
o
RESPONSE
C PRECISION
LOW
®
®
®
DriveRack PA
Section 1
• You will now rotate the <DATA> wheel to match the same setting as your amplifier
of choice. Note that based on your amp selection, the DriveRack® PA will initially
display the recommended setting of that particular amp for obtaining maximum
headroom. This is done to match unity gain from the DriveRack® PA and your amplifier. Note that if Sub Speakers are included in the speaker selection, you will be
asked if the sub woofer is bridged or mono. For more information regarding
Amplifier gain settings, please refer to the System Setup and Gain Structure information located in the appendix section.
• Once you have completed your amp level settings, you will press the <NEXT PG>
button, where you will be asked to select a bridged or normal setting fro your low
amp (if used). The display will appear as follows:
plifier
Sensitivity
croTech 1202
Volts
E
Getting Started
C PRECISION
High Amp Level
Adjust level
same as your amp
>25
LOW
Low Amp Bridging
Select
same as your amp
>Normal
U 1
St Tri-Amp
• Once have made a bridged or mono selection, press the <NEXT PG> where the
unit will prompt <DATA> wheel to load your new settings. If you do not wish to
load the settings either press the <PROGRAM> button or use the <PREV PG> button to re-edit your settings, By using your selections, the DriveRack® will automatically generate a new program and speaker selection which are used to choose the
correct crossover type, parameters, speaker compensation EQ and delay are also
U 1
adjusted by the speaker selection. Amplifier
Stparameters
Tri-Amp are used to set the limiters
to stop amplifier clipping and balance out the crossover levels. You may find that
you want to re-adjust the crossover levels based on your taste and type of music.
Auto EQ WIZARD
• Once you have custom-tailored your system setup, you can now proceed to EQ your
Setup
DriveRack
PA WIZARD
system.The Auto EQ Wizard automatically
adjusts
the response of Input
the system
by proSelect
Input as MONO
System
Setup
ducing pink noise and adjusting the
Graphic
EQ
until
the
RTA
matches
a
selected
or STEREO.
Auto EQ WIZARD
Wizard
menu, rotate the <DATA>
wheel until
response. From the DriveRack® PA
>STEREO
AFS
WIZARD
the display appears as follows:
Auto EQ
DriveRack PA WIZARD
Connect mic to RTA
System Setup
input.
RTA
Auto EQ
WIZARD
GraphicPress
EQ Setup
Input
Setup
DriveRack PA WIZARD
input
AFS WIZARD
Selectbutton.
GEQ as Dual
Select
Input as MONO
System Setup
Mono or Stereo
or STEREO.
Auto EQ WIZARD
>Dual Mono
>STEREO
AFS WIZARD
• Either press the <NEXT PG> button or rotate the <DATA> wheel and the display
DriveRack PA WIZARD
AFS
will read:
System Setup
Please turn down the
AutoEQ
EQ WIZARD
mixerEQgain.
Press
DriveRack PA WIZARD
Auto
Auto
Warning
AFS
WIZARD
NEXT
PG
when
done.
System Setup
Connect mic to RTA
Auto EQ WIZARD
RTA INPUT button
input. Press RTA
AFS WIZARD
input button.
must be pressed.
®
®
®
®
Graphic EQ Setu
Select GEQ as D
Mono or Stereo
>Dual Mono
Auto EQ
Warni
RTA
INPUT
butt
Main
Speaker
must
be pressed
Select
Main PA
JBL SRX
>SR4702X Passi
AFS
Select Number o
fixed
filters.
Auto EQ
: Pink
FMic
F F Level
F F F L L L
Turn Up Level
Pink Level >
• The display is prompting you to connect an RTA-specific microphone to the front-
®
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS WIZARD
AFS
Please turn down the
mixer gain. Press
®
NEXT PG when done.
AFS
Select Number of
® PA User Manual
fixed filters.
> 6
DriveRack
F F F F F F L L L L L L
AFS
Select fixed ty
> Speech
7
ri-Amp
Section 1
®
DriveRack PA
Getting Started
Highand
Amplifier
High Amplifier
AmpItLevel
Amp the
Bridging
panel RTA XLR input,
press the <RTA Input>High
button.
is recommended that Low
you use
Select Sensitivity
Select an amplifier
Adjust level
Select
microphone.
If
you
wish
to
bypass
the
previous
optional dbx RTA-M
Crwn MacroTech 1202
same as your amp
same as your amp
<NEXT
steps 1202
all together,>0.775
from program
Volts mode, press the <RTA
>Crwn MacroTech
>25 Input> button, or press the>Normal
PG> button and the display will appear something like this:
Auto EQ : Pink Noise
Mic Level
Turn Up Level
Pink Level > 18dB
L L L L L
C PRECISION
LOW
F F F F F F L L L L L L
Auto EQ
to RTA
RTA
.
Warning
RTA INPUT button
must be pressed.
Auto EQ : Pink Noise
Mic Level
Turn Up Level
Pink Level > 18dB
LR
Auto EQ : Pink No
Mic Level
Turn Up Level
Pink Level > 18d
Auto EQ
• You will now proceed to “Pink” the room by adjusting the Pink level. The range of bar graph
AFS
AFS
Slowly Increase the
AFS
is -30dBu to +20dBu.
certaintype
to raise the pink noise
level
to the
SelectBefixed
Fixed Filter Setu
mixer
gain
to level to be used during
Select Number of
Once the Pink level has been adjusted
to the
desired volume, press Done
the
> Speech
desired
level.
fixed filters.the>performance.
6
F
F
F
F
F
F
L
L
L
L
L
L
F
F F F F L L L L
F F FSpeaker
F F F L L L
L
L
L
Main
Sub
Speaker
High
Amplifier
High
Amplifier
<NEXT PG> button and the Auto EQ sequence will begin. The display will either showFthe
Select Main PA graphic EQ or the
Select
Sub
PA
Select
an
amplifier
Select
Sensitivity
RTA. Rotating the <DATA> wheel clockwise and counter clockwise will
JBL SRX
Crwn MacroTech 1202
toggle
between
the
two modes. You can also select
either
mode to 1202
default to in>0.775
the Utility
>SR4702X Passive
>None
>Crwn
MacroTech
Volts
menu. Regardless, the display will appear something like this:
down the
Press
one.
up
Dual
Auto EQ : Pink Noise
Mic Level
Turn Up Level
Pink Level > 18dB
ton
d.
RESPONSE
Graphic EQ Setup
Main
Speakerresponses for the Auto
High
Amplifier
• You can now select
anySpeaker
one of the several differentSub
Frequency
EQ.
Select GEQ as The
Dualoptions are: Select
Main
PA
Select
Sub
PA
Select
Flat (0), and Response A-D, and Low, Medium and High Precision. Once an amplifier
Mono
JBL SRX
AFSor Stereo
and
have selected
your desired
EQ Frequency response,
>Dual
Mono
>SR4702X
Passive
>Nonepress the <NEXT PG> button
>Crwn
MacroTech 120
Fixed
Filteryou
Setup
Done
the display will appear as follows:
as MONO
ase the
o
l.
ing
A
uE
tQ
o
LR
Auto EQ
Auto EQ : Pink Noise
Mic Level
Turn Up Level
Pink Level > 18dB
A
uE
tQ
o
RESPONSE
C PRECISION
DriveRack®
of
> 6
L L L
• At this point, the
PA will automatically EQ the room. If you are using independent left and right graphic EQs, you will auto EQ each side independently. If you are using
AFS
Slowly Increase the
AFS
a stereo-linked EQ,
bothgain
sides to
will be EQ’d simultaneously.
Auto EQ
can be aborted at any
Select fixed type
mixer
Fixed Filter
Setup
point in the process
by pressing
> Speech
desired
level.the <NEXT PG> button.
Done Upon completion of the Auto EQ
F F F to
F Fprogram
F L L Lmode
L L Lby releasing
F Fthe
F F<RTA
F F LInput>
L L L Lbutton
L
Wizard, you can return
and pressing
the <PROGRAM> button.
For more information regarding the Auto EQ section, please refer to the Auto EQ Optimization
Tips information located in the Appendix section.
®
AFS WIZARD
• The DriveRack® PA also offers its exclusive AFS (Advanced Feedback Suppression) module.
This unique feature now makes unwanted feedback in a PA system a thing of the past. The
AFS Wizard will lead you through the setup of of the fixed filters of the AFS module. From
DriveRack® PA Wizard menu, rotate the <DATA> wheel until the display appears as follows:
®
®
8
DriveRack® PA User Manual
L
®
DriveRack PA
ack PA WIZARD
m Setup
EQ WIZARD
IZARD
U 1
ack
PA WIZARD
Tri-Amp
m St
Setup
EQ WIZARD
IZARD
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS WIZARD
AFS
Please turn down the
mixer gain. Press
AFS
Select Number of
fixed filters. > 6
NEXT PG when done.
F F F F F F L L L L L L
AFS
Select fixed type
> Speech
Q
t mic to RTA
Press RTA
button.
Auto
EQ Warning
Auto
EQ : at
Pink
R
The Fixed/Live
filter usage will be
indicated
the Noise
bottom of each Lpage
of the feedMic
Level
back elimination effect. ‘F’ indicates an available fixed filter, and ‘L’ indicates an availTurn Up Level
RTA INPUT button
A blocked out F or
L indicates
that is set, or in use. Once the
able live
must
be filter.
pressed.
Pink
Level >a filter
18dB
Auto EQ
desired number has been selected, press the <NEXT PG> and the display will read:
turn down the
gain. Press
AFS
Select Number of
fixed filters. > 6
AFS
Select fixed type
> Speech
RTA
INPUT
butto
Speaker
Main
must
be pressed.
Main PA
Select
JBL SRX
>SR4702X Passi
AFS
Select Number of
fixed
EQ : Pink
Auto filters.
FMic
F F Level
F F F L L L
Turn Up Level
Pink
> 1
Sub Level
Speaker
Select Sub PA
>None
AFS
Select fixed ty
> Speech
LR
Auto EQ
Slowly Incre
mixer gain t
desired leve
High Amplifie
Select an amp
>Crwn MacroTe
Auto EQ : P
Mic Level
Turn Up Lev
Pink Level
AFS
Fixed Filte
Done
Slowly Increase the
mixer gain to
desired level.
F F F F F F L L L L L L
F F F F F F L L L L L L
®
F F F F F F
®
• These types pertain to the Q, sensitivity, and algorithm type. The filter is established
by using the formula: Q= Freq divided by Bandwidth. This means that a higher Q
will produce a filter that is more narrow. Values are: Speech (Bandwidth = 1/5
octave and Q=7.25) Music Low (Narrow notch filter, Bandwidth = 1/10 octave and
Q=14.5), Music Medium (Very Narrow notch filter, Bandwidth = 1/20 octave and
Q=29) Music High (Ultra Narrow notch filter, Bandwidth = 1/80 octave and Q=116).
To guarantee that feedback is suppressed at lower frequencies, the AFS may place
wider notch filters at these lower frequencies (below 700 Hz). Once the desired fixed
®
®
Warnin
F F F F F F L
• You will now use the <DATA> wheel to select the number of fixed filters. This will
range from values 0-12. The total number of filters will stay at 12, and the number of
live filters will be = Total Num Filters – Num Fixed. Live and Fixed filter types differ
in that FIXED mode filters are automatically assigned to a frequency creating feedback,
thus remaining at that frequency until cleared by the user. In LIVE mode, live filters
Sub
Main Speaker
Graphic EQ detect
Setup and remove feedback
automatically
frequencies in the presence
of Speaker
audio (music
Select
Subrobin.
PA
Mainbeen
PA used, they begin
Select
GEQ When
as Dual
or
speech).
all of the live Select
filters have
to round
JBL SRX
Mono or Stereo
Essentially
this means that the first >SR4702X
filter set is Passive
replaced where a new feedback
>None is detect>Dual Mono
ed and notched out. This mode is useful because feedback frequencies may change
as the microphone is moved, and/or as the characteristics of the venue change.
when done.
Auto EQ
Section 1
AFS
DriveRack PA WIZARD
System Setup
Please turn down the
mixerEQ
gain.
Press
Auto EQ
EQ WIZARD
Warning
Auto
Auto
DriveRack PA WIZARD
AFS WIZARD
NEXT PG when done.
mic to RTA
System Setup
Connect
input. Press RTA
Auto EQ WIZARD
RTA INPUT button
must
pressed.
input
button.
AFS WIZARD
Input
Setup
Graphic
EQ
Setup
MainbeSpeaker
• Press
the
<NEXT
PG>
button
and
the
display
will
read:
Select Input as MONO
Select GEQ as Dual
Select Main PA
or STEREO.
Mono or Stereo
JBL SRX
>STEREO
>Dual Mono
>SR4702X Passive
DriveRack PA WIZARD
AFS
AFS
System Setup
Select Number of
Please turn down the
Auto EQ WIZARD
fixed filters. > 6
mixer gain. Press
AFS WIZARD
NEXT PG when done.
F F F F F F L L L L L L
Auto EQ
Auto EQ Warning
Auto EQ : Pink Noise
Connect mic to RTA
Mic Level
RTA INPUT button
input. Press RTA
Turn Up Level
<NEXT
PG>> but• Once
gain level of the mixer must
has been
turned down, press the Pink
inputthe
button.
be pressed.
Level
18dB
ton and the display will read:
ack PA WIZARD
m Setup
EQ WIZARD
IZARD
Setup
Input as MONO
REO.
O
DriveRack PA WIZARD
Auto EQ
System Setup
Connect mic to RTA
Auto EQ
WIZARD
input.
RTA
EQ Setup
Setup
GraphicPress
Input
AFS WIZARD
button.
GEQ as Dual
Input as MONO
Select
Select
Gettinginput
Started
Mono or Stereo
or STEREO.
>Dual Mono
>STEREO
®
®
DriveRack® PA User Manual
9
Select Main PA
JBL SRX
>SR4702X Passive
Dual
o
ning
Select an amplifier
>None
>Crwn MacroTech 1202
DriveRack PA
Getting LStarted
Auto EQ : Pink Noise
R
Auto EQ : Pink Noise
Mic Level
Mic Level
Turn Up Level
Turn Up Level
Pink Level > 18dB
Pink Level > 18dB
Auto EQ
type has been selected, press the <NEXT PG> button and the display will read:
AFS
Select fixed type
> Speech
Slowly Increase the
mixer gain to
desired level.
F F F F F F L L L L L L
L L L L
e
Noise
8dB
Select Sensitivity
Crwn MacroTech 1202
>0.775 Volts
®
Section 1
tton
ed.
of
. > 6
Select Sub PA
A
uE
tQ
o
RESPONSE
C PRECISION
AFS
Fixed Filter Setup
Done
F F F F F F L L L L L L
High Amp Level
Sub Speaker
High Amplifier
High Amplifier
Adjust level
Select Sub PA
Select an amplifier
Select Sensitivity
• You are now prompted to raise the output gain
of the
mixer to the
level of thesame
performance.
as your amp
Crwn
MacroTech
1202
>25the mixer.
>None
MacroTech
>0.775
Volts
an input
signal running through
Note that you >Crwn
are raising
the mixer1202
gain without
Once the desired level has been set and all of the fixed filters have been assigned, the unit
will automatically move you to the page that indicates the fixed filter setup has been completed. If you have
reached
the performance
level
A setting and all of the fixed filters have not
LR
Auto
EQ : Pink
Noise
E
Mic want
Level
been used, you may
to return to the page utthat
Q selects the number of fixed filters and
Turn Up Level
o you with additional live filters. Regardless,
re-adjust the number
of
fixed
in
order
to
provide
Pink Level > 18dB
RESPONSE C PRECISION LOW
Auto EQ
once you have completed the setup, the display will read:
Slowly Increase the
mixer gain to
desired level.
pe
F F F F F F L L L L L L
AFS
Fixed Filter Setup
Done
F F F F F F L L L L L L
• To return to program mode, simply press the <PROGRAM> or <NEXT PG> button. For
more information regarding feedback elimination, please see the AFS parameters of the
Detailed parameters section.
®
®
®
10
DriveRack® PA User Manual
®
DriveRack PA
Section 2
Editing Functions
EDITING
FUNCTIONS
®
Section 2
Editing
Functions
®
Editing Functions
DriveRack PA
The DriveRack® PA has been carefully designed and engineered to ensure that all aspects of
operation are intuitive and logical. Simply stated, the DriveRack® PA operating system was
designed with user’s best interest in mind.
2.1 Basic Navigation Modes
Navigational aspects of the DriveRack® PA are clear, concise and more important: flexible. The
DriveRack® PA provides you with essentially three different modes of navigation when performing program edits. 1. FX buttons - This array of 12 FX buttons is your primary mode of
directly accessing any effect module. 2. NEXTPG & PREVPG page buttons - Successive
presses of the NEXTPG or PREVPG page buttons will move the user from one page to the
next in an effect block. 3. Data Wheel - The Data Wheel is used to move through the program menu of the DriveRack® PA. The Data wheel is also used to change the values of the
selected parameter by simply rotating the wheel. Pressing the Data wheel will toggle between
the available parameters on any selected page of the currently selected effect module.
2.2 FX Button Array Overview
PREVIOUS PAGE - Moves to the previous page in the currently selected
effect menu.
NEXT PAGE - Moves to the next page in the currently selected effect menu.
EQ - Selects the EQ effect menu. This is the EQ section located prior to the
crossover section. Successive presses will rotate through the various precrossover 28 band EQ and Post-xover PEQ section modules.
SUBHARMONIC - Selects the Subharmonic Synthesizer section.
XOVER - Selects the Crossover section.
FEEDBACK - Selects the Advanced Feedback Suppression (AFS) effect section.
COMP/LIMITER - Selects the Compressor and the Limiter effect section.
Successive presses will move from the Compressor (pre-xover) to the Limiter (postxover).
DELAY - Selects the Alignment Delay effect module.
®
PROGRAM - This button is used to enter the Program screen from any sub
section within the unit when pressed.
UTILITY - Selects the Utility menu of the DriveRack PA.
®
STORE - The store button is used to store program edits.
WIZARD - Enters the DriveRack PA Wizard setup menu which includes:
System Setup, Auto EQ setup and AFS Wizard.
®
12
DriveRack® PA User Manual
®
DriveRack PA
Editing Functions
Section 2
2.3 Navigatingthe
the EQ
Section
(28-GEQ and PEQ)
Navigating
"EQ
Section"
To edit the parameters of the EQs used in a selected program, simply use the following procedure. From program mode,
press the EQ button to reach the EQ module to be edited. Successive presses of the EQ button will move through each channel.
Navigate through the Pages of the selected EQ section by depressing "Next Page" or "Prev Page" successively until arriving at the desired Page.
GEQ/PEQ
EQ
The EQ button
toggles through
the EQs used in
each channel of
the selected
program
menu.
GEQ
EQ
GEQ On/Off
Flatten/Restore
Frequency
Gain -12dB to12dB
or
PEQ
PEQ On/Off
Flatten/Restore
Bell,HSelf, LShelf, LHShelf,
Band 1 Freq
Gain -12dB to12dB
Q .20 to 16.0
Band 2 Freq
Gain -12dB to12dB
Q .20 to 16.0
Band 3 Freq
Gain -12dB to12dB
Q .20 to 16.0
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
2.4
Navigating the
Subharmonic
Section
Navigating
the
Subharmonic
Synthesizer Section
From program mode, press the SUBHARMONIC button. Pressing the Data Wheel will select the effect parameter to be edited.
<PREV PG
NEXT PG>
SUBHARMONIC
Subharmonic
Subharmonic - -On/Off
Subharmonics % 0-100
The NEXT and PREV
buttons scroll through
the pages of selected module.
24-36Hz Level - 24-36Hz
36-56Hz Level - 36-56Hz
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
®
®
Navigating the Delay Section
From program mode, press the Delay button. Pressing the Data Wheel will select the effect parameter to be edited.
®
<PREV PG
®
NEXT PG>
DELAY
DELAY
Delay - On/Off
Length - Delay Time - Course, Fine
Units - Seconds,Feet,Meters
®
The NEXT and PREV
buttons scroll through
the pages of selected module.
®
® PA User Manual
DriveRack
Successive presses of the Data
wheel will select
effect parameters within the currently selected page.
13
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
®
Section 2
DriveRack PA
Editing Functions
2.5 Navigating the XOVER Section
Navigating the Delay Section
To edit theFrom
parameters
the Crossover
in button.
a selected
program,
use thewill
following
procedure.
From program
mode,
programofmode,
press theused
Delay
Pressing
thesimply
Data Wheel
select the
effect parameter
to be edited.
press the X-OVER button. Once you have reached the Crossover module, Navigate through the Pages of the selected Crossover
module by pressing the "Next Page" or "Prev Page" buttons successively until arriving at the desired Page.
<PREV PG
DELAY
DELAY
NEXT PG>
Delay - On/Off
Length - Delay Time - Course, Fine
Units - Seconds,Feet,Meters
XOVER
The NEXT and
PREV
XOVER
buttons scroll through
the pages of selected module.
High Pass
Low Pass
High Pass
Freq- 20.kHz to Out
Type -BW6-24,LR12,24
Gain- Inf to 20dB
Freq- 20.kHz to Out
Type- BW6-24,LR12,24
Freq- 20.kHz to Out
Type- BW6-24,LR12,24
Gain- Inf to 20dB
Low
Low
Low Pass
Freq- 20.kHz to Out
Type- BW6-24,LR12,24
High Pass
Freq- 20.kHz to Out
Type- BW6-24,LR12,24
Gain- Inf to 20dB
Successive presses of the Data wheel will select
Mid
High
effect parameters
within Mid
the currently selected
page.
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
2.6 Navigating the Feedback Suppression Section
Navigating the Advanced Feedback Supression (AFS) Section
From program mode, press the FEEDBACK button. Pressing the Data Wheel will select the effect parameter to be edited.
<PREV PG
NEXT PG>
FEEDBACK
FEEDBACK
AFS On/Off
AFS Clear
The NEXT and PREV
buttons scroll through
the pages of selected module.
Mode - Fixed/Live
Type- Speech, Low,Med and High
Number of Fixed filters 0-12
Live filter Lift - On/Off
Lift After - 0-60
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
Navigating the Utility Section
®
From program mode, press the UTILITY button. Pressing the Data Wheel will select the effect parameter to be edited.
UTILITY
UTILITY
LCD Contrast 1-16
AEQ Plot - RTA/GEQ
Sales Banner - On/Off
Type (BS,BW,L-R)
Type (BS,BW,L-R)
Compressor/Limiter
Frequency
Frequency
Slope Threshold MetersSlope
SSub >
®
<SSub
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
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DriveRack® PA User Manual
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DriveRack PA
Editing Functions
Section 2
2.7 Navigating the Comp/Limiter Section
Navigating the Compressor/Limiter Section
From program mode, press the comp/limiter button to move to eithter the Compressor or Limiter module. Once you have reached the Crossover module,
successive presses of COMP/LIMITER button will move through each channel that utilizes either a Compressor (pre Crossover) or Limiter (post-crossover) module.
Navigate through the Pages of the selected compressor or Limiter module by pressing the "Next Page" or "Prev Page" buttons successively until you arrive at the desired Page.
Navigating the Subharmonic Synthesizer Section
From program mode, press the SUBHARMONIC button. Pressing the Data Wheel will select the effect parameter to be edited.
COMP/LIMITER
The
Comp/Limiter
button
<PREV
PG
NEXT PG>
toggles through
the Compressor or
Limiter modules used in
each channel of
the selected
The NEXT and PREV
program.
buttons scroll through
the pages of selected module.
Threshold -40-20dB
Ratio 1:1 to ∞Inf:1
24-36Hz Level - 24-36Hz
Gain -20 to 20dB
36-56Hz Level - 36-56Hz
Comp On/Off
Over Easy Off, 1-10
Subharmonic - -On/Off
Subharmonics % 0-100
Subharmonic
COMP
LIMITER
COMPRESSOR/LIMITER
SUBHARMONIC
Limiter On/Off
Over Easy Off, 1-10
Threshold -40-20dB
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
Navigating the Delay Section
2.8 Navigating the Delay Section
From program mode, press the Delay button. Pressing the Data Wheel will select the effect parameter to be edited.
<PREV PG
NEXT PG>
DELAY
DELAY
Delay - On/Off
Length - Delay Time - Course, Fine
Units - Seconds,Feet,Meters
The NEXT and PREV
buttons scroll through
the pages of selected module.
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
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Navigating the Advanced Feedback Supression (AFS) Section
From program mode, press the FEEDBACK button. Pressing the Data Wheel will select the effect parameter to be edited.
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<PREV PG
®
NEXT PG>
DriveRack® PA User Manual
FEEDBACK15
FEEDBACK
AFS On/Off
AFS Clear
Mode - Fixed/Live
Type- Speech, Low,Med and High
Number of Fixed filters 0-12
Live filter Lift - On/Off
Lift After - 0-60
The NEXT and PREV
buttons scroll through
the pages of selected module.
Section 2
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
®
DriveRack PA
Editing Functions
Navigating the Utility Section
2.9 Navigating the Utility Section
Navigating the Utility Section
From program mode, press the UTILITY button. Pressing the Data Wheel will select the effect parameter to be edited.
UTILITY
UTILITY
From program
mode,
UTILITY button. Pressing the Data Wheel will select the effect parameter to be edited.
LCD Contrast
1-16press theCompressor/Limiter
AEQ Plot - RTA/GEQ
UTILITY
Threshold Meters
UTILITY
Sales Banner - On/Off
LCD Contrast 1-16
Compressor/Limiter
AEQ Plot - RTA/GEQ
Threshold Meters
Sales Banner - On/Off
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
2.10 Navigating the Wizard Section
Navigating the WIZARD Section
Navigating the WIZARD Section
From program mode, press the WIZARD button. Pressing the Data Wheel will select the effect parameter to be edited.
<PREV PG
<PREV PG
WIZARD
SYSTEM SETUP
NEXT PG>
From program
mode, press the
WIZARD button. Pressing the Data Wheel will select the effect parameter to be edited.
NEXT PG>
The NEXT and PREV
buttons scroll through
the pages of selected module.
The NEXT and PREV
buttons scroll through
WIZARD
the pages of selected module.
WIZARD
Input Setup - Stereo or
Mono
SYSTEM SETUP
GEQ Setup-Dual Mono
or Stereo Linked
Main Speaker SelectSee list
Sub Speaker SelectSee list
Input Setup - Stereo or
GEQ Setup-Dual Mono
Main Speaker Select-
Sub Speaker Select-
Mono
Amp Sensitivity-
or Stereo Linked
Low Amp
Amp Level
High, Mid, Low
Bridged/
NormalAmp Level
Low Amp
Amp SensitivityHigh, Mid, Low
Bridged/
High, Mid, Low
AUTO EQ WIZARD
NormalConnect Mic
Pink Noise Level
-Inf to 20dB
AUTO EQ WIZARD
High, Mid, Low
Connect Mic
Pink Noise Level
AFS WIZARD
-Inf to 20dB
Mixer gain turn
downAFS
prompt
WIZARD
Select Number of
Fixed Filters
- 0-12
Select Number of
Fixed Filters
- 0-12
Mixer gain turn
down prompt
See list
Load New
See list
Amp SelectHigh, Mid, Low
See list
Amp SelectHigh, Mid, Low
See list
WIZARD
ProgramLeft and Right when using
Linked Graphic EQ
Load New
Program-
Auto EQ - L
Auto EQ - R
Auto EQ - L
Auto EQ - R
Left and
Right
Auto
EQ when
- L-R using
Linked Graphic EQ
Auto EQ - L-R
Select Type Low, Med, High mode
Mixer Gain Adjust-
Fixed Filter Setup
Done-
Select Type Low, Med, High mode
Mixer Gain Adjust-
Fixed Filter Setup
Done®
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
Successive presses of the Data wheel will select
effect parameters within the currently selected page.
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DriveRack® PA User Manual
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DriveRack PA
Section 3
SOFTWARE
OPERATING
FUNCTIONS
®
Section 3
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DriveRack PA
Operating Functions
The Operation section of the DriveRack® PA will be your key to successful navigation of the
operation of the DriveRack® PA. The following information provides descriptions about program functions and operating functions of the DriveRack® PA.
3.1 Program Definition
The first step in understanding the thorough programming capabilities of the DriveRack® is to
understand the elements involved, that when combined, define a complete “program.” Within
an individual program, there are several levels of editing that make up the complete program.
After turning the unit on, you will be at the “program” mode level. This level supplies the user
with current program information such as: current signal path, effect usage, and program name.
From this point, the DriveRack® PA gives you the option of entering subsequent levels of operation that are dedicated to program editing. The Utility menu mode is accessed via the utility
menu, and is not part of a single program.
3.2 Navigating Factory Programs
From the factory, the DriveRack® PA is shipped with 25 factory programs that utilize carefully
constructed routing configurations that have been designed to accommodate virtually any sound
reinforcement and installation application. The factory programs offer a clear and concise
explanatory title to help get you up and running in a timely manner. These programs can also
be used as templates or starting points for the user to create custom programs.
Selecting Programs:
The quickest way to get up and running with the DriveRack® PA is to use any one of the factory programs that are available in the box. When you reach the factory program, a FACT icon
will appear above the factory program name. From program mode, use the <DATA> wheel to
scroll through the various programs. As each factory program is selected, the display will clearly indicate the title that is directly related to a specific application. Once a program is selected, press the <DATA> wheel to load the program. The display will appear something like this:
8
FACT
L G F S
U C
R G B B
ROCK VENUE
LR
P L LH RH
X
- 0+
COMP THR
P L LM RM
P L LL RL
Compressor
Over Easy
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Navigation Modes
The function buttons of the DriveRack® PA allow direct access to all editing and navigating functions of the DriveRack® PA. The functions of the aforementioned buttons are as follows:
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DriveRack® PA User Manual
-50 -3
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DriveRack PA
3.3 Editing Factory Programs
Once you have reached the module that you wish to edit, simply use the <PREV PG>
and <NEXT PG> buttons to move through the pages within the module. The
<DATA> wheel is used to edit parameter values. The following illustration shows an
example of the Comp module in edit mode:
LR
P L LH RH
X
NAME: ROCK V
- 0+
COMP THR
P L LM RM
P L LL RL
-50 -30 -12 -5 0
Compressor
Over Easy
ON
OFF
DATA - SELECTS CH
PREV/NEXTPG - LEF
PRESS STORE TO AD
Note that the arrow indicates the currently selected parameter for editing. To select
parameters to edit from the current page, simply press the <DATA> wheel until the
arrow is pointing to the parameter that you wish to edit.
Once you are satisfied with the changes that have been made to a factory or user program, the DriveRack® allows you to save these changes as a custom USER program by
pressing the <STORE> button, and the display will appear as follows:
®
®
NAME: ROCK VENUE
0+
HR
Section 3
<PREV PG> - is used to navigate back through the various pages of any module block.
<NEXT PG> - is used to navigate forward through the various pages of any module block.
<EQ> - is used to move to the EQ modules. Successive presses will move you through the
EQ modules in the input section and through EQ modules located in the output section.
<SUBHARMONIC> - This button is used to move to the Subharmonic Synthesizer module.
<XOVER> - is used to move to the Crossover module.
<FEEDBACK> - is used to move to the feedback elimination module.
<COMP/LIMITER> - is used to move to the Compressor or Limiter modules.
<DELAY> - is used to move to the Delay module.
<PROGRAM> - is used to enter program mode when pressed.
<UTILITY> - is used to access the the Utility menu.
<STORE> - is used to store any program changes.
<WIZARD> - is used to enter the Wizard section which includes: SYSTEM SETUP, AUTO EQ
WIZARD and AFS WIZARD.
G F S
U C
G B B
VENUE
Operating Functions
-50 -30 -12 -5 0
ssor
asy
ON
OFF
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DATA - SELECTS CHAR
PREV/NEXTPG - LEFT/RIGHT:
PRESS STORE TO ADVANCE
> Replace Old
Store New
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PRESS STORE TO ADV
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DriveRack® PA User Manual
19
Section 3
®
Operating Functions
• Rotating the <DATA> wheel will change the icons on the currently selected position.
• Pressing the <DATA> wheel will toggle between upper and lowercase letters, numbers
or symbols.
• Use the <PREV PG> and <NEXT PG> button to move icon positions.
• Once the desired title has been written, press the <STORE> button again and the display will now appear something like this:
INSERT:
6
DriveRack PA
STORE: ROCK VENUE
Replacing
U1 DJ Setup
PRESS STORE TO ADVANCE
SR4725+sSub
SR4725+sSub
• Rotate the <DATA> wheel to select the program to be replaced and press the <STORE>
button and the existing program will be replaced with the new program.
The DriveRack® PA will store 25 user programs in addition to the 25 factory programs.
Note: Factory programs cannot be over-written. When storing changes to a Factory program, you must replace an existing User program.
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DriveRack® PA User Manual
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DriveRack PA
Section 4
PARAMETERS
DETAILED
PARAMETERS
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Section 4
DriveRack PA
Detailed Parameters
The DriveRack® PA offers complete editing flexibility, by offering in-depth control over every
parameter within each effect module. The following section will provide you with descriptions
and explanations of all parameters within the DriveRack® PA.
4.1 Pre-Crossover
The DriveRack® PA’s Pre-Crossover EQ section may be configured as a single or linkable 28
band graphic EQ.
EQ On/Off
Turns the GEQ on and off.
Flatten/Restore
This parameter either flattens the GEQ or restores the GEQ to the last setting before flattening.
The DriveRack unit allows you to leave the EQ edit window and return without losing the edited EQ settings.
Frequency (F) 31.5Hz to 16.0kHz
This parameter allows you to select any one the 28 available frequencies.
Gain (G) -12 to +12 dB
This parameter allows you to adjust the level of any one of the 28 bands of the GEQ in .5 dB
increments.
4.2 Feedback Eliminator
The DriveRack® PA is the first product in the dbx family to offer the exclusive patent pending
AFS (Advanced Feedback Suppression) feedback elimination module. Feedback is caused
when a microphonic signal such as a guitar pickup or microphone is reproduced by an amplification and is repeatedly picked up in phase. The AFS uses Precision Frequency Detection and
state-of-the-art processing to determine the exact portions of a given frequency of your feedback that need to be removed (instead of taking out large sections of your sound). The AFS
module of the DriveRack® PA allows the user to optimize the elimination of feedback. In the
past, graphic equalizers were used to eliminate feedback from a system. This was an acceptable method for eliminating feedback, but when this method was precision tested, the result
clearly showed that a single 1/3 octave EQ slider was removing approximately half of the signal power. With the AFS, the module removes the feedback automatically and the proprietary,
precision AFS filters remove only a fraction of the frequency spectrum. The following diagram
shows AFS as opposed to competing, competitive feedback eliminators and conventional graphic EQs:
dbx AFS
Conventional Feedback Elimination
®
Graphic EQ
®
AFS On/Off
Turns the AFS module on and off. If AFS is Off, the filters are bypassed, and the algorithm is
halted (the filters are not updated). If AFS is On, the filters are active, and the they are updated according to the current selected mode (Fixed or Live).
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DriveRack® PA User Manual
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DriveRack PA
Detailed Parameters
Section 4
Clear Live/All
This parameter clears the filters. If Clear Live is selected, then (if invoked) the live filters are
reset. If Clear All is selected, then (if invoked) all of the filters are reset. When either Clear
Live or Clear All is selected, the third parameter row displays “Start w/ Data Wheel.” If Clear
(none) is selected, then nothing is displayed on this row. When the user moves to this third
row and turns the Data Wheel (when Clear Live or Clear All is selected) then the filter reset is
invoked.
Mode - Live or Fixed
When the mode is Fixed, the algorithm updates only the fixed filters. When the mode is Live,
the algorithm updates only the live filters. In FIXED mode, the filters are automatically assigned
to a frequency creating feedback, thus remaining at that frequency until cleared by the user.
Fixed mode is used before the performance without any input signal. In LIVE mode, the live
filters automatically detect and remove feedback during the performance. When all of the live
filters have been used, they begin to round robin. Essentially this means that the first filter set
is replaced where a new feedback is detected and notched out. This mode is useful because
feedback frequencies may change as the microphone is moved, and/or as the characteristics of
the venue change.
Type - Speech, Low Music, Medium Music and High Music
If Fixed or Live mode is chosen, the text will read “Type.” The options will be Speech, Music
Low, Music Medium and Music High. These types pertain to the Q, sensitivity, and algorithm
type. Values are; Speech (Bandwidth = 1/5 octave and Q=7.25) Music Low (Bandwidth = 1/10
octave and Q=14.5) Music Medium (Bandwidth = 1/20 octave and Q=29) Music High
(Bandwidth = 1/80 octave and Q=116). Note: To guarantee that feedback is suppressed at lower
frequencies, the AFS may place wider notch filters at these lower frequencies (below 700 Hz).
Number Fixed - 0-12
This will range from values 0-12. The total number of filters will stay at 12, and the number of
live filters will be = Total Num Filters – Num Fixed. If this is changed before the filters are
reset, then the filters will be reset one by one as the number changes. For example, if the number of Fixed filters goes down, then the last fixed filter set will be reset. Likewise, if the number of Fixed filters goes up (and thus the number of live filters goes down), then the last live
filter set will be reset. The Fixed/Live filter usage will be indicated at the bottom of each page
of the feedback elimination effect. ‘F’ indicates an available fixed filter, and ‘L’ indicates an
available live filter. A blocked out F or L indicates a filter that is set, or in use.
Live Filter Lift (On/Off)
This parameter turns the Live Filter Lift on and off.
Lift After - 5 sec to 60 min
This parameter allows the user to setup the box so that the Live filters will automatically be
removed after a set time (as indicated by the "Lift After" parameter). It ranges from 5 seconds
to 60 minutes. This feature is useful if the microphone being used is moved or the characteristics of the venue change over time. As example; a filter placed minutes ago will not be presently preventing feedback. This feature removes unnecessary filters from the spectrum to increase
sonic quality. If the feedback is still there (after the filter is removed), it will catch it and notch
it out the same.
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DriveRack® PA User Manual
23
Section 4
®
Detailed Parameters
DriveRack PA
4.3 Subharmonic Synthesizer
The Subharmonic Synthesizer module has been specifically optimized to enhance Bass audio
material for use in a variety of professional applications, including nightclub and dance DJ mixing, theatre and film sound, music recording, live music performance and broadcasting.
The Subharmonic Synthesizer module’s two separate bands of subharmonic synthesis provide
the best combination of smoothness and control, and the independent low frequency boost circuit is designed to get the most out of high-performance low frequency speaker systems.
Sub-Harmonic Synth - On/Off
Turns the Subharmonic Synth module on and off.
Sub-Harmonics Synth - 0 to 100%
This parameter sets the overall level of the Subharmonic Synthesizer.
24-36Hz and 36-56Hz (Subharmonic Synthesis) Level - 0 to 100%
These controls individually let you customize the amount of the respective synthesized frequencies to be added in, tuning the ultimate bass response of your system to taste. For
example, if the sound is too woofy or growly, try turning down the 36Hz-56Hz level. If your
woofers are bottoming out (making a ticking, popping sound), try turning down the 24Hz36Hz level. You may find that a setting produces fine results in one room, but produces too
much boominess in another. If this occurs, adjust the controls as needed, (e.g., increase one
or the other of the band levels). Experimentation will pay off with smooth, full, deeply
extended bass. Remember, you are not selecting a frequency. You are controlling the overall
level of each band.
4.4 Crossover
The Crossover is used to divide the input signal into several frequency bands. This allows
the user to drive the speaker in its optimum frequency range and send each output separately
for more efficient use of amplifier power. The DriveRack® PA Crossover can be configured as
a 2x3, 4, 5, or 6. Appendix A.5 illustrates each of the available crossovers. The High frequency output is created using a High-Pass filter. The Mid and Low outputs are created using
Band Pass filters consisting of Low-Pass and High-Pass filters. When editing Crossover parameters the frequency band is indicated by the highlighted H, M, or L in the top left corner of
the screen. The High-Pass or Low-Pass filter being edited is indicated by the highlighted
edge in the graphics area. For each Low-Pass filter there are two parameters:
Frequency
Adjusts the frequency of the Low Pass filter from 20 to 20KHz.
Type
Selects the filter type. Selections are BW 6,12,18,24 for Butterworth type filter with slope of
6, 12, 18 or 24 dB/Octave and LR12, 24 for Linkwitz-Riley type with slope of 12 or 24
dB/Octave.
®
For each High Pass filter there are three parameters and they are follows:
®
Frequency
Adjusts the frequency of the High Pass filter from 20 to 20KHz.
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DriveRack® PA User Manual
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DriveRack PA
Detailed Parameters
Section 4
4.5 Post-CROSSOVER PEQ
In addition to the pre-crossover EQ options within the signal path, the DriveRack® PA also offers
a 2 or 3-band parametric EQ after the crossover section. The parameters for the post-crossover
EQ are as follows and are user adjustable.
PEQ On/Off
Turns the PEQ band on and off.
The following figure shows the constant Q parametric filter.
Flatten/Restore
This parameter either flattens the PEQ or restores the PEQ to its original shape.
Type
This parameter selects the PEQ type. Types include: 1. Bell-All parametrics are bell-shaped 2.
HShelf - One shelf is High, while all others are bell 3. LShelf - One shelf is Low, while all others are bell and 4. LHShelf - One shelf is High and one is Low, and the others are bell.
Band (1-3) Frequency 20Hz to 20kHz
Selects the frequency of the selected band of the parametric EQ.
Level (1-3) -12dB to 12dB
Sets the peak level of the selected parametric EQ.
Q (1-3) 0.20 to 16 dB
Sets the Q or Bandwidth of the selected Parametric EQ.
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DriveRack® PA User Manual
25
Section 4
®
Detailed Parameters
DriveRack PA
4.6 Compressor/Limiter
The DriveRack® PA also offers Compression and Limiter modules. The Compressor is a full
bandwidth Stereo Compressor located prior to the Crossover. The Compressor is the perfect
tool for tightening uneven signal sources such as vocals and guitars. The Limiters are located
on each stereo output channel and have been strategically placed for speaker and amplifier protection. Note that Compressor/Limiter threshold metering can be observed on page two of the
Utility section. The parameters for the Compressor/Limiter are as follows and are user
adjustable.
COMPRESSOR
Compressor On/Off
Turns the Compressor module on and off.
OverEasy (O) Off to 10
There are ten levels of OverEasy® that can be used for the limiters. The point when the compressor starts to compress is the "knee." When the compressor starts to reduce the level of a
signal abruptly as it passes over the threshold, this is called "hard knee" compression.
OverEasy® (soft knee as it is sometimes called) is when the volume of the sound is compressed
gradually. OverEasy® compression starts to compress before the level of the signal reaches the
threshold and reaches full compression after the level has gone above the threshold.
OverEasy® compression, by its very nature, sounds much smoother and more natural and will
be used for most applications. When it is gentle (natural sounding or light) compression that
you are looking for, the compressor offers VariKneeTM. VariKnee™ gives you ten levels of
OverEasy® compression to choose from (1 being almost hard knee and 10 being the most
OverEasy®). This lets you choose the exact knee that is needed for the dynamic effect you are
looking for.
Threshold (T) -40 to +20dBu
Threshold is the signal level at which the unit starts to compress the signal. If the level is set to
-10 dBu, than any signal larger than -10 dBu is compressed while any signal that has a level
that is lower than -10dBu is left at the same signal level. Light compression is where only the
loudest parts of the signal go over the threshold. Very heavy compression can be achieved by
setting the threshold low enough that almost the entire signal content is over the threshold. For
most signals the most natural compression is achieved when most of the signal content remains
just below the threshold and only the peaks cross the threshold.
Ratio (R) 1.0 to Inf:1
Ratio is the amount the unit reduces the signal level of the sound that is above the threshold.
A 2:1 ratio means that if the incoming signal is 2dB over the threshold the unit will compress
the signal, and outputs a signal that only goes 1dB over the threshold. For light compression
choose a lower ratio, while a heavy compression requires a higher ratio. A setting of Inf:1 makes
the compressor act as a limiter.
®
Gain (G) -20 to +20 dB
This parameter is used to compensate for the gain lost during compression. By using heavy
compression on a signal and then boosting the signal with the output gain, the user can create
a signal that sounds much louder than it actually is.
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DriveRack® PA User Manual
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DriveRack PA
Detailed Parameters
Section 4
LIMITER
Limiter On/Off
Turns the Limiter module on and off.
OverEasy (O) Off to 10
There are ten levels of OverEasy® that can be used for the limiters. The point when the compressor starts to compress is the "knee." When the compressor starts to reduce the level of a
signal abruptly as it passes over the threshold this is called "hard knee" compression. OverEasy®
(soft knee as it is sometimes called) is when the volume of the sound is compressed gradually. OverEasy® compression starts to compress before the level of the signal reaches the threshold and reaches full compression after the level has gone above the threshold. This OverEasy®
compression, by its very nature sounds much smoother and more natural and will be used for
most applications. When it is gentle (natural sounding or light) compression that you are looking for, the compressor offers VariKnee™. VariKnee™ gives you ten levels of OverEasy® compression to choose from (1 being almost hard knee and 10 being the most OverEasy®). This lets
you choose the exact knee that is needed for the dynamic effect you are looking for.
Threshold (T) -40 to +20dBu
Threshold is the signal level at which the unit starts to compress the signal. If the level is set to
-10 dBu, any signal larger than -10 dBu is compressed while any signal that has a level that is
lower than -10dBu is left at the same signal level. Light compression is where only the loudest
parts of the signal go over the threshold. Very heavy compression can be achieved by setting
the threshold low enough that almost the entire signal content is over the threshold. For most
signals, the most natural compression is achieved when most of the signal content remains just
below the threshold and only the peaks cross the threshold.
4.7 Alignment Delay
DriveRack®
PA offers alignment delay to use for compensating signal delay that occurs due
The
to internal speaker components such as horns, speakers and subwoofers within speaker cabinets. The alignment delay is also ideal to compensate for the difference in high and low frequency speed. The parameters for the alignment delay are as follows and are user adjustable:
Delay On/Off
Turns the Speaker Alignment delay on and off.
Units - Seconds, Feet or Meters
Selects the unit of measurement for the delay.
Length
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Sets the amount of Speaker Alignment delay time. Delay times include: Seconds- 0.00-10.00 ms,
Feet- 0.00-11.3 and Meters - 0.00-3.43. Fine adjustments are made in 20uS increments. Coarse
adjustments are made in 21uS increments.
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DriveRack® PA User Manual
27
Section 4
®
Detailed Parameters
DriveRack PA
USER NOTES
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DriveRack® PA User Manual
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DriveRack PA
Section 5
APPLICATION
GUIDE
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Section 5
DriveRack PA
Application Guide
This Application guide section is provided to offer suggested installation applications of the
DriveRack® PA that will allow you to optimize peak performance of the units. Note that the 25
included application programs represent the extensive flexibility of the DriveRack® units. These
applications can be used verbatim, or as sample reference guide templates for designing countless audio applications.
5.1 2X6 Crossover
Hardware
1. Connect the outputs from the mixer to the inputs of the DriveRack®.
2. Connect the outputs of the DriveRack® PA and run to the selected speaker amplifier.
3. Make sure that the mixer and power amps are turned off prior to powering up the
DriveRack® PA.
Software
1. From Program mode, select factory program #F10 (SR4702 2X6) as a template, or use the
Wizard to setup the specific program.
2. Once the program has been chosen, press the DATA wheel to load the program.
Left
Right
Left Mid
Left Low
Right Mid
Right Low
Left High
Right High
1202
MA-3600VZ
MA-5002VZ
Left High
Left Mid
MA-1202
Right Mid
Right High
®
SR4731XF
SR4731XF
Left Sub
Right Sub
®
SR4719X
SR4719X
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DriveRack PA
Section 5
Application Guide
5.2- 2X5 Crossover
Hardware
1. Connect the outputs from the mixer to the inputs of the DriveRack®.
2. Connect the outputs of the DriveRack® PA and run to the selected speaker amplifier.
3. Make sure that the mixer and power amps are turned off prior to powering up the
DriveRack® PA.
Software
1. From Program mode, select factory program #F2 (3 Way w/mSub) as a template, or use the
Wizard to setup the specific program.
2. Once the program has been chosen, press the DATA wheel to load the program.
Left
Right
Right Mid
Left Mid
Mono Low
Left Mid
Left High
®
Left High
Right High
Right Mid
Right High
®
SR4731XF
SR4731XF
Mono Sub
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SR4719X
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Section 5
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DriveRack PA
Application Guide
5.3 2X4 Crossover
Hardware
1. Connect the outputs from the mixer to the inputs of the DriveRack®.
2. Connect the outputs of the DriveRack® PA and run to the selected speaker amplifier.
3. Make sure that the mixer and power amps are turned off prior to powering up the
DriveRack® PA.
Software
1. From Program mode, select factory program #F14 (MP212 2X4) as a template, or use the
Wizard to setup the specific program.
2. Once the program has been chosen, press the DATA wheel to load the program.
Left
Left Low
Right Low
Right
Left High
Right High
Left High
Right High
MP412
MP412
Right
MP4718SP
Powered
®
MP4718S
Non-Powered
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DriveRack® PA User Manual
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DriveRack PA
Application Guide
Section 5
5.4 - 2X3 Crossover
Hardware
1. Connect the outputs from the mixer to the inputs of the DriveRack®.
2. Connect the outputs of the DriveRack® PA and run to the selected speaker amplifier.
3. Make sure that the mixer and power amps are turned off prior to powering up the
DriveRack® PA.
Software
1. Use the Wizard to setup the specific program.
2. Once the program has been chosen, press the DATA wheel to load the program.
Left
Right
Left High
Mono Low
Right High
EON15 G2
EON15 G2
MP4718S
Non-Powered
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DriveRack® PA User Manual
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Section 5
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Application Guide
DriveRack PA
USER NOTES
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DriveRack® PA User Manual
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DriveRack PA
Appendix
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Appendix A
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DriveRack PA
A.1 Factory Reset
In the event that a reset is required, the DriveRack® PA offers you the option of performing a “Soft” or “Hard” reset. The
Soft Reset resets all operating parameters except user programs. The Hard Reset Procedure will reset all programmable
information back to the factory defaults.
All Power-Up Functions require a button(s) to be pressed and held as the unit power is turned on.
DriveRack PA Power-Up Button Functions
Factory (“Hard”) Reset.
Press and hold the <STORE> button at power-up until the following message appears:
“! HARD RESET?”
“Yes <PREV PAGE>”
“No <PROGRAM>”
• Pressing the <PREV PAGE> button will start a Factory Reset (All User Programs will become
copies of the Factory Programs, all Utility settings will be defaulted, and all Security settings
will be defaulted).
• Pressing the <PROGRAM> button will abort the Factory Reset sequence and the unit will reset
normally.
System (“SOFT”) Reset
• Press and hold the <UTILITY> button at power-up until the following message appears:
“! SOFT RESET?”
“Yes <PREV PAGE>”
“No <PROGRAM>”
• Pressing the <PREV PAGE> button will start a System Reset (All Utility settings will be defaulted.)
• Pressing the <PROGRAM> button will abort the System Reset sequence and the unit will
reset normally.
A.2 Power Up Quick Key Options
The DriveRack® PA offer several “Quick Key” options for initial power up and are as follow:
Change Initial Program Number
• To change the initial power program number, Press and hold the <PROGRAM> button at
power-up until the following message appears:
Use Wheel to”C
Change Restart”P
Program Number”
• Turning the <DATA> wheel will select the program you wish to load at initial reset.
• Press the <PROGRAM> button again when the selection is complete. Normal resetting will
continue.
System Lock Out
• Press and hold <WIZARD> at power-up until one of the following messages appears:
System Unlocked All user input will be accepted
or
System Locked No user input will be accepted
• Rotating the <DATA> wheel to select either Lock, Unlock or Filter Unlocked the system.
• Pressing <PREV PAGE> will unlock the system if it were locked or it will lock the system if it were unlocked.
• If you wish to leave the system locked with the exception of being able to clear the feedback filters, follow the same
procedure on power up and then rotate the <DATA> wheel to select the feedback filter unlock feature.
• Pressing any other button will abort the System Lockout sequence and the unit will reset normally.
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DriveRack PA
Appendix A
A.3 Specifications
Analog Inputs:
Number of Inputs:
Connectors:
Type:
Impedance:
Max input line level:
CMRR:
RTA Mic Phantom Voltage:
RTA Mic EIN:
(2) Line inputs. (1) RTA Mic input
(2) Female XLR line inputs, XLR RTA Mic input
Electronically balanced/RF filtered
> 40k Ω
+20dBu
> 45dB
+15VDC
< -117dBu, 22Hz-22kHz, 150Ω
Analog Outputs:
Number of Outputs:
Connectors:
Type:
Impedance:
Max Output Level:
Alignment Delay:
(6) Line Outputs
Male XLR
Electronically balanced, RF filtered
120 ohms
+20dBu
10ms per channel (60ms total)
A/D Performance:
Type:
Dynamic Range:
Type IV dynamic range:
Sample Rate:
dbx Type IV conversion system
>107 dB unweighted, >110 dB A-weighted
123 dB with transient material, A-weighted, 22kHz BW 121 dB with transient material, unweighted, 22kHz BW 115
dB typical with program material, A-weighted, 22kHz BW
48kHz
D/A Performance:
Dynamic Range:
112 dB A-weighted, 110dB unweighted
System Performance:
Dynamic Range:
THD+N:
Frequency Response:
Interchannel Crosstalk:
Crosstalk input to output:
110 dB unweighted, >107dB weighted,
0.002% typical at +4dBu, 1kHz, 0dB input gain
20Hz – 20kHz, +/- 0.5dB
>110dB, 120dB typical
>100dB
Power Supply:
Operating Voltage:
Power Requirements:
DO: 100-120VAC 50/60 Hz - EU: 220-240 VAC 56/60 Hz,
25 Watts
Physical:
Weight:
Dimensions:
5.5 lbs.(2.5 kg) Shipping weight 7 lbs. (3.18 kg)
1.75” H x 5.75” D x 19” W
A.4 Auto EQ Optimization Tips
By using the setup wizard, cross over output gains and post cross over parametric EQ settings
are set to match your system. The Auto-EQ can be used to adjust your system to compensate
for room effects, and adjust the response of the entire system to your liking. After allowing
Auto EQ to “pink the room” your system will sound tighter. The low end will have more definition, the mids will be more intelligible, and the highs can be tamed. Here are two things to
look for to get the best performance from the Auto-EQ.
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Look out for Modes
Some speaker and RTA microphone positions will result in certain frequencies canceling out.
The resulting modes can not be corrected with equalization. The Auto-EQ does not detect
modes in the frequency response, so may try to boost a band to compensate for a mode with
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DriveRack® PA User Manual
37
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DriveRack PA
Appendix A
out positive affect. You may be able to see if a lifted band is a mode by manually adjusting
a lifted EQ band - if no change in the EQ is perceived, you probably are seeing a mode in
your
frequency response. To reduce the effect of this mode, try different microphone positions
and adjust the location of your speakers, then repink the room for a more effectual Graphic
EQ adjustment.
Adjust Cross Over Output Gains
If your system setup or the response you have chosen results in the Auto-EQ lifting or cutting a number of consecutive bands of the Graphic EQ, you can adjust the level of the associated cross over output gain to match the average boost or cut in the graphic EQ and repink your room. This time, the adjustment of the Graphic EQ bands will be less “heavy handed” and the
system will sound better having fewer phase problems and a lower noise floor than a more
aggressively adjusted Graphic EQ. With the rest of your system properly adjusted, the Auto
EQ can compensate for room resonance and adjust to suit personal taste without large excursions in the Graphic EQ bands.
A.5 Crossover Diagrams
L
LH
L
LH
L
L
HP
HP
HP
R
RH
R
R
RH
R
+
LL
L Mono
BP
BP
RL
2X2
2X3(2-band)
2X4(2-band)
LH
LH
L
L
HP
HP
RH
R
RH
R
LM
BP
LM
BP
RM
RM
®
LL
+
L Mono
BP
BP
RL
®
2X5 (3-band)
HP - High Pass Filter
2X6 (3-band)
BP - Band Pass Filter
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Appendix A
Right Low
Left Low
Right Mid
Left Mid
Right High
Meters
Outputs
Left High
A.6 Block Diagram
Alignment Delay
Alignment Delay
Alignment Delay
Peak Stop Limiter
Peak Stop Limiter
Peak Stop Limiter
3-Band PEQ
2-Band PEQ
2-Band PEQ
Crossover Section - (2X3, 4,5,6)
Stereo Compressor
SubHarmonic Synth
GEQ
RTA
Meters
GEQ
AFS Notch Filters
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Micr Pre amp
Mic Input
Right Input
®
Left Input
Stereo/Mono
Pink Noise
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DriveRack® PA User Manual
39
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DriveRack PA
Appendix A
A.7 Program List / Speaker Tunings / Power Amp Tunings
PROGRAM LIST
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
Stereo 3Way
Stereo 2Way
Full Range
DJ Setup
Rock Venue
JRX112M
JRX115
JRX125
MRX512M
MRX515
MRX525
EON10G2
EON15G2
SRX712M
SRX712M
SRX715
SRX715
SRX722
SRX722
SRX725
SRX725
VRX928
VRX928
VRX932
VRX932
2X4
2X4
2X4
2X4
2X4
2X4
2X4
2X4
2X4
2X6
2X4
2X6
2X4
2X6
2X4
2X6
2x4
2x6
2x4
2x6
SPEAKER TUNINGS
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)
35)
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JRX112M
JRX115
JRX125
JRX118S
JRX118SP
SF12M
SF15
SF25
SF225P
MP212
MP215
MP225
MP410
MP412
MP415
MP255SP
MP418S
MP418SP
MRX512M
MRX515
MRX525
MRX518S
MRX528S
EON1500
EON10G2
EON15G2
EONSUBG2
SRX712M
SRX715
SRX722
SRX725
SRX738
SRX718S
SRX728S
SRX4702X
36)
37)
38)
39)
40)
41)
42)
43)
44)
45)
46)
47)
48)
49)
50)
51)
52)
53)
54)
55)
56)
57)
58)
59)
60)
61)
62)
63)
64)
65)
66)
67)
68)
69)
70)
71)
72)
73)
74)
75)
76)
77)
78)
79)
80)
81)
82)
83)
84)
85)
86)
87)
88)
89)
90)
91)
92)
93)
94)
95)
96)
97)
98)
99)
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
JBL
Cerwin Vega
Cerwin Vega
Cerwin Vega
Cerwin Vega
EAW
EAW
EAW
EAW
EV
EV
Mackie
Mackie
Mackie
Mackie
Peavey
Peavey
Peavey
Peavey
Peavey
Peavey
Peavey
Peavey
Peavey
Peavey
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
SRX4722X
SRX4725X
SRX4726X
SRX4731X
SRX4732X
SRX4733X
SRX4735X
SRX4715X
SRX4718X
SRX4719X
PRX512M
PRX515
PRX525
PRX535
PRX518S
VRX928LA
VRX932LA
VRX915M
VRX915S
VRX918S
V152
V122
Sub18B
Sub15
FRZ129z
FRZ153z
FRZ159z
FRZ250z
Elim i
Elim iS
C300
S500
SRM350
SRM450
PR10
PR12
PR15
PRSub
PV112
PV115
PV215
PV12M
PV15M
PV118
S112IV
S115IV
S215IV
SW118IV
SW215IV
BR10
BR12
BR15
BR12M
BR15M
S112V
S115V
S215V
SM10V
SM12V
SM15V
SW15V
SW18V
SW218V
C112V
100)
101)
102)
103)
104)
105)
106)
107)
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
Yamaha
C115V
C215V
CM10V
CM12V
CM15V
CW15V
CW18V
CW218V
AMPLIFIER TUNINGS
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)
35)
36)
37)
38)
39)
40)
41)
42)
43)
44)
45)
46)
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Crown
Peavey
Peavey
Peavey
Peavey
QSC
QSC
QSC
QSC
QSC
QSC
QSC
QSC
QSC
QSC
QSC
QSC
Yamaha
Yamaha
Yamaha
Yamaha
XLS 202
XLS 402
XLS 602
XLS 802
Xs 500
Xs 700
Xs 900
Xs 4300
XTi 1000
XTi 2000
XTi 4000
CE 1000
CE 2000
CE 4000
PowerTech 1.1
PowerTech 2.1
PowerTech 3.1
K1
K2
MacroTech 1202
MacroTech 2402
MacroTech 3600
MacroTech 5000
I-Tech 4000
I-Tech 6000
I-Tech 8000
PV900
PV1500
PV2600
PV3800
RMX850
RMX1450
RMX1850HD
RMX2450
RMX4050HD
RMX5050
PLX1104
PLX1804
PLX1802
PLX2502
PLX3102
PLX3602
P2500S
®
P3500S
P5000S
P7000S
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DriveRack® PA User Manual
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DriveRack PA
Appendix A
A.8 System Setup and Gain Structure
The DriveRack PA offers a wide range of tools for sound system design and setup. These tools
can make your system more efficient and better sounding, but to get the best possible sound it
is important to use these tools properly. In the DriveRack PA we have included a Wizard setup
tool to help in system setup. If you use the Wizard to set up your DriveRack PA it will automatically set the limiters for some amplifier selections. If your amplifiers are not available in
the Wizard, you should choose the Custom setting. The following section explains how to maximize system gain and how to use the limiters to protect your amplifiers from clipping.
In traditional system design, the output of your console would be routed to a system EQ, a compressor, and a crossover with output level control. From the crossover, there may be additional filters that are employed to improve the response of your speakers. There may also be limiters set up to keep your amplifiers from going into clipping and protect your speakers from
the hazards of a clipped signal. Your amplifiers play a vital role in system setup, because they
are last item in the chain before your speakers and offer the greatest amount of gain (that is
their job after all). If your amplifiers are incorrectly setup you will not be using your system to
its fullest potential and could be harming your speakers.
One thing that is critical to system setup is maximizing gain structure. Gain structure refers to
aligning the gain of each device so that they all clip at the same point, and the noise floor of
the entire system is at its absolute minimum. Quite often PA systems are setup with the amplifier input controls turned all the way up in the incorrect assumption that this is the only way
to get the maximum output level. Amplifiers are fixed gain devices, turning down the amplifier input attenuators does not change the potential output of the amplifier; it only requires more
input voltage to get full output power. Many amplifiers will clip with an input level greater than
+6 dBu when the input attenuators are turned all the way up. Most mixing consoles can deliver over +18 dBu of output level before clipping. This means that with your amps tuned all the
way up you are sacrificing 12 dB of headroom, resulting in poorer noise performance and the
potential of system clipping. By adjusting the amplifier controls properly, you can maximize
your system performance.
A way to set up your amplifiers for maximum gain structure is to use the clip indicators of the
console and amplifiers themselves. Disconnect the output of the amplifier from the speakers.
Run a continuous signal (pink noise or sine waves – many test CDs are available that have these
types of signals) through your console. Turn up the output of the console until it begins clipping. If there is no clip indicator on the console then use the output meters; most reputable
console manufacturers use red LEDs at the top of the meters to show the onset of clipping.
Once the console is clipping, back the output gain down slightly until the clip indicator turns
off. Run this signal through the DriveRack PA and into the amplifiers with the crossovers and
output gain section in the DriveRack PA set for your particular speakers. Make sure that the
output limiters are turned off. Run this signal into the amplifiers and turn up the input attenuators until the amplifier clip indicator begins to turn on. Turn the attenuators down slightly, so
the clip indicator no longer is on. You have just maximized the gain through your system. This
amplifier setting should give you maximum gain without clipping, another way of say this is
that when the output of your console is clipping you will also be at the clip point of your amplifiers.
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DriveRack® PA User Manual
41
Appendix A
™
DriveRack
Once you have found the clip point of your amplifiers, you can mark this position and turn the
amplifiers back up to the point where they are clipping. You can now use the output limiters
in the DriveRack PA to protect the amplifier from clipping no matter what you do at the console. With the amplifiers clipping, now go to the Limiter page of the DriveRack PA and turn
the limiter for each output band on. Make sure that the threshold is all the way up to +20dB.
Now slowly reduce the threshold until the clip indicator of the amplifier turns off. You have
successfully set the output limiter up and the amplifier will not be able to go into clipping no
matter what the input is. You should now proceed to the next output band and go through the
same process. If you are using a sine wave to create clipping in your amplifier you should
make sure that the sine wave is within the frequency range of the output band that your are
working with. Once all the limiters are set up you can now turn the amplifiers back down to
the gain maximized position. The Wizard will automatically set your limiters based on your
choice of amplifier. Because of component variances within the amplifier circuitry, you may
need to adjust the limiter settings by a few dB after running the Wizard to ensure that they are
set correctly.
Once all the limiters are set up and the gain is maximized, reduce the output of your console
and reconnect your speakers. Now for the fun part, sit back and send your favorite music
through the system. If your system is not loud enough, you may want to consider an amplifier or amplifiers with greater output power. Most loudspeaker manufacturers recommend an
amplifier that can provide 1.5 to 2 times the rated RMS power of the speaker. If this setting is
too loud when your speakers are reconnected you can turn down the amplifier input attenuators even more.
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42
™
DriveRack
Appendix A
USER NOTES
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43
®
8760 South Sandy Parkway • Sandy, Utah 84070
Phone: (801) 568-7660 • Fax (801) 568-7662
Int’l Fax: (801) 568-7583
E-mail us at: customer@dbxpro.com or visit us on
the web at: www.dbxpro.com
A Harman International Company
18-1790V-B
Printed in China
dbx DriveRack PA
Interactive Training
Guide
Proceed
1
Main Menu
Overview
Basic Navigation
Virtual DriveRack PA
Go To Index
2
Index
Overview
The DriveRack PA provides:
•Input Graphic EQ
•Advanced Feedback Suppression
•Subharmonic Synthesis
•Input Compression
•Crossover (Up to 3-Way)
•Output Parametric EQ
•Output Limiters
•Output Driver Alignment Delays (up to 10 ms)
Back To Main Menu
Proceed
3
Index
Overview
This illustration shows the DriveRack PA installed in a typical 3 Way system.
Prev Slide
Proceed
4
Index
Overview
This illustration shows what the DriveRack PA actually replaces in a sound
system.
Prev Slide
Proceed
5
Index
Overview
The processsing in the DriveRack PA is stereo tied. The input GEQ (Graphic EQ) is the
only exception. It can be configured in “Dual Mono” mode if desired.
Back To Main Menu
Prev Slide
6
Index
Basic Navigation
Don’t be afraid to experiment with the buttons and
controls on the DriveRack PA. It is recommended
that you familiarize yourself with these controls
before connecting the device to your system. Once
you feel comfortable with the navigation of the unit
you can easily perform the Factory Hard Reset
procedure (as described in the back of the Owner’s
Manual). This Hard Reset will set the device back to
it’s factory default state.
Enjoy!
The dbx Team
Back To Main Menu
Proceed
7
Index
Basic Navigation
This is the LCD display. This display allows you to view the various pages of
the DriveRack PA
Prev Slide
Proceed
8
Index
Basic Navigation
This is the Button Array. Use these buttons to navigate through the DriveRack
PA.
Prev Slide
Proceed
9
Index
Basic Navigation
Pressing any of these buttons will take you to the corresponding function.
Note: Some buttons will toggle through the various input and output
processing modules associated with that button. For example; the EQ button will
toggle through the input GEQ and output PEQ modules when pressed multiple
times.
Prev Slide
Proceed
10
Index
Basic Navigation
Pressing the PREV PG (Previous Page) & NEXT PG (Next Page) buttons allow
you to navigate through the various pages within a module.
Prev Slide
Proceed
11
Index
Basic Navigation
The DATA ENCODER is your “SELECT” button when pressed in.
Prev Slide
Proceed
12
Index
Basic Navigation
Pressing the DATA ENCODER in will move the cursor on the currently selected
page.
Prev Slide
Proceed
13
Basic Navigation
Index
Turning the DATA ENCODER will change the selected parameter.
Back To Main Menu
Prev Slide
14
Index
Virtual DriveRack PA
Left Click on an item to learn more.
Back To Main Menu
15
Index
RTA Input Jack
This is the RTA INPUT jack. Connect the dbxRTA-M microphone to this
connector using a standard XLR microphone cable. This connection supplies 15
Volts of phantom power to the microphone.
Back To Virtual PA
16
Index
RTA Input Button
This is the RTA INPUT button. Pressing this button will engage the Auto EQ.
Back To Virtual PA
17
Index
LCD/Button Array
This is the LCD DISPLAY. This
display allows you to view the various
pages within the DriveRack PA.
This is the BUTTON ARRAY. Use
these buttons to navigate through the
DriveRack PA
Left Click on a BUTTON or TEXT in the LCD to learn more.
Back To Virtual PA
18
Preset #
Index
This shows the currently selected PROGRAM or PRESET #.
Note: There are USER and FACTORY presets. 1-25 are USER presets & can be
overwritten. Presets 26-50 are identical to 1-25 (from the factory), but are
FACTORY presets & cannot be overwritten.
Back To Virtual PA
19
Index
Preset Name
This is the NAME of the currently selected preset.
Note: If this area reads “Not Loaded”, you must press the SELECT button (DATA
ENCODER) in to load the selected preset.
Back To Virtual PA
20
Index
Input Configuration
These letters indicate how the inputs are configured. The “L” stands for LEFT &
the “R” stands for RIGHT.
Note: If there is an “M” here then the input is configured as “MONO”. This
means that a mono input was selected instead of stereo inputs in the System
Setup Wizard.
Back To Virtual PA
21
GEQ/PEQ
Index
These are the EQ modules. The “G”
is the input GRAPHIC EQ & the “P”
stands for the output PARAMETRIC
EQs.
This is the EQ button. Press this
button to enter the Graphic or
Parametric EQ modules.
Note: Pressing this button multiple
times will toggle through the input
GEQ & output PEQ modules.
Back To Buttons
More Info
22
GEQ (Graphic EQ)
Index
This is the input GEQ. It is used to help compensate for the coloration of the
room and provides a more tonally balanced sounding system within a venue.
Back To EQ
More Info
23
GEQ (Graphic EQ)
Index
This is the first page in the GEQ (Graphic EQ) module. The GEQ is the only
processor within the DriveRack PA that can be unlinked.
This displays
which INPUT you
have selected.
LR=Left & Right.
Here you can turn
the GEQ ON & OFF.
This GRAPH shows
the GEQ curve when
the EQ is set.
Here you can
FLATTEN and
RESTORE the GEQs
settings.
Prev Slide
Next Page
24
GEQ (Graphic EQ)
Index
This is the second page in the GEQ (Graphic EQ) module.
This displays
which INPUT you
have selected.
LR=Left & Right.
This GRAPH shows
the GEQ curve when
the EQ is set.
Here you can
select the
“FREQUENCY
CENTER” or BAND
that you would like
to edit.
Here you can adjust
the GAIN (boost or
cut) of the selected
frequency or band.
Prev Slide
Next Page
25
Index
PEQ (Parametric EQ)
These are the output PEQ modules. They are generally used to help flatten the
response of the loudspeaker drivers.
Prev Slide
More Info
26
Index
PEQ (Parametric EQ)
This is the first page in the PEQ (Parametric EQ) module.
This displays which
OUTPUT you have
selected.
This GRAPH shows
the PEQ curve when
the EQ is set.
Here you can turn
the PEQ ON & OFF.
Here you can
FLATTEN and
RESTORE the GEQs
settings.
Here you can select which
types of filters will be available
(LOW SHELF, HIGH SHELF,
BOTH or all BELL).
Prev Slide
Next Page
27
Index
PEQ (Parametric EQ)
This is the second page in the PEQ (Parametric EQ) module.
This displays which
OUTPUT you have
selected.
This GRAPH shows
the PEQ curve when
the EQ is set.
This displays which
BAND is selected.
This is
“FREQUENCY 1”.
Here you can
change the GAIN
(boost or cut) of
band 1.
Here you can adjust the “SLOPE” or
“Q” of the filter depending upon what
you selected on the first page.
“S”= Slope
“Q”=Width
Prev Slide
Next Page
28
Index
PEQ (Parametric EQ)
This is the third page in the PEQ (Parametric EQ) module.
This displays which
OUTPUT you have
selected.
This GRAPH shows
the PEQ curve when
the EQ is set.
This displays which
BAND is selected.
This is
“FREQUENCY 2”.
Here you can
change the GAIN
(boost or cut) of
band 2.
Here you can adjust the
“Q” of the filter.
“Q”=Width
Prev Slide
Next Page
29
Index
PEQ (Parametric EQ)
This is the fourth page in the PEQ (Parametric EQ) module.
This displays which
OUTPUT you have
selected.
This GRAPH shows
the PEQ curve when
the EQ is set.
This displays which
BAND is selected.
This is
“FREQUENCY 3”.
Here you can
change the GAIN
(boost or cut) of
band 3.
Back To EQ
Here you can adjust the “SLOPE” or
“Q” of the filter depending upon what
you selected on the first page.
“S”= Slope
“Q”=Width
Note: You will only
see this page when
editing the “High
Outputs”. This is
because the “ Mid”
& “Low” Output
PEQs have only 2
bands (“F1” & “F2”).
Prev Slide
30
Index
Feedback (AFS)
This is the FEEDBACK or AFS module.
Back To Buttons
This is the FEEDBACK button. Press
this button to enter the AFS
(Advanced Feedback Suppression)
module.
More Info
31
Feedback (AFS)
Index
This is the input AFS module. It is used to help control feedback in the system.
Back To AFS
More Info
32
Feedback (AFS)
Index
This is the first page in the FEEDBACK or AFS module.
Here you can
CLEAR all filters or
just the Live filters.
Here you can turn
the AFS ON & OFF.
This shows you how many FIXED VS
LIVE filters are allocated. It also
shows you how many filters are set.
Prev Slide
Next Page
33
Index
Feedback (AFS)
This is the second page in the FEEDBACK or AFS module.
Here you can select
whether AFS is in
LIVE or FIXED mode.
Here you can select
how wide or narrow
the notch filters will
be.
Speech=Wide
Music High=Narrow
This shows you how many FIXED VS
LIVE filters are allocated. It also
shows you how many filters are set.
Here you can select
how many filters are
ALLOCATED as Fixed.
Prev Slide
Next Page
34
Feedback (AFS)
Index
This is the third page in the FEEDBACK or AFS module.
Here you can turn the
Live Filter Lift ON &
OFF.
Here you can set
HOW LONG the Live
Filters will remain set
before they are lifted.
This shows you how many FIXED VS
LIVE filters are allocated. It also
shows you how many filters are set.
Back To AFS
Prev Slide
35
Index
Subharmonic Synth
This is the SUBHARMONIC SYNTH
module.
Back To Buttons
This is the SUBHARMONIC SYNTH
button. Press this button to enter the
Subharmonic Synth module.
More Info
36
Index
Subharmonic Synth
This is the input Subharmonic Synth module. It is used to add extremely low
frequencies to material that otherwise lacks these frequencies.
Back To Sub Synth
More Info
37
Index
Subharmonic Synth
This is the first page in the SUBHARMONIC SYNTH module.
Here you can turn the
Subharmonic Synth
ON & OFF.
Here you can set the
MASTER LEVEL of the
Subharmonic Synth
process.
Prev Slide
Next Page
38
Index
Subharmonic Synth
This is the second page in the SUBHARMONIC SYNTH module.
Here you can set the
LEVEL of the first
range of frequencies.
Here you can set the
LEVEL of the second
range of frequencies.
Back To Sub Synth
Prev Slide
39
Index
Compressor/Limiter
These are the Dynamics
(COMPRESSOR & LIMITER) modules.
This is the COMP/LIMITER button.
Press this button to enter the input
COMPRESSOR or output LIMITER
modules.
Note: Pressing this button multiple
times will toggle through the input
Compressor & output Limiter
modules.
Back To Buttons
More Info
40
Index
Compressor
This is the input Compressor module. It is used to lower the dynamic range of
the system. In other words, it brings louder signals down and softer signals up.
Back To Comp/Lim
More Info
41
Compressor
Index
This is the first page in the input COMPRESSOR module.
This is your
THRESHOLD
INDICATOR.
“-”=Below Threshold
“O”=In the Overeasy Range
“+”=Over the Threshold
This illustrates that
you are editing the
input “Left & Right”
“Compressor” module.
This is your GAIN
REDUCTION METER.
It shows how many
dB of compression is
taking place.
Here you can turn
the Compressor ON &
OFF.
Here you can turn
OVEREASY mode ON
& OFF. This is a
variable knee (VariKnee) ranging from
1-10.
Prev Slide
Next Page
42
Compressor
Index
This is the second page in the COMPRESSOR module.
This is your
THRESHOLD
INDICATOR.
“-”=Below Threshold
“O”=In the Overeasy Range
“+”=Over the Threshold
This illustrates that
you are editing the
input “Left & Right”
“Compressor” module.
Here you can set the RATIO. The
RATIO determines how much
compression will take place once the
Threshold is exceeded.
This is your GAIN
REDUCTION METER.
It shows how many
dB of compression is
taking place.
Here you can set
the THRESHOLD or at
what level the
Compressor will be
engaged.
Here you can adjust
the OUTPUT or
MAKE-UP gain of the
Compressor.
Prev Slide
Next Page
43
Index
Limiter
These are the output Limiter modules. They set a “ceiling” on the output level
and help protect speakers from being overdriven and amplifiers from clipping.
Prev Slide
More Info
44
Limiter
Index
This is the first (or high output) LIMITER module.
This is your
THRESHOLD
INDICATOR.
“-”=Below Threshold
“O”=In the Overeasy Range
“+”=Over the Threshold
This shows which
OUTPUTS you are
editing.
H=”Highs”
Here you can turn the
Limiter ON & OFF.
This is your GAIN
REDUCTION METER.
It shows how many
dB of limiting is taking
place.
Here you can turn
OVEREASY mode ON
& OFF. This is a
variable knee (VariKnee) ranging from
1-10.
Here you can set
the THRESHOLD of
when the Limiter will
be engaged.
Prev Slide
Next Page
45
Limiter
Index
This is the second (or mid output) LIMITER module. This page will only be shown
in a 3 Way system.
This is your
THRESHOLD
INDICATOR.
“-”=Below Threshold
“O”=In the Overeasy Range
“+”=Over the Threshold
This shows which
OUTPUTS you are
editing.
M=”Mids”
Here you can turn the
Limiter ON & OFF.
This is your GAIN
REDUCTION METER.
It shows how many
dB of limiting is taking
place.
Here you can turn
OVEREASY mode ON
& OFF. This is a
variable knee (VariKnee) ranging from
1-10.
Here you can set
the THRESHOLD of
when the Limiter will
be engaged.
Prev Slide
Next Page
46
Limiter
Index
This is the third (or low output) LIMITER module. This page will only be shown in
a 2 Way or 3 Way system.
This is your
THRESHOLD
INDICATOR.
“-”=Below Threshold
“O”=In the Overeasy Range
“+”=Over the Threshold
This shows which
OUTPUTS you are
editing.
L=”Lows”
Here you can turn the
Limiter ON & OFF.
Back To Comp/Lim
This is your GAIN
REDUCTION METER.
It shows how many
dB of limiting is taking
place.
Here you can turn
OVEREASY mode ON
& OFF. This is a
variable knee (VariKnee) ranging from
1-10.
Here you can set
the THRESHOLD of
when the Limiter will
be engaged.
Prev Slide
47
Index
Xover (Crossover)
This is the XOVER (Crossover)
module.
Back To Buttons
This is the XOVER button. Press this
button to enter the Crossover module.
More Info
48
Index
Xover (Crossover)
This is the Xover module. It is used to send the proper range of frequencies to
each loudspeaker driver.
Back To X-Over
More Info
49
Xover (Crossover)
Index
This is the first page in the XOVER module. This page is for editing the HIGH
PASS filter on the “Low Outputs”. The low outputs will only be available in a 2Way or 3-Way configuration.
This shows which
OUTPUTS you are
editing.
L=”Lows”
This is the crossover
point which is edited
on this page.
This is the crossover
FREQUENCY for the
high pass on the low
outputs.
This GRAPH shows
you how the
crossover points are
set a at a glance.
This is the OUTPUT
GAIN for the low
outputs.
This is the filter
type and slope
selected for the high
pass filter for the low
outputs.
Prev Slide
Next Page
50
Xover (Crossover)
Index
This is the second page in the XOVER module. This page is for editing the LOW
PASS filter on the “Low Outputs”. The low outputs will only be available in a 2Way or 3-Way configuration.
This shows which
OUTPUTS you are
editing.
L=”Lows”
This is the crossover
point which is edited
on this page.
This is the crossover
FREQUENCY for the
low pass on the low
outputs.
This GRAPH shows
you how the
crossover points are
set a at a glance.
This is the filter
type and slope
selected for the low
pass filter for the low
outputs.
Prev Slide
Next Page
51
Xover (Crossover)
Index
This is the third page in the XOVER module. This page is for editing the HIGH
PASS filter on the “Mid Outputs”. The mid outputs will only be available in a 3Way configuration.
This shows which
OUTPUTS you are
editing.
M=”Mids”
This is the crossover
point which is edited
on this page.
This is the crossover
FREQUENCY for the
high pass on the mid
outputs.
This GRAPH shows
you how the
crossover points are
set a at a glance.
This is the OUTPUT
GAIN for the mid
outputs.
This is the filter
type and slope
selected for the high
pass filter for the mid
outputs.
Prev Slide
Next Page
52
Xover (Crossover)
Index
This is the fourth page in the XOVER module. This page is for editing the LOW
PASS filter on the “Mid Outputs”. The mid outputs will only be available in a 3Way configuration.
This shows which
OUTPUTS you are
editing.
M=”Mids”
This is the crossover
point which is edited
on this page.
This is the crossover
FREQUENCY for the
low pass on the mid
outputs.
This GRAPH shows
you how the
crossover points are
set a at a glance.
This is the filter
type and slope
selected for the low
pass filter for the mid
outputs.
Prev Slide
Next Page
53
Xover (Crossover)
Index
This is the fifth page in the XOVER module. This page is for editing the HIGH
PASS filter on the “High Outputs”.
This shows which
OUTPUTS you are
editing.
H=”Highs”
This is the crossover
point which is edited
on this page.
This is the crossover
FREQUENCY for the
high pass on the high
outputs.
Back To X-Over
This GRAPH shows
you how the
crossover points are
set a at a glance.
This is the OUTPUT
GAIN for the high
outputs.
This is the filter
type and slope
selected for the high
pass filter for the high
outputs.
Prev Slide
54
Active Outputs
Index
These letters indicate which OUTPUTS are active and how they are configured.
LH=Left High
RH=Right High
LM=Left Mid
RM=Right Mid
LL=Left Low
RL=Right Low
Note: You may see an “ML” rather than an “LL & “RL” for the subwoofer
outputs. This means that a mono subwoofer was selected rather than stereo
subs in the System Setup Wizard.
Back To Virtual PA
55
Previous Page
Index
This is the PREV PG (Previous Page) button. Press this button to go back to the
previous page within the currently selected Last or module.
Back To Buttons
56
Index
Next Page
This is the NEXT PG (Next Page) button. Press this button to go to the next page
within the currently selected Last or module.
Back To Buttons
57
Delay
Index
This is the DELAY button. Press this button to enter the Delay module.
Note: Pressing this button multiple times will toggle through the Delay modules
for the various active outputs.
Back To Buttons
More Info
58
Delay
Index
These are the output Delay modules. They are used to time align the drivers.
These delays are suitable for driver alignment but not delay towers (10 ms max).
Back To Delay
More Info
59
Delay
Index
This is the first (or high output) DELAY module.
This shows which
OUTPUTS you are
editing.
Here you can turn
the delay module ON &
OFF.
H=”Highs”
Here you can change
the delay TIME in
coarse or fine
increments. Up to 10
ms is available.
Here you select
whether you want to
set the time in
MILLISECONDS, FEET,
or METERS.
Prev Slide
Next Page
60
Delay
Index
This is the second (or mid output) DELAY module. This page will only be available
in a 3 Way setup.
This shows which
OUTPUTS you are
editing.
Here you can turn
the delay module ON &
OFF.
M=”Mids”
Here you can change
the delay TIME in
coarse or fine
increments. Up to 10
ms is available.
Here you select
whether you want to
set the time in
MILLISECONDS, FEET,
or METERS.
Prev Slide
Next Page
61
Delay
Index
This is the third (or low output) DELAY module. This page will only be available in
a 2 Way or 3 Way setup.
This shows which
OUTPUTS you are
editing.
Here you can turn
the delay module ON &
OFF.
L=”Lows”
Here you can change
the delay TIME in
coarse or fine
increments. Up to 10
ms is available.
Back To Delay
Here you select
whether you want to
set the time in
MILLISECONDS, FEET,
or METERS.
Prev Slide
62
Index
Program
This is the PROGRAM button. Think of this button as an “Exit” button. It will
take you back to the main program screen, backing you out of any page that you
are currently viewing or editing.
Note: The only Last that will render this button inactive is the Auto EQ. You must
first depress the RTA Input button before you can exit the Auto EQ.
Back To Buttons
63
Utility
Index
This is the UTILITY button. Press this button to enter the Utility Last.
WARNING! Do not press and hold the UTILITY button. doing so will take you to a
debug/calibration Last. Changing these parameters will result in miscalibration of the
DriveRack PA. This would require the device to be re-calibrated at the main factory. If
you accidentally enter this Last, keep pressing the NEXT PG button until the display
reads “Loading...”. You should now be back to the main program screen, while
leaving all calibration parameters unchanged.
Back To Buttons
More Info
64
Utility
Index
This is the UTILITY page.
Here you can adjust
the CONTRAST of the
LCD display.
Here you can select
whether the GEQ
(Graphic EQ) or RTA
(Real Time Analyzer) is
shown when running
the Auto EQ.
Here you can turn
the SALES BANNER
On & Off.
Back To Utility
65
Store
Index
This is the STORE button. Press this button to store your preset.
Note: You must press this button a total of three times to actually store the preset.
•1st Press-Here you can name the preset.
•2nd Press-Here you can select which user location to store the preset to.
•3rd Press-This actually stores the preset.
Back To Buttons
More Info
66
Store
Index
The first press of the Store button allows you to NAME the preset.
Name the PRESET.
•Press the SELECT button (DATA ENCODER) in to toggle between the characters which include
upper case letters, lower case letters, numerals, & blank space (or punctuation & symbols).
•Turn the DATA ENCODER to scroll through the characters.
• Use the NEXT PG & PREV PG buttons to highlight another character to edit.
Back To Store
Next Page
67
Store
Index
This is the second page in the Store menu. Here you can select the LOCATION
to store the preset to. In other words, which USER PRESET you would like to
overwrite.
Select the LOCATION
to store the preset to.
Just turn the DATA ENCODER to select the location.
Prev Slide
Next Page
68
Store
Index
The third press of the STORE button actually stores your preset with the name
that you selected & at the location which you selected. The preset location that
you stored to will automatically be loaded.
The preset (or program)
is being STORED to
memory.
Back To Store
Prev Slide
69
Wizard
Index
This is the WIZARD button. Press this button to enter the Wizard.
Back To Buttons
More Info
70
Wizard
Index
This is the WIZARD menu. Here you can enter the SYSTEM SETUP WIZARD
(step 1), AUTO EQ WIZARD (step 2), or AFS WIZARD (step 3).
Select the SYSTEM
SETUP WIZARD.
Select the AUTO EQ
WIZARD.
Select the AFS
WIZARD.
Just turn the DATA ENCODER to make the selection.
Then press the NEXT PG button to proceed.
Back To Wizard
71
Index
Data Encoder
This is the DATA ENCODER. Turning it will change the currently selected
parameter. It is also the SELECT button when pressed in. Pressing it in will move
the arrow (cursor) in the display. In other words it allows you to “Select” the
parameter that you would like to edit within the currently selected page then turn
the DATA ENCODER to change that parameter.
Back To Virtual PA
72
Input Meters
Index
These are the INPUT METERS measured using the dBu scale. These meters
show the level of the audio that is driving the input stage of the DriveRack PA.
Note: The +20 (red) LEDs at the top of the LED meters are your clip indicators.
Back To Virtual PA
73
Index
Limiter Threshold LEDs
These are the OUTPUT LIMITER THRESHOLD indicators. They give you a visual
indication when the output limiters are engaged.
Note: These LEDs do not indicate clipping. The +20 (red) LEDs at the top of the
meters are the clip indicators.
Back To Virtual PA
74
Output Meters
Index
These are the OUTPUT METERS measured using the dBu scale. These meters
show the level of the audio that is driving the output stage of the DriveRack PA.
Note: The two far left meters correlate to the “Low” outputs, the two in the
middle are for the “Mid” outputs & the two on the right are for the “High”
outputs. The +20 (red) LEDs at the top of the meters are your clip indicators.
Back To Virtual PA
75
Power Switch
Index
This is the POWER SWITCH. This turns the DriveRack PA on & off.
Note: Always remember to turn your amps on last and off first.
Back To Virtual PA
76
Index
Power Receptacle
This is the POWER RECEPTACLE. Plug the AC cable in here.
Note: Make sure the text below the receptacle matches the voltage in your
Country. If it does not, do not plug the unit in. There are two different Voltage
models. The US/JA model operates at 100-120 Volts. The EU/UK model operates
at 220-240 Volts. If you suspect that you may have the wrong model, please
contact the dealer that you purchased the unit from or dbx Technical Support.
Back To Virtual PA
77
Index
Low Output Jacks
These are the LOW OUTPUT jacks. Connect these jacks to the subwoofers
amplifier or low frequency drivers. These are the only outputs that can be mono
summed within the DriveRack PA.
Note: When a “Mono” subwoofer is selected in the System Setup Wizard, a
mono summed signal will be fed to both the LEFT and RIGHT LOW OUTPUTS. It
is also possible to send a full range signal out of these outputs if needed. Please
see the “Advanced Configurations” section for more information.
Back To Virtual PA
78
Mid Output Jacks
Index
These are the MID OUTPUT jacks. Connect these jacks to the mid frequency
drivers amplifier when using a 3-Way system.
Note: It is possible to make these jacks output a full range signal.
Back To Virtual PA
79
Index
High Output Jacks
These are the HIGH OUTPUT jacks. Connect these jacks to the high frequency
drivers amplifier in a 2-Way or 3-Way system or the amplifier for a pair of full
range speakers in a passive or powered full range system.
Back To Virtual PA
80
Index
Operating Level Switch
This is the NOMINAL OPERATING LEVEL switch. This should be set to match
the operating level of the device that is plugged into the DriveRack’s inputs (this
is typically a mixer).
Note: The selections for the nominal operating level are +4 dBu and -10 dBV. If
you are unsure what the operating level of your mixer is, please contact the
mixer manufacturer. Also, see the gain structure section in the “Setup” section of
this guide.
Back To Virtual PA
81
Input Jacks
Index
These are the INPUT jacks. They have a selectable nominal operating level of
+4 dBu or -10 dBV. Connect these jacks to the device pre DriveRack (typically a
mixer).
Back To Virtual PA
82
Pin 1 Lift Switch
Index
This is the PIN 1 LIFT switch. If you are having problems with ground loops (i.e.
hum), try pressing this switch in. This will break the connection between the
ground pin in the cable and the input jacks.
Back To Virtual PA
83
Index
•AFS
•AFS Wizard
•Auto EQ Wizard
•Auto EQ Plot
•Block Diagram
•Button Array
•Comp/Limiter Button
•Compressor
•Crossover
•Cursor
•Data Encoder
•Delay
•Delay Button
•EQ Button
•Feedback Button
•GEQ
•High Output Jacks
•Input Configuration
•Input Jacks
•Input Meters
•LCD Contrast
•LCD Display
•Limiter
•Limiter Threshold LEDs
•Low Output Jacks
•Mid Output Jacks
•Navigation
•Next Page Button
•Operating Level Switch
•Output Meters
•Overview
•PEQ
•Pin 1 Lift Switch
•Power Receptacle
•Power Switch
•Preset Name
•Preset #
•Previous Page Button
•Program Button
•RTA Input Button
•RTA Input Jack
•Store Button
•Subharmonic Button
•Subharmonic Synthesis
•System Diagram
•System Setup Wizard
•Threshold LEDs
•Utility Button
•Wizard Button
•Xover
•Xover Button
Back To Main Menu
84