AudioControl DQT Specifications

AudioControl DQT Specifications
Digital
Fusion
TM
Mobile Audio
DXS
tm
24 dB Stereo 3-way
Digital Crossover
Owner’s Enjoyment Manual
AudioControl
®
22410 70th Avenue West • Mountlake Terrace, WA 98043 USA
Phone 425-775-8461 • Fax 425-778-3166
www.audiocontrol.com
AudioControl
This page was intentionally left bland
Owner’s Enjoyment Manual
Digital
Fusion
Table of Contents
Congratulations! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Key Features of the DXS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Tour de Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A Brief Tour of the DXS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installing the DXS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Example Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Level Matching Your System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Setting the Crossover Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Crossover Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cool Crossover Tricks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
The Inside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Questions and Answers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DXS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Owner’s Enjoyment Manual
™
AudioControl
Owner’s Enjoyment Manual
Digital
Fusion
Congratulations!
You have just purchased one of the most innovative mobile audio products available - The DXS
Digital Crossover. This Digital Fusion product from
AudioControl will help make your stereo system
sound it’s best. By combining over 25 years of
experience designing Bullet-Proof audio components with the latest digital technologies, AudioControl has created a fusion of knowledge and
power. You benefit from Digital Fusion with this
kick-butt car audio crossover.
IMPORTANT
For the best product performance and the lowest
use of a pain reliever; nothing is better than a
professional system installation. Your authorized
AudioControl Performance Match autosound
dealer has the training and equipment to take care
of the job quickly and to get the best sound out of
your system. If you are a solid do-it-yourselfer then
this manual should give you all the information
you need to successfully make music with the
DXS. Happy listening.
Please take a moment to chill out, reflect on
things and read this manual before starting with
the installation.
Key Features of the DXS
• Digital Crossover Frequency Control
• Cool blue digital display
• Sharp 24dB/Octave Electronic Crossover
• Linkwitz-Riley Alignment For Superior
Sound Imaging
• Programmable Frequency Match Filter
• Optimum output level indicator LED’s
• Selectable power supply ground isolation
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AudioControl
Tour de Features
Digital Control
The DXS gives you the power to control your
mobile sound system with the unerring accuracy
of digital. The bright blue LCD display keeps you
fully informed on your crossover’s settings. The
current crossover frequency settings are available
at a glance. A dual-level brightness adjustment on
the display backlight keeps that blue glow just
right.
Programmable 24dB/Octave Threeway Crossover
With digital programmability, the three-way
electronic crossover in the DXS easily configures
to almost any high-performance mobile audio
system. By simply pressing a few buttons, you
select almost any crossover frequency imaginable.
The 24dB/Octave Linkwitz-Riley (a couple of real
nice audio engineers) design is normally reserved
for the best home and professional systems, but
now this state-of-the-art crossover is yours also.
Programmable Frequency Match
(PFM) Filter
This programmable low cut filter allows the
system designer to custom tune the bass response
of the speaker system. Smaller woofers can be
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protected against the voice-coil-charring bass they
are too small to reproduce. Tuned (Ported)
subwoofers benefit by having the frequencies
below their tuning cut off to reduce distortion
and save system power.
A BRIEF TOUR OF THE DXS
The Outside
¶ Digital Status Display – A window into
the digital world of the DXS. This luminous blue
LCD display shows all of the current crossover and
subsonic filter settings. The dual-level brightness
adjustment lets you to set the display to match
your tastes.
· Digital Control Buttons – These three
buttons give you the power of digital at your
fingertips. All of the crossover frequency adjustments are done with these controls.
¸ Output Level Controls - These variable
gain controls adjust the high pass and low pass
output signal voltage levels independently. This
enables optimum signal matching for superior
low-noise performance.
¹ Output Voltage Indicators – 1, 2 and 5
Volts: Shows the audio output signal levels at the
RCA jacks. Use these to match the output of the
Owner’s Enjoyment Manual
Digital
Fusion
DXS to your amplifiers. Don’t guess on this spec.,
check your amp’s owner’s manual to be certain.
º Input Maximized Indicator - Shows
when the Input signal voltage levels are within
3dB of clipping. In normal use, this display should
flicker occasionally.
» Power Connector - A wonderful, removable connector that allows you to hook up all the
power wires in the convenience of daylight and
then plug them into the DXS in the dark recesses
of your trunk.
·
¶
DXS Digital Crossover
By AudioControl
¸
¹
º
Owner’s Enjoyment Manual
»
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AudioControl
INSTALLING THE DXS
The Most Important Instruction of all
FILL OUT AND SEND IN YOUR WARRANTY
CARD! Also, save your invoice or sales slip as proof
of purchase. These actions will protect your
investment and help prove that you really owned
such a great piece of audio gear in case somebody
takes a liking to it while you’re tanning in South
Beach.
INSTALLATION PRECAUTIONS
• Do not mount the DXS where it will be
exposed to out side elements or extreme
temperatures. Avoid areas of severe vibration
or shock. The front bumper is right out.
• Use high quality audio cables.
• Plan on a single-point (star ground) scheme
so all components, including the head unit,
connect to a common ground point. Use no
less than 14 gauge wire for the
ground connections.
• Where you want to mount the DXS, make
certain that there are no fuel lines, brake
lines, electrical wires or anything else that
you don’t want to run a drill bit through.
That includes things on the back side of that
floor panel you’re about to punch a hole in.
• Make certain the DXS is firmly mounted
with screws so it won’t come flying off the
next time you blast over a speed bump.
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Owner’s Enjoyment Manual
Digital
Fusion
EXAMPLE SYSTEMS:
Simple BiAmp
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AudioControl
Triamping with the DXS
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Owner’s Enjoyment Manual
Digital
Fusion
Equalized with a DQT
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AudioControl
A kitchen sink and everything system
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Owner’s Enjoyment Manual
Digital
Fusion
USING THE DXS
STEREO DIGITAL CROSSOVER
Now is time for the rubber to meet the road.
There are a couple steps to get the best performance out of your DXS crossover. First, level
match your system for the lowest system noise
and Second, set your crossover frequencies. This
will get the most out of your total mobile audio
system.
Level Matching Your System
Properly matching the signal levels in your
system will result in a much better signal to noise
ratio and a quieter system. There are two sets of
indicator LED’s on the DXS to assist with this task:
The Input Maximized LED and the Output Voltage LED’s. These display simplify the task and
reduces the need for separate test equipment.
1. Turn the head unit volume to 90% of maximum.
2. If you have a line driver or preamp in your
system, adjust the gain on that until the Input
Maximized LED on the DXS is just flickering.
3. Adjust the amplifier gains to their minimum
settings. Don’t worry, this doesn’t mean that
you won’t be able to get the full power output
from your amplifier.
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4. For this step, you need to know the input
sensitivity of your amplifiers. This will usually
be shown as a range; go for the highest signal
voltage possible that your amplifier will accept.
Don’t confuse this with the operating power
voltage input. Once you know this, adjust the
Output Level controls on the DXS to show the
output voltage that matches the input sensitivity of your amplifiers.
5. Now you’ve got a Level Matched system and
you’re ready to set the crossover frequencies.
Setting the Crossover
Frequencies
The power of Digital Fusion means you have
total control over the crossover frequency adjustments in the DXS. With the press of a button, the
active frequency dividing network is at your call.
We often receive calls asking us about what crossover frequency to use. The best answer is: Check
with your speaker manufacturer. They know
where the drivers will perform their best. As a
general rule, use these starting points:
6” drivers ...... 80-100Hz
4” drivers ...... 180-200Hz
5” drivers ...... 120-150Hz
Owner’s Enjoyment Manual
1” Tweeter ... 2500-4000Hz
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AudioControl
The DXS menus are very simple to navigate.
Here’s how…
Digital Fusion
By AudioControl(r)
LCD display and control buttons
Crossover response curve
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Owner’s Enjoyment Manual
Digital
Fusion
The Digital Display shows the current crossover
and subsonic filter frequency settings. These are
the points where the subwoofer output begins,
where the subwoofer and midrange crossover, and
where the midrange and highpass outputs crossover.
Setting the
Crossover Frequencies
1. Press and hold the SELECT button to enter the
adjust mode. One of the crossover frequencies
will begin to flash.
Cool Crossover Tricks
With the incredible flexibility of the digital
controls in the DXS you get to be creative using
your crossover. Since the crossover frequency
settings in the DXS have a very wide adjustment
range, it is simple to create an under-lapped 2-way
crossover. Just use the Highpass and Lowpass
outputs of the DXS
and set two crossover
frequencies where you
want to put a gap in
the system response.
2. Press the SELECT button to move the cursor to
the crossover point you want to adjust.
3. The UP and DOWN buttons adjust the frequency
you have highlighted.
4. The DXS will return to the Normal mode about
30 seconds after you quit pushing buttons.
Connection Drawing – 2 –way Crossover
Crossover Point
PFM
20Hz
Cursor
LOW/MID
100Hz
MID/HI
250Hz
Frequency Setting
Frequency response graph
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AudioControl
The Inside
Ground Isolation Selector - Allows the
installer to change the power supply ground
isolation for different systems. This is shipped in
the fully isolated position from the factory. The
other selections can help if you have a ground
noise in the system that doesn’t seem to want to
go away.
Balanced Input Selector – This jumper
changes the input circuitry from balanced mode
to unbalanced. As a general rule, the full ground
and noise isolation of the balanced mode works
best, but some source units prefer a hard audio
ground on the RCA cables.
Setting the Display Brightness
In this mode, you have the ability to select
between two levels of brightness for the display on
your DXS. To access this menu, press and hold
both the SELECT and UP ARROW buttons. Using
the left and right navigation buttons, toggle back
and forth between “Bright” and “Dim” and stop
on the level of lighting you are most comfortable
with you. Tap the “SELECT” button and your last
display brightness setting will be retained as you
move on to the next mode.
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Mode: Display
Display
Bright
Owner’s Enjoyment Manual
Dim
Digital
Fusion
Questions and Answers
Q
My head unit doesn’t have balanced outputs; can I
use the DXS with balanced inputs?
• The balanced-differential inputs on the DXS
help isolate ground loops and minimize cable
noise pickup using standard RCA cables. This
feature still works even if the head unit doesn’t
have balanced outputs. Sometimes the head unit
requires a grounded audio connection to function
properly, in this case change the input mode on
the DXS to Unbalanced.
Q
Q
Why don’t the Up and Down adjustment buttons
work?
• Make certain the DXS is in the ADJUST mode
by pressing and holding the SELECT button until
one of the frequencies is highlighted.
I have engine noise in the speakers.
• Unplug the inputs (not the outputs) of the
DXS. If the noise is still present, try changing the
ground isolation jumper inside the DXS to another setting. If the noise stops, check further up
the signal path between the DXS and the head
unit.
Q
There is a thumping sound coming from my system.
• Unplug the inputs (not the outputs) of the
DXS. If the trouble stops, try changing the input
mode to Unbalanced.
My amplifier says the audio ground is floating.
• The audio ground on the DXS is adjustable.
The factory setting is fully isolated for the best
ground loop performance in most systems. If you
amp insists on having an audio ground, simply set
the jumper inside the DXS to 200 ohms or
Ground, whichever works best for you.
Q
Why can’t I store my crossover settings into
memory?
• The DXS doesn’t have multiple memories for
settings. The crossover frequency adjustments are
best set to match your speakers. Use an equalizer
or the tone controls on your head unit to adjust
for different music or performance needs.
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AudioControl
and now a word from the legal department...
The WARRANTY
People are scared of warranties. Lots of fine print.
Months of waiting around. Well, fear no more,
this warranty is designed to make you rave about
us to your friends. It’s a warranty that looks out for
you and helps you resist the temptation to have
your friend, “Who’s good with electronics.”, try to
repair your AudioControl product. So go ahead,
read this warranty, then take a few days to enjoy
your new DXS before sending in the warranty
card and comments.
“Conditional” doesn’t mean anything ominous.
The Federal Trade Commission tells all manufacturers to use the term to indicate that certain
conditions have to be met before they’ll honor
the warranty. If you meet all of these conditions,
we will warrant all materials and workmanship
on the DXS for one year from the date you bought
it, and we will fix or replace it, at our option,
during that time. This warranty period is extended to FIVE years when the product is installed
by an authorized AudioControl Performance
Match autosound dealer in the United States.
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Here are the conditional conditions:
1. You have to fill out the warranty card and send
it to us within 15 days after purchasing the DXS.
2. You must keep your sales receipt for proof of
purchase showing when and from whom the
unit was bought. We’re not the only one’s who
require this, so it’s a good habit to get into with
any major purchase.
3. Your DXS must have originally been purchased
from an authorized AudioControl dealer. You
do not have to be the original owner, but you
do need a copy of the original sales slip.
4. You cannot let anybody who isn’t: (A) the
AudioControl factory; (B) an authorized service
center; or (C) somebody authorized in writing
by AudioControl to service your DXS. If anyone
other than (A), (B) or (C) messes with your DXS,
that voids your warranty.
5. The warranty is also void if the serial number is
altered or removed, or if the DXS has been used
improperly. Now that sounds like a big loophole, but here is all we mean by it.
Unwarranted abuse is: (A) physical damage
(don’t use the DXS for a car jack); (B) improper
connections (120 volts into the power jack can fry
Owner’s Enjoyment Manual
Digital
Fusion
the poor thing); (C) sadistic things. This is the best
mobile product we know how to build, but if you
mount it to the front bumper of your car, something will go wrong.
Assuming you conform to 1 through 5, and it
really isn’t all that hard to do, we get the option of
fixing your old unit or replacing it with a new
one.
Legalese Section
This is the only warranty given by AudioControl. This warranty gives you specific legal rights
that vary from state to state. Promises of how well
your DXS will perform are not implied by this
warranty. Other than what we have covered in
this warranty, we have no obligation, express or
implied. Also, we will not be obligated for direct or
indirect consequential damage to your system
caused by hooking up the AudioControl DXS.
Failure to send in a properly completed warranty card negates any service claims.
Owner’s Enjoyment Manual
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AudioControl
DXS Specifications
All specifications are measured at 14.4 VDC (standard automotive voltage). As
technology advances, AudioControl reserves the right to continuously change our
specifications, like our weather . . . although we are working on it.
Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-20 kHz ±1 dB
Total harmonic distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.007%
Signal to Noise ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 dB
Maximum output level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 Vrms
Crossover slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 dB/Octave
Crossover type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-Way Linkwitz-Riley
Programmable crossover frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 to 4500 Hz
PFM filter slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 dB/Octave
PFM filter frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 to 150 Hz
Input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20K
Ω
Output impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150Ω
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated PWM DC/DC converter
Power draw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mA
Recommended fuse rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Amp
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2”h x 9”w x 7”d
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 lbs
Country of origin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . USA
© 2002, AudioControl, AudioControl is a division of Electronic Engineering and Manufacturing, Inc. USA.
All rights reserved
AudioControl, Digital Fusion, Making Good Stereo Sound Better, DXS are all trademarks of Electronic
Engineering and Manufacturing, Inc.
Considering where we live, this manual was written, designed,printed and stuffed into a cool box with a
really hot product on a grey, misty day.
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Owner’s Enjoyment Manual
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