TM
CPA 130
Power Amplifier
Operation Manual
Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. (503) 641-7287 www.biamp.com an affiliate of Rauland-Borg Corp.
blank
print update
June 17, 2002
TABLE OF
CONTENTS
Front Panel
Rear Panel
Precautions
Internal Modifications
Specifications
Block Diagram
Warranty
CPA130
pg. 2
INTRODUCTION
CPA130 dual channel power amplifiers are designed to supply reliable service in permanent installations. CPA130 amplifiers have complete short-circuit and thermal pg. 3 pg. 4 protection with automatic reset. Barrier strip input and 5-way binding post output connectors provide trouble free, dependable connections. CPA130 amplifiers are passively cooled for quiet operation, without fan noise or filter maintenance. CPA130 amplifiers carry a five-year warranty. pg. 5 pg. 6 pg. 7
CPA130 features include:
♦ balanced inputs on barrier strip terminals
♦ 65 watts/channel @ 4 ohms (stereo)
♦ 40 watts/channel @ 8 ohms (stereo)
♦ 130 watts @ 8 ohms (mono bridge)
♦ peak indicators on each channel
♦ detented level controls (front or rear mounting)
♦ complete short-circuit and thermal protection
♦ turn-on muting to prevent "thumping"
♦ selectable stereo or mono bridge operation
♦ internal jumpers select HPF (18dB/octave @ 180Hz)
♦ passively cooled (no fan noise or maintenance)
♦ optional distribution autoformers (rear panel mounting)
♦ covered by Biamp Systems' five-year warranty
1
FRONT PANEL
peak
1
peak
2
CPA130
level level
Channel Peak Indicators: These red LED indicators will light when their respective channel amplifiers have reached maximum output.
To avoid clipping distortion, and to protect speakers from being damaged, reduce the input level until the Peak Indicator no longer lights.
Channel Level Control Mounting Holes: These holes are provided for optional front panel mounting of the channel level controls (see
Internal Modifications: Front Panel Level Controls on page 5).
Power Indicator: This green LED indicator will light when AC power is applied to the unit (see Precautions on page 4).
AC Power Switch: This switch applies AC power to the unit (see Precautions on page 4).
2
REAR PANEL
level 2
+ input 2
--gnd + input 1
--gnd level 1
BIAMP SYSTEMS
PORTLAND,OREGON
an affiliate of
Rauland-Borg Corp
115V: 3A SB
230V: 1.5A SB output 2 output 1 stereo mono bridge
MADE IN U.S.A.
USE ONLY WITH
250V FUSE
110V
115/230 VAC
50/60 Hz
300 Watts max
--+ + ---
Autoformer Mounting Holes: These holes are for mounting of optional autoformers to the rear panel of the CPA130. Autoformers allow the CPA130 to be used to drive 25V, 70V, or 100V distributed speaker systems (see 5-Way Speaker Binding Posts below).
AC Power Entrance: This receptacle accepts the detachable AC Power Cord. The AC Power Cord is for connection to three-prong grounded AC outlets. CAUTION: Do not remove or defeat the ground prong on the AC Power Cord, as this constitutes a shock hazard.
The Fuse Clip may be removed by first detaching the AC Power Cord, then prying the Fuse Clip out from above, using a flat-blade screwdriver in the notch provided. The Fuse Clip contains both the standard fuse and an alternate fuse. The standard fuse is held in the clip, and becomes the actual AC fuse when the Fuse Clip is installed. Replace the standard fuse only with the same value and type (3A
SB for 110 VAC operation or 1.5A SB for 240 VAC operation). The alternate fuse, held in a drawer inside the Fuse Clip, is provided only for use at the alternate operational voltage setting. If it is necessary to change the operational voltage, first slide the voltage selector out of the left side of the Fuse Clip. Turn the voltage selector over, and slide it back into the Fuse Clip, making sure the desired voltage selection is visible through the voltage window. Then change the standard fuse value (3A SB for "110V" or 1.5A SB for "240V"), before re-installing the Fuse Clip.
Channel Level Controls: These controls adjust the input signal level for each channel. After setting appropriate levels at the signal source, then adjust the Channel Level Controls for the desired output volume from the CPA130. In mono-bridge mode, Channel 1 becomes the active input and Channel 2 input is inactive. As an option, the Channel Level Controls may be mounted to the CPA130 front panel (see Internal Modifications: Front Panel Level Controls on page 5).
Input Barrier Strip: These barrier strip screw terminals are for connection of line-level input signals to the channels. For balanced inputs, connect High to (+), Low to (-), and Ground to (gnd). For unbalanced inputs, connect High to (+) and Ground to both (-) & (gnd). In monobridge mode, Channel 1 becomes the active input and the Channel 2 input is inactive.
5-Way Speaker Binding Posts: These 5-way binding posts are for connection of speaker loads to the CPA130. In stereo mode, the red
(+) terminal of each channel is for connection to speaker positive, and the black (-) terminal for each channel is for connection to speaker negative. The CPA130 will deliver up to 65 Watts per channel into 4 ohm minimum loads. In mono-bridge mode, the red (+) terminal of
Channel 1 is for connection to speaker positive, and the red (+) terminal of Channel 2 is for connection to speaker negative. The CPA130 will deliver up to 130 Watts mono-bridged into an 8 ohm minimum load. Autoformers are available from Biamp Systems, which allow the
CPA130 to be used to drive 25V, 70V, or 100V distributed speaker systems (see Internal Modifications: High-Pass Filter on page 5). When using the CPA130 in stereo mode, the appropriate autoformer for each channel is a DT-2A (#909-0025-00). When using the CPA130 in mono-bridge mode, the appropriate autoformer is a DT-3A (#909-0029-00).
Mono-Bridge Switch: When depressed, this switch selects the mono-bridge mode of operation. In mono-bridge mode, Channel 1 becomes the active input and the Channel 2 input is inactive. The red (+) speaker terminal of Channel 1 is for connection to speaker positive, and the red (+) speaker terminal of Channel 2 is for connection to speaker negative. The CPA130 will deliver up to 130 Watts mono-bridged into an 8 ohm minimum load.
3
PRECAUTIONS
Be sure that power to the CPA130 is turned off when making all connections. High voltages can be present at the speaker terminals, and static pops or broken ground connections on cables can cause speaker damage.
Use speaker wire of sufficient gauge to prevent power loss and damping factor reduction. Larger size wire has a lower resistance and permits longer cable runs. Use 16 or 18 gauge wire for cable runs up to 20 feet. For runs 20~80 feet, use 14 gauge wire. For runs longer than 80 feet, use 10 or 12 gauge wire.
Check the AC voltage before connecting the AC cord. The voltage selector is indicated on the rear panel at the power cord receptacle.
The CPA130 is shipped from the factory set for 110VAC operation. If it is necessary to set the AC voltage selector for 240VAC operation, be sure to replace the AC fuse with the appropriate value.
The High-Pass Filters must be enabled whenever using the CPA130 for driving distributed speaker systems (see Internal Modifications:
High-Pass Filter on page 5).
Never connect the red (+) speaker binding posts directly together. This can result in internal damage to the amplifier.
Before turning power on, set the CPA130 level controls to the fully counter-clockwise (off) position.
The CPA130 is designed to be installed in a standard 19" equipment rack. The amplifiers have cooling vents on both the top and bottom panels. Do not block the cooling vents in any way. When mounting the CPA130 in a rack, leave at least one rack-space above and below the amplifier to allow proper air flow. Do not use a CPA 130 in a closed rack. In situations with high ambient temperatures, particularly where multiple amplifiers are mounted in the same rack, it may be necessary to use fans to cool the rack. Best results are attained if the fans blow cool air in from the bottom of the rack, up through the amplifiers, expelling the heated air at the top.
If the green LED indicator next to the power switch does not light when the power switch is turned on, turn the power switch off and check the AC power cord connections. If the power cord connections are complete, but the indicator still does not light, disconnect the CPA130 from AC power and check the AC fuse. If the fuse needs to be replaced, use the same value and type fuse only. If the AC fuse continues to fail, the amplifier may require service.
Once power is turned on, slowly advance the level controls clockwise. If no sound is heard, turn the level controls back to their original counter-clockwise position and check to confirm there is an input signal. Also check for proper wiring at all input and output connections, and verify that the cables being used are undamaged and are in good condition.
If the CPA130 should require service, please contact Biamp Systems Customer Service at 1-800-826-1457 or (503) 641-7287.
4
INTERNAL MODIFICATIONS
NOTE: Disconnect the CPA130 from the AC outlet. Remove the top panel to access internal modifications. The diagram below shows the
printed circuit board (PCB) and components as they appear on each amplifier channel module.
FILTER
IN
OUT
High-Pass Filter: This two-position jumper strap enables or disables a 18dB/octave 180Hz High-Pass Filter for that channel of the amplifier. When the strap is in the "IN" (up) position, the High-Pass Filter is enabled. When the strap is in the "OUT" (down) position, the
High-Pass Filter is disabled. The High-Pass Filters must be enabled whenever the CPA130 is used for driving distributed speaker systems. This eliminates excessive current at low frequencies due to speaker transformer inductance, which can cause distortion or damage to the amplifier. If the CPA130 is used in mono-bridge mode to drive a distributed speaker system, it is only necessary for the
Channel 1 High-Pass Filter to be enabled. The CPA130 is shipped from the factory with the High-Pass Filters disabled ("OUT").
Front Panel Level Controls: The Channel Level Controls may be moved to the front panel of the CPA130. Remove the plugs from the front panel mounting holes (save them for the rear panel mounting holes). Remove the knobs from the level controls. Remove the nuts from the level controls using a 11mm (7/16") nut driver. Move the level controls to the front panel mounting holes (make sure that Channel
1 and Channel 2 level controls are in their proper locations). Re-install nuts and knobs (hold onto controls to avoid twisting wires). Install plugs in rear panel mounting holes. Check wire routing to avoid pinching or over-heating of wires.
5
SPECIFICATIONS
Maximum Power Output (@ 2kHz):
both channels driven into 4 ohms
both channels driven into 8 ohms
mono bridge into 8 ohms
Signal-to-Noise Ratio (20Hz~20kHzkHz):
rated power into 4 ohms
Total Harmonic Distortion:
20Hz~20kHz @ rated power
2kHz @ rated power (typical)
65 watts/channel
40 watts/channel
130 watts
> 96dB
< 0.2%
< 0.1%
Frequency Response (20Hz~20kHz): +0/-1dB
Input Impedance:
balanced
unbalanced
Input Sensitivity:
20k ohms
10k ohms
0.775 Vrms (0dBu)
120/240 VAC, 50/60Hz
300 watts max.
Power Requirements:
Power Consumption:
Dimensions:
height (2 rack-spaces)
width
depth
Weight:
3.5 inches (89mm)
19 inches (483mm)
10 inches (254mm)
22 lbs. (9.98kg)
6
BLOCK DIAGRAM
+
Channnel 1 input
Gnd
-
+
Channnel 2 input
Gnd
-
Balanced input Stage
Balanced input Stage
CPA130 Block Diagram
Peak
Signal
Detect
Out
HPF
Channel 1
Level
High Pass Filter
180Hz, 18dB/octave
High Pass Filter
180Hz, 18dB/octave
In
Driver Amplifier
Power Amplifier
Out
HPF Channel 2
Level
Mono
Bridge
Stereo
In
Driver Amplifier Power Amplifier
Peak
Signal
Detect
Channel 1
Output
Common
Channel 2
Output
Common
7
WARRANTY
BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR
LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE
PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL.
BIAMP Systems expressly warrants this product to be free from defects in material and workmanship for a period of 5 YEARS from the date of purchase as a new product from an authorized BIAMP Systems dealer under the following conditions.
1. In the event the warranted BIAMP Systems product requires service during the warranty period, BIAMP
Systems will repair or replace, at its option, defective materials, provided you have identified yourself as the original purchaser of the product to any authorized
BIAMP Systems Service Center. Transportation and insurance charges to and from an authorized Service
Center or the BIAMP Systems factory for warranted products or components thereof to obtain repairs shall be the responsibility of the purchaser.
2. This warranty will be VOIDED if the serial number has been removed or defaced; or if the product has been subjected to accidental damage, abuse, rental usage, alterations, or attempted repair by any person not authorized by BIAMP Systems to make repairs; or if the product has been installed contrary to BIAMP
Systems's recommendations.
3. Electro-mechanical fans, electrolytic capacitors, and the normal wear and tear of appearance items such as paint, knobs, handles, and covers are not covered under this warranty.
4. BIAMP SYSTEMS SHALL NOT IN ANY EVENT BE
LIABLE FOR SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, INCLUDING LOST
PROFITS, LOSS OF USE, PROPERTY DAMAGE, INJURY
TO GOODWILL, OR OTHER ECONOMIC LOSS OF ANY
SORT. EXCEPT AS EXPRESSLY PROVIDED HEREIN,
BIAMP SYSTEMS DISCLAIMS ALL OTHER LIABILITY TO
PURCHASER OR ANY OTHER PERSONS ARISING OUT
OF USE OR PERFORMANCE OF THE PRODUCT,
INCLUDING LIABILITY FOR NEGLIGENCE OR STRICT
LIABILITY IN TORT.
5. THIS WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES EXPRESSED OR IMPLIED. BIAMP
SYSTEMS EXPRESSLY DISCLAIMS ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. THE REMEDIES SET
FORTH HEREIN SHALL BE THE PURCHASER'S SOLE
AND EXCLUSIVE REMEDIES WITH RESPECT TO ANY
DEFECTIVE PRODUCT. THE AGENTS, EMPLOYEES,
DISTRIBUTORS, AND DEALERS OF BIAMP SYSTEMS
ARE NOT AUTHORIZED TO MODIFY THIS WARRANTY
OR TO MAKE ADDITIONAL WARRANTIES BINDING ON
BIAMP SYSTEMS. ACCORDINGLY, ADDITIONAL
STATEMENTS SUCH AS DEALER ADVERTISEMENTS
OR REPRESENTATIONS DO NOT CONSTITUTE
WARRANTIES BY BIAMP SYSTEMS.
6. No action for breach of this warranty may be commenced more than one year after the expiration of this warranty.
Thank you for purchasing BIAMP SYSTEMS...
AMERICAN SOUND CRAFTSMANSHIP
Biamp Systems
10074 S.W. Arctic Drive
Beaverton, Oregon 97005
(503) 641-7287 http://www.biamp.com
585.0070.00
