Biamp CPA650 User Manual

CPA 650

Power Amplifier

Operation Manual

Biamp Systems | 9300 S.W. Gemini Drive | Beaverton, OR | 97008 | USA | +1.503.641.7287 | www.biamp.com

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TABLE OF CONTENTS
Safety Information
Front Panel Features
Rear Panel Features
70V Mono-Bridge Output
Precautions
Specifications
Warranty
Declaration of Conformity

b CPA650

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CPA650

INTRODUCTION
CPA650 dual channel power amplifiers are designed to supply reliable service in permanent installations. CPA650

amplifiers have complete overload, short-circuit, and thermal protection, with automatic reset. Barrier strip input and 5­way binding post output connectors provide trouble free, dependable connections. CPA650 amplifiers are passively
cooled for quiet operation, without fan noise or filter maintenance. CPA650 amplifiers are CE marked, UL listed, and
covered by a five-year warranty.

CPA650 features include:

♦ balanced inputs on barrier strip terminals
♦ 325 watts/channel @ 4 ohms (stereo)
♦ 200 watts/channel @ 8 ohms (stereo)
♦ 650 watts @ 8 ohms (mono bridge)
♦ peak indicators on each channel
♦ detented level controls (front or rear mounting)
♦ turn-on muting to prevent "thumping"
♦ recessed ground lift switch to eliminate ground loops
♦ recessed mono bridge switch
♦ passively cooled (no fan noise or maintenance)
♦ covered by Biamp Systems' five-year warranty
♦ CE marked and UL listed

IMPORTANT SAFETY INSTRUCTIONS

Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any of the ventilation openings.
Install in accordance with the manufacturers

instructions.
WARNING - To reduce the risk of electric shock, do

not expose this apparatus to rain or moisture.
The apparatus shall not be exposed to dripping or

splashing and no objects, such as vases, shall be
placed on the apparatus.

Unplug this apparatus during lightning storms or
when unused for long periods of time.

Do not install near any heat sources such as

radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.

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 the third prong are
provided for your safety. When the provided plug
does not fit into your outlet, consult an electrician
for replacement of the obsolete outlet.

Protect the power cord from being walked on or
pinched particularly at plugs, convenience
receptacles, and the point where they exit from the
apparatus.

Refer all servicing 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.

Use only attachments/accessories specified by the manufacturer.
Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer or sold with the apparatus.

When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

Unplug this apparatus during lightning storms or when unused for long periods of time.
The appliance inlet shall be readily operable once installed.
WARNING - Terminals marked with the following symbol are Hazardous. Connections to these teminals must be

made by qualified personnel.

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3

4

5

FRONT PANEL FEATURES

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
Channel Level Controls on page 7). NOTE: Relocation of Channel Level Controls must be performed by trained service personnel only.

Power Indicator: This green LED indicator will light when AC power is applied to the unit (see Precautions on page 9).
AC Power Switch: This switch applies AC power to the unit (see Precautions on page 9).

6

REAR PANEL FEATURES

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 the standard fuse for the selected AC operational voltage. 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. For ~115 VAC operation, use a T 10A L 250V fuse. For ~230 VAC operation, use a T 5A L 250V fuse.

Voltage Selector Switch: For 115 VAC operation, slide until 115V is displayed. For 230 VAC operation, slide until 230V is displayed.
Channel Level Controls: These controls adjust the input signal level for each channel. After setting appropriate levels at the signal

source, then
becomes the active input and Channel 2 input is inactive. As an option, the Channel Level Controls may be mounted to the CPA650 front
panel. CAUTION: Disconnect the CPA650 from AC power before removing the top panel. Remove the plugs from the front panel
mounting holes (save them for the rear panel mounting holes). Remove the knobs and the nuts from the level controls (use an 11mm or
7/16" nut driver). Move the level controls to their respective front panel mounting holes. 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. NOTE:
Relocation of Channel Level Controls must be performed by trained service personnel only.

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
bridge 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 CPA650. 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 CPA650 will deliver up to 325 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 CPA650
will deliver up to 650 Watts mono-bridged into an 8 ohm minimum load. When using the CPA650 in mono-bridged mode, an autoformer is
not necessary to drive 70V speaker systems. However, the load must be floating (neither side grounded) and capacitors should be used
for isolation (see 70V Mono-Bridge Output on pg. 8).

Mono-Bridge Switch: This switch selects stereo or mono-bridge operation. In mono-bridge mode, Channel 1 is 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 CPA650 delivers 650 Watts mono-bridged into an 8 ohm minimum load.

Ground Lift Switch: This recessed switch allows the circuit (signal) ground to be lifted (disconnected) from the chassis (AC) ground. This
can help prevent hum inducing ground loops within the sound system, while maintaining safe AC grounding of the chassis.

adjust the Channel Level Controls for the desired output volume from the CPA650. In mono-bridge mode, Channel 1

(-) & (gnd). In mono-

7

70V MONO-BRIDGE OUTPUT

When using a CPA650 to drive a distributed 70V speaker system, a distribution transformer at the output of the amplifier is not required.
The CPA650 is capable of driving a 70V line directly. In order to protect the amplifier (and in case of amplifier failure, the speaker
transformers) one side of the 70V line must be capacitively isolated as shown below. This is necessary since the bandwidth of the
CPA650 extends well into the low-frequencies, and some protection is required to keep the amplifier from seeing the extremely low
impedance of the 70V line below 100Hz.

The two 100uF / 100V non-polar capacitors wired in parallel form a High Pass Filter at 100Hz. In addition, they provide DC protection in
case of amplifier failure. Any equalizer in the signal path should not have the low-frequencies boosted, since this will excessively load the
amplifier. All bands below 125Hz should be flat or cut only. If more low-frequency is needed, a directly driven sub-woofer should be used
to extend the low-frequencies below 100Hz.

325W/4Ω 325W/4

output 2 output 1

Ω

100uF

100V

non-

polar

100uF

100V

non-

polar

speaker

negative

++--- ---

speaker

positive

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PRECAUTIONS

Be sure that power to the CPA650 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.

Never connect the red (+) speaker binding posts directly together. This can result in internal damage to the amplifier.
Before turning power on, set the CPA650 level controls to the fully counter-clockwise (off) position.
The CPA650 is designed to be used in a standard 19" equipment rack or on a flat surface. The CPA650 has heat-sinks on each side panel

for passive cooling. Do not block the heat-sinks in any way. When mounting the CPA650 in a rack, leave at least one rack-space above
and below the amplifier to allow proper air flow. Do not use a CPA650 in a closed rack. In situations with high ambient temperatures,
particularly where multiple amplifiers are mounted in the same rack, it may be advisable 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 CPA650
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 CPA650 should require service, please contact Biamp Systems Customer Service at 1-800-826-1457 or [phone].

9

Maximum Power Output @ 2kHz (120 VAC)

SPECIFICATIONS

both channels driven into 4 ohms
both channels driven into 8 ohms
mono bridge into 8 ohms
Signal-to-Noise Ratio (0-30kHz)
rated power into 8 ohms 98dB
Total Harmonic Distortion
20Hz-20kHz @ rated power
2kHz @ rated power (typical)

Intermodulation Distortion (SMPTE) <0.3%

Frequency Response (20Hz-20kHz) +/-0.5dB
Input Impedance

balanced
unbalanced

Sensitivity 1 Vrms (2.2dBu)

Power Requirements 120/220 VAC, 50/60Hz

325 watts/channel
200 watts/channel

650 watts

<1.0%
<.08%

20k ohms
10k ohms

Power Consumption 1500 watts max.
Dimensions

height (3 rack spaces)
width
depth

Weight 33 lbs. (14.97kg)

5.25 inches (133mm)
19 inches (483mm)
11 inches (279mm)

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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

1. BIAMP Systems warrants to the original purchaser of new
products that the product will be free from defects in material
and workmanship for a period of 5 YEARS from the date of
purchase from an authorized BIAMP Systems dealer, subject to
the terms and conditions set forth below.

2. If you notify BIAMP during the warranty period that a BIAMP
Systems product fails to comply with the warranty, BIAMP
Systems will repair or replace, at BIAMP Systems' option, the
nonconforming product. As a condition to receiving the benefits
of this warranty, you must provide BIAMP Systems with
documentation that establishes that you were the original
purchaser of the products. Such evidence may consist of your
sales receipt from an authorized BIAMP Systems dealer.
Transportation and insurance charges to and from the BIAMP
Systems factory for warranty service shall be your responsibility.

3. This warranty will be VOID if the serial number has been
removed or defaced; or if the product has been altered,
subjected to damage, abuse or rental usage, repaired by any
person not authorized by BIAMP Systems to make repairs; or
installed in any manner that does not comply with BIAMP
Systems' recommendations.

4. Electro-mechanical fans, electrolytic capacitors, and normal
wear and tear of items such as paint, knobs, handles, and
covers are not covered under this warranty.

Biamp Systems

9300 S.W. Gemini Drive

Beaverton, Oregon 97008

[phone]

5. THIS WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED. BIAMP SYSTEMS
DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.

6. The remedies set forth herein shall be the purchaser's sole
and exclusive remedies with respect to any defective product.

7. No agent, employee, distributor or dealer of Biamp Systems
is authorized to modify this warranty or to make additional
warranties on behalf of Biamp Systems. statements,
representations or warranties made by any dealer do not
constitute warranties by Biamp Systems. Biamp Systems shall
not be responsible or liable for any statement, representation or
warranty made by any dealer or other person.

8. No action for breach of this warranty may be commenced
more than one year after the expiration of this warranty.

9. BIAMP SYSTEMS SHALL NOT BE LIABLE FOR SPECIAL,
INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
INCLUDING LOST PROFITS OR LOSS OF USE ARISING
OUT OF THE PURCHASE, SALE, OR USE OF THE
PRODUCTS, EVEN IF BIAMP SYSTEMS WAS ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES.

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585.0068.90C

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DoC CPA201003

EC Declaration of Conformity

Biamp Systems Corporation, as manufacturer having sole responsibility, hereby
declares that the following described product complies with the applicable provisions of
the DIRECTIVES below except as noted herein. Any alterations to the product not
agreed upon and directed by Biamp Systems Corporation will invalidate this declaration.

Product Model: CPA650
Product Description: Audio Amplifier
Applicable EC Directives: Applicable Harmonized Standards:
LVD Directive (2006/95/EC) Safety EN 60065:2002
EMC Directive (2004/108/EC) Emissions EN 55103-1:1996, Environment E2

Immunity EN 55103-2:1996
Special Considerations for Product Environment or Compliance:
Shielded cabling must be used for system connections.
Technical Documentation File, Location and Contact:
Biamp Systems, Inc. phone: [phone]

9300 S.W. Gemini Drive fax: [phone]
Beaverton, OR USA 97008 e-mail: [e-mail]

Authorized Representative: Larry Copley, Compliance Engineer

Authorized Signature:

Issued: March, 2010

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EU RoHS COMPLIANT

This Biamp product, including all attendant cables and accessories
supplied by Biamp, meets all requirements of EU Directives
2002/95/EC of January 27, 2003, and 2005/618/EC of August 18,
2005, the EU RoHS Directives. An EU RoHS Materials Content

(This information is presented to comply with the requirements of Chinese law SJ/T11363-2006)

部件名称 (Part Name)
设备机箱 (Equipment Chassis)
电源线 (Power Cord)
插拔式接线端子 (Plug-in Terminal Blocks)
手册和其他书面文档 (Manual and Paper Documents)
包装箱和所有包装材料 (Box and Packing Materials)

0：表示该部件所有均质材料中的这种有毒有害物质低于 SJ/T11363-2006 的限制要求.

Declaration document may be obtained at www.biamp.com

有害物质表 (Hazardous Substances Table)

Biamp Systems Corporation
音频放大器 (Audio Amplifier)

CPA650

有毒有害物质或元素 (Substances)

Pb 铅 Hg

汞

Cd

镉

Cr+6

六价铬

X O X O O O
O O O O O O
O O O O O O
O O O O O O
O O O O O O

PBB PBDE

X：表示该部件中至少有一种均质材料所含的这种有毒有害物质高于 SJ/T11363-2006 的限制要求.

在电触头和（或）镀镉所含的均质材料中，镉及其化合物的含量可以超过 0.01%，但欧盟指令 91/338/EEC（根据欧盟指令
76/769/EEC）限制销售和使用某些危险物质和制剂部分中所禁止的用途除外

在以下一种或多种物质所含的均质材料中，铅及其化合物的含量可以超过 0.1%:

1) 电子元器件中玻璃内所含的铅

2) 铅在钢材中是作为一种合金元素，含量可达 0.35%

3) 铅在铝材中是作为一种合金元素，含量可达 0.4%

4) 铅在铜材中是作为一种合金元素，含量可达 4%

5) 高熔点类焊料中的铅（即铅料合金，铅含量超过 85%）

6) 电子陶瓷部件内的铅

7) 由两种以上元素组成的焊料中所含的铅，用于连接针脚和微处理器包装，其中
铅的含量超过 80% 但低于 85%

8) 顺应针连接系统内的铅

9) 倒装芯片封装中半导体芯片及载体之间形成可靠连接所用焊料中的

在正常使用情况下，中国环保使用期限为 10 年，条件是：

• 环境温度为 0-40C (32-104°F)

• 湿度为 0-95%，无凝结

• 海拔高度为 0-10,000 英尺

• 气流不受阻碍

• 没有水或其他液体进入任何部件

• 电源为 115/230V~, 50/60Hz

• 部件没有损坏（损坏部件应立即修理）

• 由工厂授

权人员

使用批准的材料进行所有

维

修

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