Table of Contents
Advertisement
PROFESSIONAL POWER AMPLIFIERS
-6
-10
-15
-30
-80
0 dB
Ch A
-6
-10
-15
-30
-80
0 dB
Ch A
-6
-10
-3
-15
-30
-80
0 dB
Ch A
-6
-10
-15
-30
-80
0 dB
Ch A
-6
-10
-15
-30
-80
0 dB
Ch A
OWNER' S MANUAL
ACL
-6
-3
-10
-3
CP A
Signal
-15
1 800
-1
Protect
-1
-30
Active
-80
0 dB
Ch B
Cinema Power Amplifier
-6
ACL
-3
-10
-3
CP A
Signal
1 200
-15
-1
Protect
-1
-30
Active
-80
0 dB
Ch B
Cinema Power Amplifier
-6
ACL
-10
-3
CP A
Signal
-15
900
-1
Protect
-1
-30
Active
-80
0 dB
Ch B
Cinema Power Amplifier
-6
ACL
-3
-10
-3
CP A
Signal
-15
600
-1
Protect
-1
-30
Active
-80
0 dB
Ch B
Cinema Power Amplifier
-6
ACL
-3
-10
-3
CP A
Signal
-15
400
-1
-1
Protect
-30
Active
-80
0 dB
Ch B
Cinema Power Amplifier
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Crest Audio CPA
Summary of Contents for Crest Audio CPA
- Page 1 PROFESSIONAL POWER AMPLIFIERS CP A Signal 1 800 Protect Active 0 dB 0 dB Ch A Ch B Cinema Power Amplifier CP A Signal 1 200 Protect Active 0 dB 0 dB Ch A Ch B Cinema Power Amplifier CP A Signal Protect Active...
-
Page 2: Important Precautions
Damage caused by connec- Crest Audio is not responsible for dam- tion to improper AC voltage is not cov- age to loudspeakers for any reason. -
Page 3: Table Of Contents
Specifications Appendix B CPA Block Diagram Appendix C Wire Gauge Charts Appendix D Rear Panel Symbols - Legend Appendix E CPA1800 Power Amplifier - Special Functions Crest Audio CPA Series Power Amplifiers Page 3 Models CPA400, CPA600, CPA900, CPA1200, CPA1800... - Page 4 Rear & Side Views Binding Post output model shown CPA400 CPA600 CPA900 CPA1200 CPA1800* Speakon output model shown *Note: see Appendix E for detailed CPA1800 rear panel drawings. Page 4 Crest Audio CPA Series Power Amplifiers Models CPA400, CPA600, CPA900, CPA1200, CPA1800...
-
Page 5: Introduction
For your safety, please read the Important Precautions section before installing and operating the amplifier. The Crest Audio CPA Series is based on the same advanced circuit topologies that have made Crest ampli- fiers the choice of touring professionals worldwide. CPA Series amplifiers are designed for high operating efficiency and accurate sonic performance across the full audio bandwidth, even under stressful conditions. -
Page 6: Front Panel
3. Fan Outlet Grills. CPA Series amplifiers are cooled by two, rear-mounted fans. Cool air flows over the heat sinks and exhausts through the front grills. Make sure these outlets remain clear to allow unrestricted air flow. 4. AC Power Switch/Circuit Breaker. -
Page 7: Rear Panel
10. Output Connectors (Two versions, market dependent) CPA Series amplifiers are supplied with either 5-way Binding Posts or Speakon connectors. Connection to the binding posts can be made with bare wire, banana plugs, or spade lug terminations. Make connections to both the Channel A and Channel B terminals for Stereo or Parallel Mode, or a single connection across the red (“hot”) terminals only of Channels A and B for Bridged Mono Mode. -
Page 8: Internal Configuration And Control
Input XLR Polarity CPA Series amplifiers are supplied standard with the XLR configured as “Pin 2 hot” (+). On models , CPA400, CPA600, CPA900 and CPA1200, an internal jumper makes it possible to alter the amplifier to “Pin 3 hot” (+). -
Page 9: Operation
Also, as an extra precaution, have the attenuators turned down during power-up. Cooling System and Requirements. CPA Series amplifiers use a twin-tunnel forced-air cooling system to maintain a low, even operating tem- perature. Drawn in by dual 45 cubic feet-per-minute (CFM) fans on the rear panel, air flows through the cooling fins of the channel heat sinks (dissipating power transistor heat), then exhausts through the front panel slots. -
Page 10: Connecting Inputs
Connecting Inputs. Use either the XLR or 1/4-inch input connectors on the rear to supply audio signals to your Crest Audio CPA Series amplifier. Both connectors accept balanced and unbalanced audio connections. (The CPA Series amplifiers are configured standard with “Pin 2 hot” on XLR inputs. Please note that some other Crest Audio amplifiers are configured with “Pin 3 hot”). -
Page 11: Mode Selection
See figures on pages 12 & 13 showing output connection information. Connecting amplifier outputs to oscilloscopes or other test equipment while the amplifier is in bridged mode may damage both the amplifier and test equipment! Crest Audio CPA Series Power Amplifiers Page 11 Models CPA400, CPA600, CPA900, CPA1200, CPA1800... - Page 12 CPA1800 features two pair of 5-Way Output Binding Posts. Parallel Mode Connections (5-Way Output Binding Posts) Bridged Mono Mode Connections (5-Way Output Binding Posts) Page 12 Crest Audio CPA Series Power Amplifiers Models CPA400, CPA600, CPA900, CPA1200, CPA1800...
- Page 13 Stereo Mode Connections (Speakon Output Connectors) Parallel Mode Connections (Speakon Output Connectors) Bridged Mono Mode Connections (Speakon Output Connectors) Crest Audio CPA Series Power Amplifiers Page 13 Models CPA400, CPA600, CPA900, CPA1200, CPA1800...
-
Page 14: Protection Features
Protection ® Every model in the CPA Series incorporates TourClass protection features. Derived from Crest Audio’s extensive experience with the world’s largest sound rental companies, the TourClass group of circuits sets the industry standard for assured protection of internal amplifier circuits and all connected loads. -
Page 15: User Precautions
The amplifier’s clipping point is its maximum peak output power. At maximum peak output power, Crest Audio CPA Series amplifiers will deliver more power than many speakers can safely handle. Be sure the peak power capability of the amplifier is not excessive for your speaker system. To ensure that the speakers never receive excessive power, and to prevent amplifier clipping, use a properly adjusted external limiter (or a compressor with a ratio of 10:1 or higher) to control power output. -
Page 16: Maintenance
Crest Audio. User Responsibility Your CPA Series amplifier is very powerful and can be potentially dangerous to loudspeakers and operators alike. It is your responsibility to read the section titled “Important Precautions” and make sure that the amplifier is installed, wired, and operated properly as instructed in this manual. - Page 17 Appendices...
-
Page 18: Specifications
5 years* † For full power at 4 Ohms.* 3-Year Warranty with 2 additional years if Registration Card is sent to Crest Audio. (USA, Canada, United Kingdom and many other countries). Crest Audio reserves the right to make changes or improvements in manufacturing or design which may affect specification. ©1998 Crest Audio Inc. 6/8/98... -
Page 19: Cpa Block Diagram
Appendix B - CPA Block Diagram CHANNEL A PREAMP NON-INVERTED ATTENUATOR † OUTPUT STAGE 2 / 3 INVERTED PIN 2 / 3 + JUMPER OUTPUT RELAY (REAR PANEL SWITCH AMP FRONT END ON CA18) † PREAMP INCORPORATES INPUT BRIDGED SENSITIVITY/VOLTAGE GAIN JUMPER... -
Page 20: Wire Gauge Charts
1.45 0.87 1.74 0.55 1.09 0.37 0.73 1.45 8.24% 15.5% 10.8 19.9 0.75 10.8 1.74 1.09 1.74 0.73 1.09 15.5% 0.73% 0.75 15.5 18.2 12.0 1.31 Appendix C Crest Audio CPA Series Power Amplifiers Models CPA400, CPA600, CPA900, CPA1200, CPA1800... - Page 21 0.25 0.51 1.61% 3.2% 6.2% 1.02 0.64 1.28 0.40 0.80 1.60 0.25 0.51 1.01 6.2% 11.9% 14.6 1.60 1.01 0.60 1.20 11.9% 14.6 17.8 11.8 1.20 Crest Audio CPA Series Power Amplifiers Appendix C Models CPA400, CPA600, CPA900, CPA1200, CPA1800...
-
Page 22: Rear Panel Symbols - Legend
5-Way Binding Post Output Connection - Channel A Stereo/Parallel 5-Way Binding Post Output Connection - Bridged Mono 5-Way Binding Post Output Connection - Channel B Stereo/Parallel Appendix D Crest Audio CPA Series Power Amplifiers Models CPA400, CPA600, CPA900, CPA1200, CPA1800... - Page 23 XLR Pin+ switch or the Gain switch! CPA1800 Binding Post Version - Rear View Gain Switch XLR Pin (+) Switch CPA1800 Speakon Version - Rear View Crest Audio CPA Series Power Amplifiers Appendix E Models CPA400, CPA600, CPA900, CPA1200, CPA1800...
- Page 24 Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA : 201.909.8700 : 201.909.8744 http://www.crestaudio.com Printed in USA v. 1.0 8/6/98 © 1998 Crest Audio, Inc. Choice of touring professionals. *A4500010*...
Need help?
Do you have a question about the CPA and is the answer not in the manual?
Questions and answers