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Crown CP660 Reference Manual

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CP660
Some models may be exported under the name Amcron .
®
© 2000 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone:
219-294-8200. CP660 amplifiers are produced by the Professional Audio Division of Crown
International, Inc. Trademark Notice: Crown
®
and Amcron
®
are registered trademark of Crown
International, Inc. Other trademarks are the property of their respective owners.
125381-2
3/00

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Summary of Contents for Crown CP660

  • Page 1 Some models may be exported under the name Amcron . ® © 2000 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-294-8200. CP660 amplifiers are produced by the Professional Audio Division of Crown International, Inc. Trademark Notice: Crown ®...
  • Page 2 ITEMS EXCLUDED FROM THIS CROWN WARRANTY Note: If your unit bears the name “Amcron,” please substitute it for the This Crown Warranty is in effect only for failure of a new Crown product which name “Crown” in this warranty. occurred within the Warranty Period. It does not cover any product which has...

  • Page 3: Important Safety Instructions

    Important Safety Instructions 1) Read these instructions. 2) Keep these instructions 3) Heed all warnings. 4) Follow all instructions. 5) Do not use this apparatus near water. 6) Clean only with a dry cloth. 7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

  • Page 4: Magnetic Field

    If you need special assistance beyond the scope of this manual, please contact our Technical Support Group. Crown Audio Division Technical Support Group Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A. Phone: 800-342-6939 (North America, Puerto Rico and Virgin Islands) or 219-294-8200 Fax: 219-294-8301 Fax Back (North America only): 800-294-4094 or 219-293-9200 Fax Back (International): 219-294-8100 Internet: http://www.crownaudio.com...

  • Page 5: Table Of Contents

    CP660 Six Channel Amplifier CONTENTS 1 Welcome ................. 6 1.1 Unpacking6 1.2 Features ................. 6 2 Controls, Indicators and Connectors ......... 7 3 Installation ................. 9 3.1 Mounting ................. 9 3.2 Cooling ................. 9 3.3 Wiring 3.3.1 Mode of Operation ............9 3.3.2 Audio Input Connection ..........

  • Page 6: Welcome

    With six independent chan- shipping damage. Crown will be happy to cooperate nels, the CP660 takes the place of three, two channel fully, as needed. Save the shipping carton as evidence amplifiers, yet still fits in a standard two-rack space. Its of damage for the shipper’s inspection.

  • Page 7: Controls, Indicators And Connectors

    Power Indicator Clip Indicators The green power indicator turns on when the CP660 has been turned on and has power. Six yellow clip indicators are provided. These will light when distortion is audible on the amplifier output of the...
  • Page 8 CP660 Six Channel Amplifier Fig. 2.2 Rear Controls and Connectors Power Cord Balanced Barrier Block Inputs For connection to your AC power source. The inputs are standard, balanced, barrier block inputs. Each input includes positive (+) and negative (–) signal terminals and a chassis ground terminal.

  • Page 9: Installation

    This means you can expect the amplifier to re- rack to help support the unit’s weight. quire more air flow with a 4-ohm load than with an 8- The CP660 amplifier is 19 inches (48.3 cm) wide, 12 ohm load. inches (32.3 cm) deep, and 3 inches (8.9 cm) high.

  • Page 10: Audio Input Connection

    3.3.2 Audio Input Connection To put the amplifier into Dual mode, turn it off, slide the The CP660’ s input panel is modular, meaning it is avail- Dual/Mono switch to the Dual (left) position, and prop- able with either barrier block inputs, or RCA inputs. The erly connect the output wiring.

  • Page 11: Output Connection

    Fig. 3.2 Balanced Input Wiring 3.3.3 Output Connection Consider the power-handling capacity of your load be- fore connecting it to the amplifier. Crown is not liable for damage incurred at any time due to overpowering. Fus- ing loudspeaker lines is highly recommended (see Sec- tion 3.3.4).

  • Page 12: Additional Load Protection

    7. If the size of the cable exceeds what you want to use, (1) find a way to use shorter cables, (2) settle for a The CP660 amplifier can generate substantial power lower damping factor, or (3) use more than one cable output.
  • Page 13 CP660 Six Channel Amplifier Two different types of fuses are required for thermal pro- There are mainly two different approaches used when tection and voltage protection. Slow-blow fuses are usu- installing fuses for loudspeaker protection. A common ally selected to protect loudspeakers from thermal...

  • Page 14: Ac Power Requirements

    CP660 Six Channel Amplifier 3.4 AC Power Requirements Use Good Connectors All 120-VAC, 60-Hz North American units have a NEMA 1. To prevent possible short circuits, do not ex- 5-15 AC plug. These units include a 16-gauge cord. To pose the loudspeaker cable connectors.

  • Page 15: Operation

    CP660 Six Channel Amplifier 4.2 Indicators 4 Operation The front panel of a CP660 amplifier has several helpful 4.1 Precautions indicators. The green Power indicator shows that the am- The CP660 amplifier is protected from internal and external plifier has been turned on (or enabled).

  • Page 16: Controls

    CP660 Six Channel Amplifier 4.4 Controls A Level control is provided for each channel.These level controls are located on the back panel, providing a mea- The Power switch is located on the front panel so you can sure of security against unauthorized system changes.

  • Page 17: Other Issues

    CP660 Six Channel Amplifier 5 Other Issues A third problem to avoid is hum. The two most common sources of hum in an audio system are inductive cou- 5.1 Solving Input Problems pling and ground loops. Sometimes large infrasonic (sub-audible) frequencies Inductive coupling can occur when input cables are are present in the input signal.

  • Page 18: Solving Output Problems

    CP660 Six Channel Amplifier 5.2 Solving Output Problems Another problem to avoid is the presence of large infra- sonic currents when primarily inductive loads are High-frequency oscillations can cause your amplifier used. Examples of inductive loads are 70-volt trans- to prematurely activate its protection circuitry. The ef- formers and electrostatic loudspeakers.

  • Page 19: Applications

    This section will show various ways in which your new CP660 can be configured to fit a variety of The diagram in Fig. 6.1 shows one possible way of needs.

  • Page 20: Meeting Hall

    (Fig. 6.2), and one on a smaller auxiliary rooms, dressing rooms, or hallways. situation (Fig. 6.3). Monitor mixes are common in any size hall. The CP660 can help with all these situations. * Voltage Controller (Attenuator) Fig 6.2 Large Meeting Hall Application Page 20...
  • Page 21 CP660 Six Channel Amplifier Fig. 6.3 Small Meeting Hall Application Page 21 Reference Manual...

  • Page 22: Surround Sound Environment

    6.4 Surround Sound Environment rear speakers are powered from just one channel, The CP660 is the perfect amplifier for the surround and the sub-woofer is powered from two channels sound enthusiast. Six separate inputs and outputs bridged together. If you run your system so your rear...

  • Page 23: Courtroom

    It’s hard to think of a situation where listening is as Fig. 6.5 shows one way to configure a system for a critical as it is in a courtroom. The CP660 can courtroom situation. provide sound distribution to the defense, prosecution, jury, gallery, and judge.

  • Page 24: Conclusion

    Crown CP660 CP660 . Power Amplifier. From amusement parks to zoos, theaters to small clubs, the CP660 can fill the need. Page 24 Reference Manual...

  • Page 25: Specifications

    Damping Factor: >250 from 20 to 400 Hz. Power: The green power indicator turns on when the Phase Response: ±15 degrees from 20 Hz to 10 kHz CP660 has been turned on and has power. @ 1 watt. Signal Indicators: Each channel has a green indicator Signal to Noise: >...

  • Page 26: Protection

    CP660 Six Channel Amplifier 7.6 Protection 7.7 Construction The CP660 amplifier is protected against shorted, Durable black powdercoat finish on the steel chassis, open or mismatched loads; overloaded power sup- front panel Lexan overlay, with flow-through ventilation plies; excessive temperature, chain destruction phe- from front to back panels.
  • Page 27 CP660 Six Channel Amplifier Fig. 7.1 Frequency Response Fig. 7.2 Phase Response Page 27 Reference Manual...

  • Page 28: Service

    It is important that you have your copy of instruction manual, cables and other hardware. the bill of sale as your proof of purchase. If you have any questions, please call or write the Crown 8.2.1 Service at a North American Service Center Technical Support Group.
  • Page 29 CP660 Six Channel Amplifier Crown Factory Service Information Shipping Address: Crown International, Inc., Factory Service, Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, IN 46517 Phone: 1-800-342-6939 or 1-219-294-8200 Fax: 1-219-294-8124 Owner’s Name: _________________________________________________________________________ Shipping Address: ______________________________________________________________________ Phone Number: _____________________________...

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