Crown CH Series Operation Manual
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Crown CH Series Operation Manual

Ch and cl series power amplifiers
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Operation Manual

Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice: Crown, Crown Audio, Amcron, and BCA are registered trademarks of Crown International. Other trademarks are
the property of their respective owners.
Some models may be exported under the name Amcron.
®
©2006 by Crown Audio
Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000
CH and CL Series
CH1
CH2
CH4
CL1
CL2
CL4
®
130808-8
1/06

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  • Page 1: Operation Manual

    The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com. Trademark Notice: Crown, Crown Audio, Amcron, and BCA are registered trademarks of Crown International. Other trademarks are the property of their respective owners.

  • Page 2: Important Safety Instructions

    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 ventilation openings. Install in accordance with the manufacturer’s instruc- tions.

  • Page 3: Declaration Of Conformity

    Cardiff. South Glamorgen CF14 9UG United Kingdom Equipment Type: Commercial Audio Power Amplifiers Family Name: CH Series, CL Series Model Names: CH1, CH2, CH4, CL1, CL2, CL4 EMC Standards: EN 55103-1:1995 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions EN 55103-1:1995 Magnetic Field Emissions-Annex A @ 10 cm and 1 M EN 61000-3-2:1995+A14:2000 Limits for Harmonic Current Emissions (equipment input current ≤16A per phase)

  • Page 4: Table Of Contents

    Table of Contents Important Safety Instructions ...2 Declaration of Conformity ...3 1 Welcome ... 5 1.1 Features ...5 1.2 How to Use This Manual ...5 2 Setup ... 6 2.1 Unpack Your Amplifier ...6 2.2 Install Your Amplifier ...6 2.3 Ensure Proper Cooling ...6 2.4 Choose Input Wire and Connectors ...7 2.5 Choose Output Wire and Connectors ...7 2.6 Switch Settings ...8...

  • Page 5: Output Power

    CH Series amplifiers can directly drive “con- 1.1 Features stant voltage” lines, so you can avoid the •...

  • Page 6: Setup

    2 Setup 2.1 Unpack Your Amplifier Please unpack and inspect your amplifier for any damage that may have occurred during transit. If damage is found, notify the transpor- tation company immediately. Only you can ini- tiate a claim for shipping damage. Crown will be happy to help as needed.

  • Page 7: Choose Input Wire And Connectors

    CH and CL Series Power Amplifiers 2 Setup 2.4 Choose Input Wire and Connectors You have three choices of input connectors: 1/4-inch (6.35-mm) phone, 3-pin XLR, or barrier strip. You can also use either bal- anced or unbalanced wiring. Figure 2.3 shows balanced connector pin assignments for XLR and phone.

  • Page 8: Switch Settings

    Model CH4 Models CH1 and CH2 Figure 2.9 Channel Operation Switches When the CH Series amplifier is set up for two- channel (Stereo mode) operation, it is possible to configure the output channels for either 4/8 ohm or 70V operation.

  • Page 9: Wire Your System

    CH and CL Series Power Amplifiers 2 Setup 2.7 Wire Your System 2.7.1 Models CH1 & CH2 Stereo Mode See Figure 2.10. In this example, Channel 1 is wired to a 4/8 ohm load and Channel 2 is wired to a 70V load.

  • Page 10: Model Ch4 Stereo Mode

    CH and CL Series Power Amplifiers 2 Setup 8 or 4 ohms 2.7.3 Model CH4 Stereo Mode See Figure 2.12. In this example, Channel 1 is wired to a 4/8 ohm load and Channel 2 is wired 70 V to a 70V load. Make sure the Mode switch is set to the “Stereo”...

  • Page 11: Models Cl1 & Cl2 Stereo Mode

    CH and CL Series Power Amplifiers 2 Setup 2.7.5. Models CL1 & CL2 Stereo Mode See Figure 2.14. In this example, Channel 1 and Channel 2 are wired to 4/8-ohm speaker loads. Make sure the Mode switch is set to the “Stereo” position.

  • Page 12: Model Cl4 Stereo Mode

    CH and CL Series Power Amplifiers 2 Setup 2.7.7. Model CL4 Stereo Mode See Figure 2.16. In this example, Channel 1 and Channel 2 are wired to 4/8-ohm speaker loads. Make sure the Mode switch is set to the “Stereo” position.

  • Page 13: All Models: How To Parallel The Inputs

    CH and CL Series Power Amplifiers 2 Setup 2.7.9 All Models: How to Parallel the Inputs in Stereo Mode There are three ways to feed the same signal to each amplifier channel: 1. Buy a “Y” cable. Plug the female end into your signal cable, and plug the split male ends into both amplifier inputs.

  • Page 14: Operation

    3 Operation 3.1 Precautions Your amplifier is protected from internal and exter- nal faults, but you should still take the following precautions for optimum performance and safety: 1. Before use, your amplifier first must be config- ured for proper operation, including input and output wiring hookup.
  • Page 15 CH and CL Series Power Amplifiers 3 Operation “OFF” Position “ON” Position Power Switch Operation Manual Channel 1 Signal, Clip & Fault Indicators Figure 3.1 CH and CL Series Front Panel Controls and Indicators Figure 3.2 Models CH1 & CH2 Back Panel Controls and Connectors (Shown with No-Touch Cover Removed) POWER FAULT...
  • Page 16 CH and CL Series Power Amplifiers 3 Operation Figure 3.3 Model CH4 Back Panel Controls and Connectors (Shown with No-Touch Cover Removed) Figure 3.4 Models CL1 & CL2 Back Panel Controls and Connectors (Shown with No-Touch Cover Removed) page 16 Operation Manual...
  • Page 17 CH and CL Series Power Amplifiers 3 Operation 3-Speed Fan-On-Demand Figure 3.5 Model CL4 Back Panel Controls and Connectors (Shown with No-Touch Cover Removed) Operation Manual page 17...

  • Page 18: Indicators

    CH and CL Series Power Amplifiers A two-position Output Operation switch (CH Series amplifiers only) allows the selection of either 4/8 ohm or 70V output from the ampli- fier. See Section 2 for more information about output operating modes.

  • Page 19: Bca ® (Ch4 And Cl4 Only)

    CH and CL Series Power Amplifiers 4 Advanced Features and Options NOTE: For detailed information about these Crown amplifier features, please consult the Crown Amplifier Application Guide, available on the Crown website at www.crownaudio.com. 4.1 Protection Systems CH and CL Series amplifiers are protected against shorted, open or mismatched loads;...

  • Page 20: Advanced Features

    4 Advanced Features and Options SST-SBSC-3632T This is a custom three-channel crossover net- work with CD-horn equalization and summed low-frequency output specifically designed for ® use with JBL model 3632T ScreenArray cinema speaker systems installed in cinemas, studio production and post-production envi- ronments.

  • Page 21: Fault Monitoring

    CH and CL Series Power Amplifiers 4 Advanced Features and Options 4.3.3 Fault Monitoring The Fault (RJ-11) jack, which looks like a tele- phone plug, is located on the back of your CH or CL amplifier (Figure 4.2). It gives you an easy way to remotely monitor the amplifier’s fault status.

  • Page 22: Advanced Features

    4 Advanced Features and Options 4.3.4 Precision Detented Level Controls A 21-position Precision Detented Level Control is provided for each channel. Level attenuation may be adjusted in precise steps as shown in Figure 4.5. For security, the level controls are located on the back panel.

  • Page 23: Principles Of Operation

    CH and CL Series Power Amplifiers 5 Principles of Operation 5.1 CH1, CH2, CL1 and CL2 For the sake of simplicity, only channel one of the amplifier is described. Signal is presented to the amplifier through one of three connectors when using the standard input module.
  • Page 24 5 Principles of Operation switch is set to 4/8 Ohm, only the negative and 4/8 ohm connections on the barrier block have audio present. This provides power to low impedance speakers. When the Channel Opera- tion switch is set to 70V, only the negative and 70V connections on the barrier block have audio present.

  • Page 25: Ch4 And Cl4

    CH and CL Series Power Amplifiers 5 Principles of Operation 5.2 CH4 and CL4 5.2.1 Audio Signal Path For the sake of simplicity, only channel one of the audio signal path is described. Signal is presented to the CH4/CL4 through one of three connectors when using the stan- dard input module.
  • Page 26 5 Principles of Operation The signal next enters the main amplifier error amp where it is mixed with a small portion of the output voltage and current in such a way as to control the amplifier’s overall output perfor- mance. Following the error amp is the modulator stage where the audio signal is compared to an extremely accurate 250-kHz triangle waveform.

  • Page 27: Power Supply Operation

    CH and CL Series Power Amplifiers 5 Principles of Operation normally runs at very low speed when the amplifier is idling or when it is being used for low to moderate duty work. If the amplifier is delivering large amounts of power into low impedance loads, the heatsinks or transformer may heat up enough to increase the speed of the fan to medium and possibly to high speed.

  • Page 28: Troubleshooting

    6 Troubleshooting page 28 CONDITION: Power indicator is off. POSSIBLE REASON • The amplifier has lost AC power. • The amplifier’s Power switch is off. • The amplifier is not plugged into the power receptacle. • The power supply circuit breaker has tripped.

  • Page 29: Specifications

    CH and CL Series Power Amplifiers 7 Specifications The following specifications apply to all models in Dual 8/4 ohm mode with 8-ohm loads unless otherwise specified. Minimum Guaranteed Power 120V/60 Hz Units, Dual mode, per channel, both channels driven 1 kHz at rated THD 2 ohms 4 ohms 8 ohms...
  • Page 30 7 Specifications The following specifications apply to all models in Dual 8/4 ohm mode with 8-ohm loads unless otherwise specified. Minimum Guaranteed Power 120V/60 Hz Units, Dual mode, per channel, both channels driven 1 kHz at rated THD 2 ohms 4 ohms 8 ohms 120V/60 Hz Units, Bridge mono mode...
  • Page 31 CH and CL Series Power Amplifiers 7 Specifications Figure 7.1 Models CH1 & CH2 Frequency Response (Typical) Figure 7.2 Model CL1 & CL2 Frequency Response (Typical) Figure 7.3 Models CH1, CH2, CL1 & CL2 Output Impedance (Typical) (CH1, CH2 Set To 4/8 Ohm Mode) Operation Manual FREQUENCY (Hz) 8ohm...
  • Page 32 CH and CL Series Power Amplifiers Figure 7.4 Models CH4 & CL4 Frequency Response (Typical) Figure 7.5 Models CH1, CH2, CL1 & CL2 Damping Factor (Typical) (CH1, CH2 Set To 4/8 Ohm Mode) page 32 Operation Manual...
  • Page 33 CH and CL Series Power Amplifiers Figure 7.6 Models CH4 & CL4 Damping Factor (Typical) Figure 7.7 Models CH4 & CL4 Output Impedance (Typical) Operation Manual page 33...

  • Page 34: Ac Power Draw And Thermal Dissipation

    8 AC Power Draw and Thermal Dissipation This section provides detailed information about the amount of power and current drawn from the AC mains by CH and CL amplifiers and the amount of heat produced under various conditions. The calculations presented here are intended to provide a realistic and reliable depiction of the amplifiers.

  • Page 35: Thermal Dissipation

    CH and CL Series Power Amplifiers 8 AC Power Draw and Thermal Dissipation Figure 8.1 Model CH1 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 8.2 Model CH2 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Operation Manual page 35...
  • Page 36 CH and CL Series Power Amplifiers 8 AC Power Draw and Thermal Dissipation Figure 8.3 Model CH4 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 8.4 Model CL1 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles page 36 Operation Manual...
  • Page 37 CH and CL Series Power Amplifiers 8 AC Power Draw and Thermal Dissipation 2 OHMS DUAL / 4 OHMS BRIDGE AC Mains Duty Current Draw(Amps) Power Cycle Draw 100-120 (Watts) 1560 15.6 1260 12.6 Figure 8.5 Model CL2 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 8.6 Model CL4 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Operation Manual LOAD...

  • Page 38: Service

    9.2.5 Estimate Approval Approval of estimate must be given within 90 days after being notified by Crown Audio Inc. Units still in the pos- session of Crown after 90 days of the estimate will become the property of Crown Audio Inc.

  • Page 39: Warranty

    CH and CL Series Power Amplifiers 10 Warranty SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUB- SEQUENT OWNER of each NEW Crown product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship.
  • Page 40 10 Warranty SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUB- SEQUENT OWNER of each NEW Crown1 product, for a period of three (3) years from the date of pur- chase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship, and we...

  • Page 41: Crown Factory Service Information Form

    CH and CL Series Power Amplifiers Online registration is also available at http://crownweb.crownintl.com/webregistration When this form is used to register your product, it may be mailed or faxed. Please note that some information is required. Incomplete registrations will not be processed. * Indicates required information. * First name: ______________________ Middle initial: _____ * Last name: ________________________________ Company: _________________________________________________________________________________ * Mailing address: ____________________________________________________________________________...
  • Page 42 CH and CL Series Power Amplifiers THIS PAGE INTENTIONALLY LEFT BLANK page 42 Operation Manual...

  • Page 43: Crown Audio Factory Service Information

    CH and CL Series Power Amplifiers Crown Audio Factory Service Information Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 SRA #: __________________(If sending product to Crown factory service.) Individual or Business Name: ___________________________________________________________________________________________________________________________________________________________________________ Phone #: __________________________________________________ _________________________________________________________ Street Address (please, no P.O.

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