CH and CL Series CH1 CH2 CH4 Operation Manual CL1 CL2 CL4 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.
CH and CL Series Power Amplifiers Important Safety Instructions IMPORTANT 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) page 2 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 instructions.
CH and CL Series Power Amplifiers DECLARATION of CONFORMITY Crown International, Inc. Issued By: FOR COMPLIANCE QUESTIONS ONLY: Crown International, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A. Sue Whitfield 574-294-8289 swhitfield@crownintl.com European Representative's Name and Address: Nick Owen 35, Bassets Field Thornhill Cardiff.
CH and CL Series Power Amplifiers Table of Contents Important Safety Instructions .......................................................2 4 Advanced Features and Options .............................. 19 Declaration of Conformity ............................................................3 4.1 Protection Systems ..................................................................19 1 Welcome ..................................................... 5 4.1.1 Power Circuit Breaker ...........................
CH and CL Series Power Amplifiers Output Power Output Output Power Power at at 11 kHz kHz at at rated rated THD; THD; Stereo Stereo mode, mode, per per channel channel with with both both channels channels driven. driven.
CH and CL Series Power Amplifiers 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 transportation company immediately. Only you can initiate a claim for shipping damage. Crown will be happy to help as needed. Save the shipping carton as evidence of damage for the shipper’s inspection.
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 balanced or unbalanced wiring. Figure 2.3 shows balanced connector pin assignments for XLR and phone. Figure 2.4 shows unbalanced connector pin assignments for XLR and phone. Figure 2.5 shows barrier strip input wiring for a balanced signal.
CH and CL Series Power Amplifiers 2 Setup 2.6 Switch Settings Proper wiring depends on how you configure your amplifier. The CH and CL Series offer various modes of operation: • Constant-voltage load • 4/8-ohm load • Stereo mode • Bridge-mono mode CH Series amplifiers only: Select 4/8 ohm or 70V operation as appropriate for your application and your amplifier. Select output operation by sliding the recessed Output Operation switches to the desired position as shown in Figure 2.9.
CH and CL Series Power Amplifiers 2 Setup 2.7 Wire Your System 8 or 4 ohms 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. Make sure the Mode switch is set to the “Stereo” position. Set the Channel Operation Switch to 4/8 ohms on Channel1, and to 70V on Channel 2. INPUTS: Connect input wiring for each channel. OUTPUTS: Maintain proper polarity (+/–) on output connectors.
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 to a 70V load. 70 V Make sure the Mode switch is set to the “Stereo” position. Set the Channel Operation Switch to 4/8 ohms on Channel1, and to 70V on Channel 2. INPUTS: Connect input wiring for each channel. OUTPUTS: • Connect Channel 1 positive (+) speaker lead to Channel 1 positive (+) terminal of amp.
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. Mixer Make sure the Mode switch is set to the “Stereo” position. INPUTS: Connect input wiring for each channel. OUTPUTS: • Connect Channel 1 positive (+) speaker lead to Channel 1 positive (+) terminal of amp. • Connect Channel 1 negative (–) speaker lead to Channel 1 negative (–) output terminal of amp.
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. INPUTS: Connect input wiring for each channel. OUTPUTS: • Connect Channel 1 positive (+) speaker lead to Channel 1 positive (+) terminal of amp. • Connect Channel 1 negative (–) speaker lead to Channel 1 negative (–) output terminal of amp. • Repeat similarly for Channel 2.
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. 2. Feed your signal to the Channel-1 input (either barrier-block or XLR/Combo). Connect a jumper wire (Figure 2.18) between the barrier-block Channel-1 (+) screw terminal and the Channel-2 (+) screw terminal.
CH and CL Series Power Amplifiers 3 Operation 3.1 Precautions Your amplifier is protected from internal and external faults, but you should still take the following precautions for optimum performance and safety: 1. Before use, your amplifier first must be configured for proper operation, including input and output wiring hookup. Improper wiring can result in serious operating difficulties.
CH and CL Series Power Amplifiers 3 Operation POWER CLIP FAULT FAULT CLIP SIGNAL “OFF” Position Power Indicator “ON” Position Power Switch SIGNAL Channel 1 Signal, Clip & Fault Indicators Channel 2 Signal, Clip & Fault Indicators Figure 3.1 CH and CL Series Front Panel Controls and Indicators Figure 3.
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.
CH and CL Series Power Amplifiers 3 Operation 3-Speed Fan-On-Demand Figure 3.
CH and CL Series Power Amplifiers 3 Operation The red Clip indicators turn on when distortion is audible in the amplifier output. 3.2 Indicators The front panel of a Contractor Series amplifier has several helpful indicators (Figure 3.6). The blue Power indicator shows that the amplifier has been turned on and has power. The green Signal Presence Indicators (SPI) illuminate when a signal (>–40 dBm) is present at the INPUT of the amplifier.
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; overloaded power supplies; excessive temperature, chain destruction phenomena, input overload damage and high-frequency blowups.
CH and CL Series Power Amplifiers 4 Advanced Features and Options SST-SBSC-3632T SST-4622 This is a custom three-channel crossover network 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 environments. See Figure 4.1.
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 telephone 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. To set up a circuit that will cause an LED to light whenever a fault status occurs, you can simply use the suggested circuit shown in Figure 4.3.
CH and CL Series Power Amplifiers 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. ATTENUATION in dB Detent 4/8 Ohm 70V 100V 0 (full CCW) -68.31 -72.90 -71.02 1 -67.54 -72.06 -70.26 2 -32.23 -36.61 -34.90 3 -25.46 -29.74 -28.00 4 -21.83 -25.87 -24.
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. Each channel is outfitted with a balanced XLR connector and a barrier strip. These connectors are wired in parallel, which allows daisy chaining when needed.
CH and CL Series Power Amplifiers 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 Operation switch is set to 70V, only the negative and 70V connections on the barrier block have audio present. This provides power to distributed speakers in a high-impedance “constantvoltage” application.
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 standard input module. Each channel is outfitted with a balanced XLR/phone jack, and a barrier strip. These connectors are wired in parallel, which allows daisy chaining when needed.
CH and CL Series Power Amplifiers 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 performance. Following the error amp is the modulator stage where the audio signal is compared to an extremely accurate 250-kHz triangle waveform.
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.
CH and CL Series Power Amplifiers 6 Troubleshooting CONDITION: Power indicator is off. CONDITION: Fault indicator is on. POSSIBLE REASON 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. Verify that input levels and output impedances are within safe ranges. Turn off the Power switch and reset the circuit breaker.
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 CH1 CH2 CH4 450W 275W 300W 660W 400W 600W 1,400W 1,200W 600W 1,200W 1 kHz at rated THD 4 ohms 8 ohms 140V 900W 600W 1,320W 1,200W 2,800W 2,400W 2,400W Performance CH1 CH2 CH4 ± 0.1 dB ± 0.1 dB ± 0.
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.
CH and CL Series Power Amplifiers 7 Specifications Figure 7.1 Models CH1 & CH2 Frequency Response (Typical) +2 8ohm 4ohm +0 Figure 7.2 Model CL1 & CL2 Frequency Response (Typical) d B r -2 -4 -6 20 50 100 200 500 1k 2k 5k 10k 20k FREQUENCY (Hz) Figure 7.
CH and CL Series Power Amplifiers Figure 7.4 Models CH4 & CL4 Frequency Response (Typical) Figure 7.
CH and CL Series Power Amplifiers Figure 7.6 Models CH4 & CL4 Damping Factor (Typical) Figure 7.
CH and CL Series Power Amplifiers 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. The following assumptions or approximations were made: • The amplifier’s available channels are loaded, and full power is being delivered.
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.
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.
CH and CL Series Power Amplifiers 8 AC Power Draw and Thermal Dissipation CL2 LOAD 2 OHMS DUAL / 4 OHMS BRIDGE AC Mains Duty Power Cycle Draw (Watts) 1560 50% 1260 40% 30% 960 660 20% 10% 360 Current Draw(Amps) 100-120 230-240 15.6 7.8 12.6 9.6 6.6 6.3 4.8 3.3 3.6 1.
CH and CL Series Power Amplifiers 9 Service Crown amplifiers are quality units that rarely require servicing. Before returning your unit for service, please contact Crown Technical Support to verify the need for servicing. This unit has very sophisticated circuitry which should only be serviced by a fully trained technician. This is one reason why each unit bears the following label: CAUTION: To prevent electric shock, do not remove covers. No user serviceable parts inside.
CH and CL Series Power Amplifiers 10 Warranty UNITED STATES & CANADA SUMMARY OF WARRANTY 3 AR YE Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT 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.
CH and CL Series Power Amplifiers 10 Warranty 3 AR YE WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A.
CH and CL Series Power Amplifiers PRODUCT REGISTRATION Crown International 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 Phone: 574-294-8000 Fax: 574-294-8329 www.crownaudio.com 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. Crown International 1718 W Mishawaka Rd Elkhart IN 46517 Fax: 574-294-8329 Please note that some information is required.
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CH and CL Series Power Amplifiers Crown Audio Factory Service Information Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 PLEASE PRINT CLEARLY SRA #: __________________(If sending product to Crown factory service.
