M Series M120 1 1 Operation Manual M240 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.
M Series Power Amplifiers Important Safety Instructions Wichtige Sicherheitsinstruktionen Importantes Instructions de Sécurité Instrucciones de Seguridad Importantes 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 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.
M Series Power Amplifiers DECLARATION of CONFORMITY Crown International, Inc. Issued By: Crown International, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A. FOR COMPLIANCE QUESTIONS ONLY: Sue Whitfield 574-294-8289 swhitfield@crownintl.com European Representative's Name and Address: Nick Owen 35, Bassets Field Thornhill Cardiff.
M Series Power Amplifiers Table of Contents page 4 Important Safety Instructions .......................................................2 4 Advanced Features and Options .........................14 Declaration of Conformity ............................................................3 4.1 Crown SST Modules ..................................................... 14 1 Welcome .................................................... 5 4.2 Fault Monitoring .....................................................
M Series Power Amplifiers * 1 Welcome The M Series of power amplifiers from Crown® represents a new era in affordable, quality power amplification. The line consists of two models in a uniform, rugged chassis, incorporating the best of tried-and-true design principles and innovative features. Modern power amplifiers are sophisticated pieces of engineering capable of producing extremely high power levels.
M 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. We also recommend that you save all packing materials so you will have them if you ever need to transport the unit.
M Series Power Amplifiers 2 Setup 2.4 Choose Input Wire and Connectors Crown recommends using pre-built or professionally wired, balanced line (two-conductor plus shield), 22-24 gauge cables and connectors. Depending upon which amplifier input you choose, you should use either 3-pin male XLR connectors, TRS phone connectors, or terminal forks at the amplifier inputs. Unbalanced line may also be used but may result in noise over long cable runs.
M Series Power Amplifiers 2 Setup 2.6 Wire Your System 2.6.1 Stereo Mode Typical input and output wiring is shown in Figure 2.7. INPUTS: Connect input wiring for both channels. OUTPUTS: Maintain proper polarity (+/–) on output connectors. Connect Channel-1 loudspeaker’s positive (+) lead to Channel-1 positive (red) terminal of amp; repeat for negative (–). Repeat Channel 2 wiring as for Channel 1.
M Series Power Amplifiers 2 Setup 2.6.2 Bridge-Mono Mode Typical input and output wiring is shown in Figure 2.9. Set the Mode Switch to Bridge. INPUTS: Use only the Channel-1 input connector. NOTE: Crown provides a reference of wiring pin assignments for commonly used connector types in the Crown Amplifier Application Guide available at www.crownaudio. OUTPUTS: If you are using the 5-way binding posts, connect the speaker across the red binding post of each channel.
M Series Power Amplifiers 2 Setup 2.7 Connect to AC Mains Connect your amplifier to the AC mains power source (power outlet) with the supplied AC power cordset. First, connect the IEC end of the cordset to the IEC connector on the amplifier; then, plug the other end of the cordset to the AC mains. 2.8 Startup Procedure Use the following procedure when first turning on your amplifier: WARNING: The third prong of this connector (ground) is an important safety feature.
M 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.
M Series Power Amplifiers 3 Operation E. Ch-1 Level Control Reset I 1 Power A. Power Switch B. Reset Switch F. Barrier Block Inputs E. Ch-2 Level Control G. Neutrik Combo (1/4-inch & XLR) Inputs Signal Clip Fault 2 Signal Clip D. Ch-1 Signal, Clip& Fault Indicators C. Power Indicator H. 5-way Binding Post Output Connectors Fault D. Ch-2 Signal, Clip & Fault Indicators I.
M Series Power Amplifiers 3 Operation 3.2 Front Panel Controls and Indicators 3.3 Back Panel Controls and Connectors A. Power Switch F. Barrier Block Inputs: May be wired balanced or unbalanced. Switch turns the amplifier on (“ | ”) or off (“ 0 ”). B. Reset Switch This front-panel pushbutton is used to reset the circuit breaker that protects the power supply. C. Power Indicator Green LED indicates amplifier has been turned on and AC power is available. D. Signal, Clip and Fault Indicators G.
M Series Power Amplifiers 4 Advanced Features and Options 4.1 Crown SST Modules Crown optional SST (System Solution Topologies) modules were specially designed to improve the versatility of your audio system. They feature a variety of professional signal routing and filtering capabilities, with active crossovers that allow the audio signal to be split and sent to auxiliary amplifiers.
M Series Power Amplifiers 4 Advanced Features and Options 4.3 Optional Barrier Block Outputs If you prefer, the 5-way binding post outputs on your M-Series amplifier can be replaced with model CEAS1 barrier block outputs (see Figure 4.3). You can order your M-Series amplifier with barrier block outputs factory-installed on new amplifiers or they can be added to existing M-Series amplifiers by an authorized Crown Service Center.
M Series Power Amplifiers 5 Principles of Operation For the sake of simplicity, only channel one of the amplifier is described. last voltage amplifier, in conjunction with a bootstrapped current source, drives both predrivers and the bias servo. The bias servo is mounted in such a way as to translate the output heatsink temperature into a controlled bias current to prevent thermal runaway and hold the amplifier’s notch distortion to a minimum.
M Series Power Amplifiers 5 Principles of Operation The output transistors are protected by the Time Dependent Voltage & Current circuit. This circuit protects the devices from extending beyond their safe area of operation, but allows the devices to provide high bursts of peak power with music, allowing your amplifier to deliver more punch.
M Series Power Amplifiers 6 Troubleshooting CONDITION: Power indicator is off. CONDITION: Distorted sound. POSSIBLE REASON: POSSIBLE REASON • Load is wired incorrectly or Stereo/Mono mode switch is set incorrectly. Check both. • Input signal level is too high. Turn down your amplifier level controls, or turn down the input signal, until the clip LED goes out. • The amplifier has lost AC power. • The amplifier’s Power switch is off. • The amplifier’s power cord is not plugged in at either end.
M Series Power Amplifiers 7 Specifications Minimum Guaranteed Power M120 M240 1 kHz with 0.5% THD Stereo, 2 ohms (per ch.) Stereo, 4 ohms (per ch.) Stereo, 8 ohms (per ch.) Bridge mono, 4 ohms Bridge mono, 8 ohms 570W 465W 285W 1,120W 920W 1,000W 680W 405W 2,000W 1,380W Performance M120 M240 1.4 V, switchable to 26 dB gain 1.4 V, switchable to 26 dB gain ± 0.2 dB ± 0.
M Series Power Amplifiers 7 Specifications Performance M120 M240 Damping Factor (8 ohm): 10 Hz to 400 Hz > 400 > 400 Crosstalk (below rated power, 20 Hz to 20 kHz) > 55 dB > 55 dB Common Mode Rejection (CMR)(20 Hz to 1 kHz) > 70 dB > 70 dB DC Output Offset (Shorted input) ± 10 mV ± 10 mV 20 kilohms, 10 kilohms 20 kilohms, 10 kilohms 2-8 ohms 4-8 ohms 2-8 ohms 4-8 ohms 30.5-dB gain at 1.4-volt sensitivity 26-dB gain at 2.34-volt sensitivity 32.1-dB gain at 1.
M Series Power Amplifiers 8 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.
M Series Power Amplifiers 9 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.
M Series Power Amplifiers 9 Warranty 3 AR YE WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY WHAT THE WARRANTOR WILL DO Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A.
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M 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.
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