Table of Contents
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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.
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 and Amcron 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
126781-5A
3/06
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Table of Contents
Related Manuals for Crown M Series
Summary of Contents for Crown M Series
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Page 1: Operation Manual
Trademark Notice: Crown and Amcron 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 126781-5A 3/06... -
Page 2: Important Safety Instructions
M Series Power Amplifiers IMPORTANT M Series amplifiers require Class 2 output wiring. Les amplificateurs de série de M exigent des câbles de sortie de classe 2. M-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrah- tung. -
Page 3: Declaration Of Conformity
M Series Power Amplifiers Crown International, Inc. Issued By: Crown International, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A. European Representative's Name and Address: Nick Owen 35, Bassets Field Thornhill Cardiff. South Glamorgen CF14 9UG United Kingdom Equipment Type: Commercial Audio Power Amplifiers... -
Page 4: Table Of Contents
3.1 Precautions ... 11 3.2 Front Panel Controls and Indicators ... 13 3.3 Back Panel Controls and Connectors... 13 page 4 M Series Power Amplifiers 4 Advanced Features and Options ...14 4.1 Crown SST Modules ... 14 4.2 Fault Monitoring ... 14 4.3 Barrier Block Outputs ... -
Page 5: Welcome
• Advanced protection circuitry guards against shorted outputs, open circuits, DC, mis- matched loads, general overheating, high-fre- ® The M Series of power amplifiers from Crown quency overloads and internal faults. represents a new era in affordable, quality power amplification. The line consists of two •... -
Page 6: Setup
NOTE: When transporting, amplifiers should be supported at both front and back. Figure 2.1 Dimensions M Series Power Amplifiers 2.3 Ensure Proper Cooling When using an equipment rack, mount units directly on top of each other. Close any open spaces in rack with blank panels. DO NOT block front, rear or side air vents. -
Page 7: Choose Input Wire And Connectors
M Series Power Amplifiers 2 Setup 2.4 Choose Input Wire and Connectors Crown recommends using pre-built or professionally wired, bal- anced 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. -
Page 8: Wire Your System
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;... -
Page 9: Bridge-Mono Mode
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 connec- tor. NOTE: Crown provides a reference of wiring pin... -
Page 10: Connect To Ac Mains
If you are unsure of the output voltage of your AC mains, please consult your electrician. page 10 M Series Power Amplifiers 2.8 Startup Procedure Use the following procedure when first turning on your amplifier: 1. Turn down the level of your audio source. -
Page 11: Operation
M Series Power Amplifiers 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 12 (FOR +) AND CH2+, (FOR -) ONLY RISK OF ELECTRIC SHOCK ® M. Neutrik Speakon Outputs Figure 3.1 Front Panel and Back Panel Controls, Indicators and Connectors M Series Power Amplifiers E. Ch-1 Level Control E. Ch-2 Level Control Clip Clip Fault Fault...
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Page 13: Front Panel Controls And Indicators
M Series Power Amplifiers 3 Operation 3.2 Front Panel Controls and Indicators A. Power Switch Switch turns the amplifier on (“ (“ 0 ”). B. Reset Switch This front-panel pushbutton is used to reset the circuit breaker that protects the power supply. -
Page 14: Advanced Features And Options
The maximum signal that can be exposed to the fault jack is 35 VDC and 10 mA. Best results are obtained with 10 mA LEDs. Figure 4.1 Fault Status LED Circuitry M Series Power Amplifiers Figure 4.2 RJ Jack Wiring and Pin Assignments Operation Manual... -
Page 15: Advanced Features
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... -
Page 16: Principles Of Operation
LOGIC FAULT CONNECTOR MUTE M Series Power Amplifiers last voltage amplifier, in conjunction with a bootstrapped current source, drives both pre- drivers and the bias servo. The bias servo is mounted in such a way as to translate the out-... - Page 17 M Series Power Amplifiers 5 Principles of Operation The output transistors are protected by the Time Dependent Voltage & Current circuit. This cir- cuit 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.
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Page 18: Troubleshooting
Fault jack located on the ampli- fier back panel. See the Advanced Features and Options section for more detail. M Series Power Amplifiers CONDITION: Distorted sound. POSSIBLE REASON: • Load is wired incorrectly or Stereo/Mono mode switch is set incorrectly. -
Page 19: Specifications
M Series Power Amplifiers 7 Specifications Minimum Guaranteed Power 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 Performance Sensitivity (volts RMS) for full rated power at 8 ohms... - Page 20 RS-310B), 5.25-inch (13.34-cm) height and 12.25-inch (31.11-cm) depth behind front 12.25-inch (31.11-cm) depth behind front mounting surface mounting surface 32.6 pounds (14.79 kg) 40.3 pounds (18.28 kg) 38.6 pounds (17.49 kg) 46.3 pounds (20.98 kg) M Series Power Amplifiers > 400 Operation Manual...
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Page 21: Service
8.2.5 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 22: Warranty
DISCLAIMER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS CONTAINED IN THIS MANUAL YOU ARE NOT ENTITLED TO RECOVER FROM FOR CROWN PRODUCTS. US ANY INCIDENTAL DAMAGES RESULTING M Series Power Amplifiers 12/01 Operation Manual... - Page 23 M Series Power Amplifiers 9 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...
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Page 25: Crown Audio Factory Service Information
M Series Power Amplifiers 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. Boxes): _____________________________________________________________________________________________________________________________________________________... - Page 26 M Series Power Amplifiers THIS PAGE INTENTIONALLY LEFT BLANK page 26 Operation Manual...
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