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Crown D-45 Reference Manual

D series
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40
50
HEADPHONES
LEVEL
40
50
HEADPHONES
LEVEL
© 1996 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone:
219-294-8000. D Series amplifiers are produced by the Professional Audio Division of Crown
International, Inc. Trademark Notice: Amcron ,
International, Inc. Other trademarks are the property of their respective owners.
E106377
®
Applies only to 120 VAC
North American units.
30
30
CHANNEL 1
CHANNEL 2
20
40
20
10
50
10
IOC
0
0
SIGNAL
LEVEL
30
30
CHANNEL 1
CHANNEL 2
20
40
20
10
50
10
IOC
0
0
SIGNAL
LEVEL
D-45 & D-75A
Some models may be exported under the name Amcron .
Models:
®
Crown
®
and IOC
®
are registered trademarks of Crown
OFF
ON
POWER
OFF
ON
POWER
®
Printed on
recycled paper.
100668-1
10/96

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Summary of Contents for Crown D-45

  • Page 1 LEVEL LEVEL POWER Models: D-45 & D-75A Some models may be exported under the name Amcron . ® © 1996 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-294-8000. D Series amplifiers are produced by the Professional Audio Division of Crown International, Inc.
  • Page 2 SUMMARY OF WARRANTY The Crown Audio Division of Crown International, Inc., 1718 West The Crown Audio Division of Crown International, Inc., 1718 West Mishawaka Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL...

  • Page 3: Magnetic Field

    If your unit bears the name “Amcron, ” please substitute it for the name “Crown” in this manual. 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.
  • Page 4 D-45 / D-75A Power Amplifiers Page 4...
  • Page 5 Reliability is the first thing you get with your purchase for shipping damage. Even if the unit arrived in perfect of a Crown power amplifier. The D-45 and D-75A both condition, as most do, save all packing materials so deliver dependable operation with a wide variety of you will have them if you ever need to transport the loads.

  • Page 6: Installation

    D-45 / D-75A Power Amplifiers 2 Installation D-45 and D-75A amplifiers are designed for standard tors are located on the back panel. If you are making changes to a unit that is already installed, make sure 19 inch (48.3 cm) rack mounting, or they can be stacked without a cabinet.

  • Page 7: Dual Mode

    D-45 / D-75A Power Amplifiers DUAL MODE FROM THE FACTORY, YOUR AMPLIFIER IS CONFIGURED FOR DUAL OPERATION MIXER CHANNEL 2 CHANNEL 1 REMPLACER CH-2 INPUTS CH-1 SEULMENT XLR WIRING PHONE WIRING CH-2 CH-1 IMPORTANT: OUTPUTS REPLACE ONLY WITH IN MONO MODE USE –...
  • Page 8 D-45 / D-75A Power Amplifiers 2.3.3 Output Connection voltages and frequencies. International units can be There are many methods that can be used to prevent operated with an AC mains frequency of 50 to 400 Hz, potential output problems, but the most important pre- and can be configured for five different line voltages: ventative measure is to use good common sense.

  • Page 9: Operation

    1. When the level of an input source is uncertain, 11. The D-45 and D-75A amplifiers are not recom- or an audio component has not previously been used with your amplifier, always begin with the mended for use at frequencies above 30 kHz.

  • Page 10: Fuse Replacement

    D-45 / D-75A Power Amplifiers The amplifier is switched between dual and bridge- current. So in the extremely unlikely event of a device mono operation with the dual/mono jumper located in- failure, the amplifier will prevent further damage. The side the amplifier (see Appendix A).

  • Page 11: Specifications

    D-45 / D-75A Power Amplifiers Bridge-Mono mode: 4 Specifications 70 watts into 8 ohms. Note: The following specifications apply to all units in dual 50 watts into 16 ohms. mode with both channels driven into 8 ohm loads and an input sensitivity of 26 dB gain unless otherwise specified.

  • Page 12: Output Signal

    Dual: Unbalanced, two channel. Approximate Weight: D-45: 8 pounds, 11 ounces (3.9 kg) net; 10 pounds, Bridge-Mono: Balanced, single channel. Channel 1 9 ounces (4.8 kg) shipping weight. controls are active; channel 2 controls should be turned down.
  • Page 13 D-45 / D-75A Power Amplifiers Crown specifications are guaranteed for three years. In an effort to provide you with as much information as possible about the power-producing capabilities of your amplifier, we have created the following power matrix. The specifications found in these tables are for 120 VAC, 60 Hz North American units and are guaranteed for three years.

  • Page 14: Worldwide Service

    D-45 / D-75A Power Amplifiers 5 Service This unit has very sophisticated circuitry which should sent “UPS ground.” (If the unit is under warranty, you only be serviced by a fully trained technician. This is may send it C.O.D. for the cost of freight via UPS one reason why each unit bears the following label: ground.) The factory will return it via UPS ground.

  • Page 15: Nature Of Problem

    D-45 / D-75A Power Amplifiers 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: 1-219-294-8301 Owner’s Name: _________________________________________________________________________ Shipping Address: ______________________________________________________________________ Phone Number: _____________________________...
  • Page 16 D-45 / D-75A Power Amplifiers Page 16...

  • Page 17: Internal Settings

    A.1.2 and A.1.3 to help determine whether you 0.632 volts for the D-45 , and 0.837 volts for the D-75A . Fig. A.1 Main Circuit Board (Component Side)—Jumper and Resistor...
  • Page 18 Then, use the instructions that follow specifi- bridge-mono mode also provides an easy power and cally for a D-45 or D-75A amplifier. Refer to Figure A.1 performance upgrade path for stereo applications. A for help finding the jumper and resistor locations.

This manual is also suitable for:

D-75a

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