Crown Audio D-45, D-75A operation manual Service

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D Series Power Amplifiers

7 Service

Crown amplifiers are quality units that rarely require servicing. Before returning your unit for servicing, 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 techni- cian. This is one reason why each unit bears the fol- lowing label:

CAUTION: To prevent electric shock, do not remove covers. No user serviceable parts inside. Refer servicing to a qualified techni- cian.

7.1 Worldwide Service

Service may be obtained from an authorized service center. (Contact your local Crown/Amcron repre- sentative or our office for a list of authorized service centers.) To obtain service, simply present the bill of sale as proof of purchase along with the defective unit to an authorized service center. They will handle the necessary paperwork and repair.

Remember to transport your unit in the original fac- tory pack.

7.2 US and Canada Service

Service may be obtained in one of two ways: from an authorized service center or from the factory. You may choose either. It is important that you have your copy of the bill of sale as your proof of purchase.

7.2.1Service at a US or Canada Ser- vice Center

This method usually saves the most time and effort. Simply present your bill of sale along with the defective unit to an authorized service center to obtain service. They will handle the necessary paperwork and repair. Remember to transport the unit in the original factory pack. A list of authorized service centers in your area can be obtained from the Crown website at www.crownaudio.com, or by calling Crown Customer Service.

7.2.2 Factory Service

To obtain factory service, fill out the service infor- mation page found in the back of this manual and send it along with your proof of purchase and the defective unit to the Crown factory.

For warranty service, we will pay for ground ship- ping both ways in the United States. Contact Crown Customer Service to obtain prepaid shipping labels prior to sending the unit. Or, if you prefer, you may prepay the cost of shipping, and Crown will reim- burse you. Send copies of the shipping receipts to Crown to receive reimbursement.

Your repaired unit will be returned via UPS ground. Please contact us if other arrangements are required.

7.2.3Factory Service Shipping Instructions:

1.Before sending a Crown product to the factory for service, first call the Crown Service Depart- ment for a return authorization (RA) number.

2.Be sure to fill out the service information form that follows and enclose it with your shipment, either inside the box or in a packing slip enve- lope securely attached to the outside of the shipping carton. Do not send the service infor- mation form separately. If you are sending the unit from a Shipping Center, we recommend taping the form to the product. We also recom- mend recording the serial number and model before shipping for your reference.

3.To ensure the safe transportation of your unit to the factory, ship it in an original factory packing container. If you don’t have the original carton, you may obtain a product service foam-in- place shipping pack from the Crown Factory Service Department at the number listed below. For non-warranty service, you may also pro- vide your own shipping pack, however we still recommend using a Crown Supplied Shipping

Container. Minimum recommended require- ments for materials are as follows: 275 P.S.I. burst test Double-Wall carton that allows for 2- inch solid Styrofoam on all six sides of unit or 3 inches of plastic bubble wrap on all six sides of unit; securely seal the package with an ade- quate carton sealing tape. Do not use light boxes or “peanuts.” Damage caused by poor packing cannot be covered under warranty.

4.Do not ship the unit in any kind of cabinet (wood or metal). Ignoring this warning may result in extensive damage to the unit and the cabinet. Accessories are not needed—do not send the product documentation, cables and other hardware.

If you have any questions, please contact Crown Factory Service.

Crown Factory Service

1718 W. Mishawaka Rd.,

Elkhart, Indiana 46517 U.S.A.

Telephone: 574-294-8200 800-342-6939 (North America, Puerto Rico, and Virgin Islands only)

Facsimile:

574-294-8301 (Technical Support)

574-294-8124 (Factory Service)

Internet:

http://www.crownaudio.com

Operation Manual

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Contents Some models may be exported under the name Amcron 75ASeries amplifiers require Class 2 output wiring Important Safety InstructionsWatch for These Symbols Use only with a cart, stand, bracket, or tableDeclaration of Conformity Safety StandardCrown International, Inc European Representative’s Name and AddressTable of Contents How to Use This Manual FeaturesWelcome Detented level controls for precise repeat- abilityManual SetupUnpack Your Amplifier Install Your Amplifier Crown recommends using professionally con- structed, high Choose Input Wire ConnectorsChoose Output Wire and Connectors Inputs Connect input wiring only to CH Wire Your System Dual ModeBridge-Mono Mode Startup Procedure AC Mains Voltage Configura TionConnect to AC Mains Turn up the level of your audio source to an optimum levelOperation PrecautionsFront and Back Views Controls, Indicators and Con- nectorsControls IndicatorsFuse Replacement Input-Sensitivity Option ProtectionOptions Bridge-Mono Option Condition Power indicator is off TroubleshootingSpecifications Bridge-Mono 105 145 KHz 20 Hz 50 Hz DualKHz 50 Hz KHz 20 Hz Dual 120Service Warranty Worldwide Except USA & Canada Items Excluded from this CROWN- WarrantySeries Power Amplifiers Nature of Problem Crown Factory Service InformationThis page Intentionally Left Blank Series Power Amplifiers

D-45, D-75A specifications

Crown Audio has earned its reputation as a leader in professional audio solutions, with a commitment to delivering high-quality amplifier technology that meets the demands of audio professionals across various applications. Two notable models in their lineup are the Crown D-75A and D-45, both of which embody unique features that are tailored for versatility and superior performance.

The Crown D-75A is a high-performance power amplifier designed for applications where exceptional sound quality is essential. With an output power of 75 watts per channel into 8 ohms, this amplifier is capable of driving a wide range of loudspeakers, making it an excellent choice for installations in commercial venues or high-end residential systems. One of its standout features is the ability to operate in both stereo and bridged mono modes, allowing for flexible configuration options. The D-75A also incorporates Crown’s patented Class I technology, which enables it to maintain high efficiency while minimizing distortion and heat generation.

On the other hand, the Crown D-45 offers a slightly lower output power, rated at 45 watts per channel into 8 ohms. Despite its smaller size, the D-45 packs a punch with its robust performance and advanced technologies. This amplifier is well-suited for smaller venues or as a part of an audio system where space is a concern. Just like the D-75A, the D-45 features the ability to run in stereo or bridged mono modes, providing users with flexibility in setup.

Both amplifiers incorporate user-friendly front-panel controls, including level adjustments and power indicators, allowing for easy operation and monitoring. Furthermore, they are engineered with short-circuit and thermal overload protection, ensuring longevity and reliability in demanding environments.

In terms of connectivity, the D-75A and D-45 come equipped with professional-grade XLR and RCA input options, facilitating seamless integration into various audio systems. Their durable construction is designed to withstand the rigors of professional use, while also being aesthetically pleasing for any installation.

In conclusion, the Crown Audio D-75A and D-45 amplify the brand’s commitment to quality and innovation, providing professionals with dependable solutions that do not compromise on sound fidelity. Whether for a small venue or a large installation, these amplifiers deliver the performance and features audio engineers seek, making them an excellent choice in the competitive world of sound reinforcement.
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