Crown Audio D-45, D-75A Connect to AC Mains, AC Mains Voltage Configura Tion, Startup Procedure

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D 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.

WARNING: The third prong of this con- nector (ground) is an important safety feature. Do not attempt to disable this ground connection by using an adapter or other methods.

Amplifiers don’t create energy. The AC mains voltage and current must be sufficient to deliver the power you expect. You must operate your amplifier from an AC mains power source with not more than a 10% variation above or a 15% variation below the amplifier’s specified line voltage and within the specfied frequency requirements (indicated on the amplifier’s back panel label). If you are unsure of the output voltage of your AC mains, please consult your electrician.

2.7.1AC Mains Voltage Configura-

tion

North American 120 VAC, 60 Hz units have a standard three wire, grounded AC plug as specified by UL requirements. The 120 volt models and the European models have the appropriate plug. The other 200, 220 and 240 volt models have a North American 120 volt plug. The installer must cut off the plug and supply and install a plug appropriate for the installation. Note: Crown assumes no liability whatsoever for ungrounded operation, nor for violation of UL or local electrical codes.

120 VAC, 60 Hz North American units do not have a convertible transformer, and cannot be

used at other voltages and frequencies. Interna- tional units can be operated with an AC mains frequency of 50 to 400 Hz, and can be config- ured by an authorized Crown Service Center for five different line voltages: 100, 120, 200, 220 and 240 VAC. The back panel sticker indicates the unit’s factory configuration.

To alter your amplifier’s AC mains voltage con- figuration, take the unit to an authorized Crown Service Center.

2.8 Startup Procedure

Use the following procedure when first turning on your amplifier:

1.Turn down the level of your audio source.

2.Turn down the Level controls of the ampli- fier.

3.Turn on the “Power” switch. The Power indicator should glow.

4.Turn up the level of your audio source to an optimum level.

5.Turn up the Level controls on the amplifier until the desired loudness or power level is achieved.

6.Turn down the level of your audio source to its normal range.

If you ever need to make any wiring or installa- tion changes, don’t forget to disconnect the power cord.

For help with determining your system’s opti- mum gain structure (signal levels) please refer to the Crown Amplifier Application Guide, available online at 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- abilitySetup Unpack Your Amplifier Install Your AmplifierManual Choose Input Wire Connectors Choose Output Wire and ConnectorsCrown recommends using professionally con- structed, high Wire Your System Dual Mode Bridge-Mono ModeInputs Connect input wiring only to CH 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- nectorsIndicators Fuse ReplacementControls Protection Options Bridge-Mono OptionInput-Sensitivity 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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