Crown Audio D-45, D-75A Welcome, Features, Detented level controls for precise repeat- ability

Page 5

D Series Power Amplifiers

 

30

 

30

OFF

ON

 

CHANNEL 1

CHANNEL 2

 

40

20

40

 

20

 

50

10

50

 

10

 

0

HEADPHONESLEVEL

IOC

SIGNAL

LEVEL

0

POWER

1 Welcome

Reliability is the first thing you get with your purchase of a Crown power amplifier. The D-45 and D-75A both deliver dependable operation with a wide variety of loads. Because of their exceptional reliability, these amplifiers have become the leading choice of professionals for use in recording studios, laboratories and pub- lic facilities. You can even find them on the road. Their sonic excellence also makes them a very good choice for your personal listening pleasure.

The D-45 and D-75A amplifiers are compact and provide ultra-low distortion for medium power applications. Crown’s advanced AB+B circuitry ensures efficient operation and pro- tects against shorted, open, mismatched or low-impedance loads that can affect any ampli- fier’s performance.

Modern power amplifiers are sophisticated pieces of engineering capable of producing extremely high power levels. They must be treated with respect and correctly installed if they are to provide the many years of reliable service for which they were designed.

In addition, D Series amplifiers include a num- ber of features which require some explanation before they can be used to their maximum advantage.

Please take the time to study this manual so that you can obtain the best possible service from your amplifier.

1.1 Features

Your dual-channel (stereo) amplifier can optionally be configured to deliver double the power from a single (mono) channel. It also provides the following features:

Powerful AB+B class circuitry yields maxi- mum efficiency with minimum crossover “notch” distortion.

IOC® (Input/Output Comparator) alerts of any distortion that exceeds 0.05% to pro- vide proof of distortion-free performance.

Signal presence indicators verify the pres- ence of amplifier output.

Detented level controls for precise repeat- ability.

Ultra-low harmonic and intermodulation distortion result in the best dynamic trans- fer function in the industry.

Very low noise and wide dynamic range.

High damping factor provides exceptional loudspeaker motion control.

Convection cooling system eliminates fan noise and maintenance.

Mounts in a standard 19-inch (48.3-cm) rack.

Front-panel headphone jack.

Three Year, No-Fault, Fully-Transferable Warranty completely protects your invest- ment and guarantees its specifications.

1.2 How to Use This Manual

This manual provides you with the necessary information to safely and correctly setup and operate your amplifier. It does not cover every aspect of installation, setup or operation that might occur under every condition. For addi- tional information, please consult Crown’s Amplifier Application Guide (available online at www.crownaudio.com), Crown Technical Sup- port, your system installer or retailer.

We strongly recommend you read all instruc- tions, warnings and cautions contained in this manual. Also, for your protection, please send in your warranty registration card today. And save your bill of sale — it’s your official proof of purchase.

Operation Manual

page 5

Image 5
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.