Controls

Level: A detented rotary level control for each channel located on the rear panel.

Power: An on/off rocker switch located on the front panel.

Mode: A two-position switch located on the back panel which, when turned to “Stereo,” operates the amplifier as two independent channels. When “Bridge” is selected, the amplifier bridges the two output channels for twice the output voltage.

Channel Operation Switch: A two-position switch located on the back panel which, when turned to 4/8 Ohm, sets the amplifier to drive low-imped- ance speaker loads. Turning the switch to 70V sets the amplifier to drive distributed high-impedance speaker loads and inserts a 70 Hz high-pass filter into the signal chain to prevent step-down transformer saturation.

Indicators

Signal: A green indicator for each channel which flashes when a very low-level signal (> –40 dBm) is present at input. May be used for troubleshooting cable runs.

Clip: A red indicator for each channel which turns on when distortion becomes audible in the amplifier output.

Fault: A red indicator for each channel which indi- cates amplifier has muted output. Normally off. Status may be monitored remotely by plugging into back- panel RJ-11 Fault jack.

Power: A blue indicator that turns on when the ampli- fier has been turned on and has power.

Input/Output

Input Connector (standard module): One per chan- nel, 3-pin female XLR connector, in parallel with a barrier strip termination.

Input Stage: Input is electronically balanced and employs precision 1% resistors.

Input Impedance (nominal): 20 k ohms, balanced. 10 k ohms, unbalanced.

Input Sensitivity: Channel independent. Factory set at

1.4volts for standard 1 kHz, 8 ohm power. 26 dB gain and 0.775 volt sensitivity available as a Service Option.

Output Impedance: See Figure 1.

Output Connectors: Four-terminaltouch-proof barrier block, one per channel.

Output Signal:

Stereo: Unbalanced, two-channel.

Bridge-Mono:Balanced, single-channel. Channel 1 controls are active; Channel 2 should be turned down.

Protection

Contractor Series amplifiers are protected against shorted, open or mismatched loads; overloaded power supplies; excessive temperature, chain destruction phenomena, input overload damage and high-frequency blowups. They also protect loudspeak- ers from input/output DC, large or dangerous DC off- sets and turn-on/turn-off transients.

CH1

CH2

CH4

Options

Service Options: SST-4622, SST-3632, SST-4632— custom two-channel crossover networks with equal- ization and delay purposely engineered for use with JBL model 4622, 3632 and 4632 cinema speakers. SST-SBSC 3632T, SST-SBSC 4632T—custom three- channel crossover networks with CD-horn equaliza- tion and mono-summed low-frequency outputs similarly designed for use with JBL model 3632T and 4632T cinema speakers.

Construction

Rugged steel chassis is formed into a durable package, then finished with environmentally friendly powder coat for long life and ease of maintenance.

Cooling: Proportional speed fan in CH1 and CH2; 3-speed fan in CH4.

Dimensions:

Width: EIA Standard 19-inch rack mount (EIA RS- 310-B).

Height: 5.25 inches (13.34 cm).

Depth (behind front mounting surface):

CH1 and CH2: 12.25 inches (31.11 cm) to back of amplifier.

CH4: 16.25 inches (36.56 cm) to back of amplifier.

CH4: 17.5 inches (14.45 cm) from back of front rack ears to back of speaker-terminal cover.

Net Weight:

CH1: 40.6 lb (18.4 kg).

CH2: 48.3 lb (18.5 kg).

CH4: 33.4 lb (15.1 kg).

For shipping weight, add 6 lb (2.7 kg).

CH1, CH2

CH4

Figure 1 CH1, CH2, and CH4 Output Impedance

Crown’s Three-Year, No-Fault, Fully Transferable Warranty

Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown amplifier—an unsur- passed industry standard. With this unprecedented No-Fault protection, your new Crown amplifier is warranted to meet or exceed original specifications for the first three years of ownership. During this time, if your amplifier fails, or does not perform to original specifications, it will be repaired or replaced at our expense. About the only things not covered by this warranty are those losses normally covered by insurance and those caused by intentional abuse. And the coverage is transferable, should you sell your amplifier.

See your authorized Crown dealer for full warranty disclosure and details. For customers outside of the USA, please contact your authorized Crown distributor for warranty information or call 574-294-8200.

Crown Audio, Inc.

1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 TEL: 574-294-8200 FAX: 574-294-8FAX www.crownaudio.com

Specifications subject to change without prior notice. Latest information available at www.crownaudio.com.

Crown and Crown Audio are registered trademarks of Crown International. Other trademarks are the property of their respective owners. Printed in U.S.A.

©2005 Crown Audio®, Inc.

9/05

136706-1F

 

 

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Crown Audio CH2, CH3, CH1 specifications Controls, Indicators, Input/Output, Protection, Options, Construction

CH2, CH1, CH3 specifications

Crown Audio is renowned for its high-performance amplifiers that meet the needs of various professional audio applications. The CH series, which includes the CH1, CH2, and CH3 models, exemplifies this commitment to quality and innovation. These amplifiers are designed for both installed and portable applications, offering a blend of reliability, power, and advanced features.

The Crown CH1 is a single-channel amplifier that delivers pristine sound quality and ample power for smaller setups. It features a lightweight design, making it easy to transport, and its efficient Class D circuitry ensures high output with minimal heat generation. This model is particularly suited for small venues, where space and power efficiency are essential. It also includes a built-in limiter, helping to protect connected speakers from overdriving, thus extending their lifespan.

The CH2 model ups the ante with its dual-channel output, making it ideal for medium-sized venues or installations that require a little more power. Its sophisticated DSP (Digital Signal Processing) capabilities allow for extensive customization of audio performance. Users can tailor settings to optimize sound for specific environments. The CH2 also features comprehensive protection circuitry, which includes short-circuit, thermal, and overload protection, ensuring the amplifier operates safely and effectively under all conditions.

Finally, the CH3 expands further on the CH2's capabilities with even greater power output and additional advanced features. This model is designed to handle larger systems and more demanding audio environments. The CH3 boasts a robust power supply and increased headroom, allowing it to drive heavy loads without distortion. Its advanced cooling system is engineered to keep temperatures in check, which is crucial for maintaining performance during extended use.

All three models in the Crown CH series share common characteristics, such as rugged construction and an easily accessible front panel for straightforward operation. They are equipped with XLR inputs and Speakon outputs, providing flexibility in connectivity. With their high-efficiency designs, these amplifiers are not only powerful but also energy-conscious choices for audio professionals.

In summary, the Crown CH series—comprising the CH1, CH2, and CH3—offers a versatile and powerful solution for audio amplification, suited to a wide range of professional applications. Whether for small gigs, medium events, or large installations, these amplifiers deliver exceptional sound quality and reliability that audio engineers and performers can trust.