AES 2003: Crest Audio Pro 9200 Power Amplifier

Nov 4, 2003 12:00 PM, Editors


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Crest added to its Pro 200 power amplifier series with the Pro 9200 (pictured). The four Pro 200 amplifiers occupy two rackspaces and weigh 25 pounds. The Pro 9200 boasts 2,100 watts per channel (6,500 watts bridge mode) into 4 ohms, while the Pro 8200 offers 1,450 watts per channel (4,500 watts bridge mode); the Pro 7200 provides 1,000 watts per channel (3,300 watts bridge mode); and the Pro 5200 has 525 watts per channel (1,800 watts bridge mode).

Apart from the differences in power, the three new amplifiers have similar specs, including a frequency response within +0, -3dB from 10 to 100 kHz, with hum and noise better than –110 dB “A” weighted. The input impedance is 15k ohms balanced.

The Pro 200 Series amps feature Automatic Clip Limiting (ACL) to protect connected drivers, while IGM Impedance Sensing automatically modifies the gain to suit whichever impedance outputs are connected. IGM allows more efficient operation and loads as low as 2 ohms, as well as short-circuit protection. Tunnel-cooled, high-efficiency heat sinks and variable-speed DC fans limit the operating temperature. Automatic temperature-sensing systems monitor the temperature of the air as the rear-mounted cooling fans funnel it to the front-panel exhaust and shut down a channel if temperatures exceed operating limits. AutoRamp circuitry minimizes power-up “thumps.”

Input connections are via XLR on the rear panel and are actively balanced. Both Speakon and binding post output connections are provided per channel. Front-panel controls include input attenuators and a combination of AC power switch/circuit breaker. Five front-panel LEDs per channel indicate ACL, signal, temperature protect, DC protect (lights when a DC voltage is sensed) and Active (output relay closed and operational). On the rear panel, a mode switch determines stereo, parallel or bridged mono mode, while a gain select switch determines whether the overall amplifier gain structure is x20 or x40.

The Crest Pro 200 Series have U.S. MSRPs of: Pro 200, $TBA; Pro 8200, $2,630; Pro 7200, $1,970; and Pro 5200, $1,600.

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