Check the listing for details. Crest Audio CD 2000 Professional Power Amplifier (2000 Watts). Condition: Used. Listed at 999.99 USD. Product DescriptionCD 2000 2000W Power AmplifierThe CD 2000 Power Amplifier combines a linear power supply and a Class D output to deliver Crest power in a compact and cost-effective package. The CD 2000 is very versatile, whether powering nightclub systems or touring bands.A traditional linear power supply is used in CD Series amps. Because of the efficiency of the switching output stage, the transformer does not need to be big or heavy. This gives Crest's CD Series an advantage in delivering huge power in a compact rackmount package. The efficiency of the output stage also gives the power supply the ability to handle heavy duty cycles without compromising sonic integrity.Crest Audio's engineering has also maintained sonic quality while incorporating the advantages of a switching output stage. High-power Class-D topology is the key to its efficiency and low operating temperature. An additional advantage is its low power consumption.Features8 Ohm Stereo ? 560 W4 Ohm Stereo - 1000 W2 Ohm Stereo - 1200 W8 Ohm Bridged - 2000 WDramatically reduced net weightLinear power supply / Class D output stagesVery low current drawLatest generation of high-speed, mosfet output devicesCooled by variable-speed fan with back-to-front airflowInputs: balanced female XLR, 1/4" TRS combi jacksOutputs: Speakon and five-way binding postsMode selector switch for stereo, parallel and bridged-mono operationGround-lift switch and rear panel circuit breakerRecessed, stepped attenuators with removable knobs16-gauge steel chassis, cast aluminum front panelTourClass protection circuitsACL (Active Clip Limiting) prevents speaker damage by providing gentle gain reduction when signal approaches the clipping thresholdIGM (Instantaneous Gain Modulation) monitors speaker loads to detect conditions that may over-stress output devices, allowing safe operation into nominal 2 Ohm speaker loadsAUTORAMP gradually increases gain to the attenuator level-settings when the amplifier is turned on, preventing abrupt turn-on levelsOther protection features include: short circuit, DC voltage, comprehensive thermal management, current in-rush turn-on/off transient and sub/ultrasonic input Specifications:Model: CD 2000Stereo Power 8 Ohms: 560 WattsStereo Power 4/2* Ohms: 1000 WattsStereo Power 2 Ohm: 1200 WattsBridged Power 8/4* Ohm: 2000 Watts1kHz, 0.2% THD+N Power figures are watts per channel, both channels driven.*11kHz, 0.4% THD+N for 2 ohm stereo and 4 ohm bridged operation.Maximum output voltage: 72V rmsFrequency response 1W @ 8 ohms: 20Hz?20khz, +/-1dbPower bw rated power @ 4 ohms, 1% THD+N: 20Hz?20khz, +/-1dbTHD + N: 20kohms balanced, >10kohms unbalancedHum and noise: > -100db, A-weighted below rated power @ 4 ohmsCrosstalk: > -60db below max rated power (1khz)Class: DPower supply: Linear with toroid transformerCircuit breaker rating (120V/230V): 15A /10ACurrent draw (120VAC) 1/8 power, 4 ohms: 4.5A1/3 power, 4 ohms: 9.6AAt idle: 1.25AThermal emissions 1/3 Power, 4 ohms BTU / hr: 781Cooling: Back to front via variable speed DC faninput connectors: balanced female XLR, 1/4" TRS, unbalanced 1/4" TS on Neutrik combo connectorsoutput connectors: Five-way "touch-proof" binding posts and Neutrik Speakon connectors (which presentsboth outputs on the A Speakon for bi-amplified applications)controls: front panel: twin recessed stepped attenuators, power switchrear panel: signal ground-lift, mode select, gain select, circuit breakerLED indicators: signal level (5 element bargraph), protect, active, ACL / IGMConstruction: 16-gauge steel chassis, cast aluminum front panel - optional handles availableDimensions (W x H x D): 19" x 3.5" x 15.375" (483 x 89 x 391 mm)Weight: 40.9 lb (19 kg)