Crest audio CD1000, CD3000, CD2000, CD1500 DATASHEET

SERIES

Features Description

• Dramatically reduced net weight

• Linear power supply / digital output stages

• Very low current draw

• Latest generation of high-speed, mosfet output devices

• Cooled by variable speed fan with back-to-front airflow

• Inputs - Balanced female Neutrik XLR, 1/4” TRS combo jacks

• Outputs - Neutrik Speakon and 5-way “touch-proof” binding posts

• Mode selector switch for stereo, parallel and bridged-mono operation

• Ground-lift switch and rear panel circuit breaker

• Recessed, stepped attenuators with removable knobs

• 16-gauge steel chassis, cast aluminum front-panel

TourClass®protection circuits

ACL (Active Clip Limiting) prevents speaker damage by providing

gentle gain reduction when signal approaches the clipping threshold.

IGM (Instantaneous Gain Modulation) monitors speaker loads to detect conditions that may overstress output devices. This allows safe operation into nominal 2 ohm speaker loads.

AUTORAMP gradually increases gain to the attenuator level-settings when the amplifier is turned on. This prevents abrupt turn-on level.

Other protection features include: short circuit, dc voltage, comprehensive thermal management, current in-rush turn-on/off transient, and sub/ultrasonic input.

The CD Series amplifier is the next generation family of elevated efficiency amplification from Crest Audio. With sonic performance the primary priority, the CD Series uses a combination of a linear power supply and a class D output to deliver Crest Power in a compact and cost-effective package.

A full complement of features and power-points makes this series very versatile, whether powering nightclub systems or high school gymnasiums. The CD series amplifiers bring a new generation of amplification to Crest Audio.

Linear-toroid power supply

A traditional linear power supply is used in the CD Series. Because of the efficiency of the switching output stage, the transformer does not need to be as big or as heavy. This gives the CD Series an advantage in delivering more power in a more compact package. The efficiency of the output stage also gives the power supply the ability to handle heavy-duty cycles without compromising sonic integrity.

Switching output stage

Crest Audio’s engineering has maintained sonic quality while incorporating the advantages of a switching output stage. The high-power class D topology is the key to its efficiency and low operating temperature. An additional advantage to this design is the amount of power needed over time. This amplifier will dramatically reduce the number of kW / hr needed to operate.

power specifications 8Ω stereo 4Ω / 2Ω1stereo 8Ω / 4Ω1bridged

CD3000 800W 1500W 3000W CD2000 560W 1000W 2000W CD1500 400W 750W 1500W CD1000 280W 500W 1000W

1kHz, 0.2% THD+N / 12Ω stereo and 4Ω bridged operation at 1kHz, 0.4% THD+N

CD1000 - CD3000

Power Amplifiers

(CD3000 model shown)

Specifications

CD Series Power Amplifiers

stereo power 8 ohms

4 / 21ohms

bridged mono power 8 / 4

ohms

maximum output voltage

frequency response 1W @ 8 ohms

power bw rated power @ 4 ohms, 1% THD+N

THD + N

imd; SMPTE/DIN 4:1 (60 Hz / 7 KHz)

damping factor

input CMRR

gain / input sensitivity @ 4 ohms

input impedance

hum and noise

crosstalk

class

power supply

circuit breaker rating (120V/230V)

current draw (120VAC) 1/8 power, 4 ohms

1/3 power, 4 ohms

at idle

thermal emissions 1/3 Power, 4 ohms btu / hr

cooling

input connectors

output connectors

controls

LED indicators

construction

dimensions

weight

warranty

CD1000 CD1500 CD2000 CD3000

280W 400W 560W 800W

500W 750W 1000W 1500W 1000W 1500W 2000W 3000W 53V rms 64V rms 72V rms 85V rms 1kHz, 0.2% THD+N Power figures are watts per channel, both channels driven.

1kHz, 0.4% THD+N for 2 ohm stereo and 4 ohm bridged operation.

20Hz–20kHz, +/-1dB 20Hz–20kHz, +/-1dB <0.2% rated power @ 4 ohms, 1kHz <0.35% @ -3 dB below rated power @ 8 ohms 400:1 @ 8 ohms (20 Hz to 100 Hz)

>60dB @ 1kHz Selectable: x20, x40, or .775 V for full rated output power >20kohms balanced, >10kohms unbalanced > -100dB, A-weighted below rated power @ 4 ohms > -60dB below max rated power (1kHz) D

Linear with toroid transformer 10A / 6A 12A / 8A 15A / 10A 20A /12A

2.6A 3.6A 4.5A 7.0A

5.3A 7.5A 9.6A 14.0A

1.0A 1.1A 1.25A 1.5A 484 614 781 1024

Back to front via variable speed DC fan balanced female XLR, 1/4"TRS, unbalanced 1/4” TS on Neutrik combo connectors Five-way “touch-proof” binding posts and Neutrik Speakon™ connectors (which presents both outputs on the A Speakon™ for bi-amplified applications) front panel: twin recessed stepped attenuators, power switch rear panel: signal ground-lift, mode select, gain select, circuit breaker signal level (5 element bargraph), protect, active, ACL / IGM

16-gauge steel chassis, cast aluminum front panel - optional handles available

3.5" x 19" (front panel) 17" (chassis) x 15.3” (16.55" to rack ears) hxwxd 30 lbs 35 lbs 38 lbs 41.4 lbs

five years USA, Canada, United Kingdom, and many other countries

Crest Audio Inc.

16-00 Pollitt Dr. Fair Lawn NJ 07410 USA

TEL: 201.909.8700 FAX: 201.909.8744

www.crestaudio.com

80307074

Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications.

9.22.04 v.1.5

Architects’ & Engineers’ Specifications:

The power amplifier shall consist of 2 channels. Each channel will deliver a minimum of (280 / 400 / 560 / 800) watts at 8 ohms, (500 / 750 / 1000 / 1500) watts at 4 or 2 ohms, 1 kHz. In bridged mono mode, it will deliver a minimum of (1000 / 1500 / 2000 / 3000) watts at 8 or 4 ohms, 1 kHz. It shall weigh (30 / 35 / 38 /

41.4) lbs. The amplifier shall incorporate protection circuitry against output short circuits, DC voltage on outputs, thermal overload and load protection due to any form of amp failure. It will include impedance sensing circuitry, and RMS clip limiter and Auto-Ramp signal control. The amplifier shall have a sensitivity of .775V at the input, which will deliver full rated output

power at 4 ohms. Gain can be changed to x20 or x40. The hum and noise level shall be greater than 100dB below rated output at 4 ohms, "A" weighted. The amplifier shall have a class D output stage with a linear power supply. The frequency response shall be greater than 20 Hz - 20 kHz, +/-1 dB, at full rated output power @ 4 ohms, 1%THD. The amplifier will operate at either 120 VAC, 60Hz (safe operating range 100-132VAC) or at 230 VAC, 50Hz (safe operating range 200-253), voltage selection determined at factory. Maximum current draw at 120V shall be no greater then 15 A (CD3000), both channels driven continuously into 4 ohm load at 1/3 power. Front panel indicators shall include LED indicators for Protect, ACL / IGM (automatic clip limit), Signal

level, and Active status. Front panel attenuators will be recessed and detented. Input connectors shall be Neutrik Combo

™ connectors

featuring balanced inputs on female XLR and 1/4" TRS, and unbalanced inputs on 1/4” TS , one per channel. Output connectors shall be 5-way binding posts and Speakon, per channel. A switch shall enable the signal ground to be lifted from the chassis. The packaging of the amplifier shall allow for standard rack mounting without requiring space between similar units as long as rack is properly ventilated. Dimensions main chassis shall be 17" wide (front panel is 19" wide), 15.3" deep (16.55" including rear rack ears), 3.5" high. The amplifiers shall be designated the Crest Audio Model CD1000, CD1500, CD2000, and CD3000.

CD2000 rear panel shown