Class D amplifier CDA7.5

Ideal for cinema audio applications, the line of Christie^® CDA professional amplifiers offer a range of power options to meet a variety of uses. Utilizing an advanced high-speed Class D architecture and high current switch mode power supply, these amplifiers offer high power output and efficiency with very low heat output, fast transient response and stability. The Christie CDA amplifiers are perfectly matched to complement the rest of the Christie Vive Audio solution, providing dynamic and detailed cinema sound.

Features:

Class D architecture
Switch mode power supply
Neutrik XLR / TRS ¼" inputs, balanced +4dB professional level
Neutrik Speakon high current locking output connectors
Active, Signal Present, DC Protection and Thermal LED indicators
Stepped input level controls

Low energy

Reduced operating expenses

2-channel

Class D

Powerfully efficient with faster transient response and lower power

Low heat

Specifications

Rated power

2 x 2 ohms:
3790W per channel @ 1kHz 1% T.H.D. both channels driven
2 x 4 ohms:
2030W per channel @ 1kHz at <0.1% T.H.D. both channels driven
2 x 8 ohms:
1170W per channel @ 1kHz at <0.1% T.H.D. both channels driven
1 x 2 ohms:
3900W @ 1kHz at <0.1% T.H.D.
1 x 4 ohms:
2400W @ 1kHz at <0.1% T.H.D.
1 x 8 ohms:
1300W @ 1kHz at <0.1% T.H.D.

Minimum load impedance

2 ohms

Maximum RMS voltage swing

124V

Frequency response

20Hz-30kHz; 0dB, -3dB @ 1W

T.H.D.

2 x 2 ohms:
<0.5% @ 3390W per channel from 20Hz-4kHz, decreasing to 3100W @ 20kHz
2 x 4 ohms:
<0.1% @ 1850W per channel from 20Hz-20kHz
2 x 8 ohms:
<0.1% @ 1170W per channel from 20Hz-10kHz, increasing to 1350W @ 20kHz

Input CMRR

>-75dB @ 1kHz

Voltage gain

x40 (+32dB)

Crossover

100Hz switchable 2nd order high pass and 3rd order low pass per channel

Crosstalk

>-60dB @ 1kHz at 1000Ws power @ 8 ohms

Hum and noise

>-100dB, "A" weighted referenced to rated power @ 4 ohms

Slew rate

>12V/μs

Damping factor (8 ohms)

>200:1 @ 20Hz-1kHz @ 8 ohms

Phase response

+15 to -85º from 20Hz-20kHz

Input sensitivity

2.25V ±3% for 1kHz 4 ohm rated power • 2.20V ±3% for 1kHz 2 ohm rated power

Input impedance

20k ohms balanced • 10k ohms unbalanced

Current draw

@ 1/8 power:
1348W @ 2 ohms • 757W @ 4 ohms • 504W @ 8 ohms
@ 1/3 power:
3185W @ 2 ohms • 1654W @ 4 ohms • 907W @ 8 ohms

Cooling

3 temperature dependent variable speed fans

Controls

2 front panel attenuators • Crossover select switch for High Out, Normal and Subwoofer

Indicator LEDs

2 ACL (clip limiting) • 2 signal presence • 2 active status • 2 temp • 2 DC protect

Protection

Thermal • DC • Subsonic • Incorrect loads • Under and over voltage

Connectors

Inputs:
Neutrik Dual Combi 1/4" XLR
Outputs:
Dual 1/4" signal patch • Neutrik Speakon Dual 4-pin twist-lock connectors

Construction

0.062" thick aluminum

Dimensions

(LxWxH) 17.5 x 19 x 3.5" (444 x 482 x 89mm) behind front panel + 0.75" for front panel

Net weight

15.2lbs (6.9kg)*

Gross weight

19.0lbs (8.6kg)

Warranty

Limited 3-year warranty

Rated power readings made with BW: <10Hz-22kHz. All power measurements made at 120 VAC. 2 ohm power is time limited by circuit breaker. Input power requirements: 120 VAC, 60Hz, 5A.

* Net weight does not include power cord.

Downloads

Class D amplifiers

Nominal Amplifier Gain Control Settings

May 30, 2016 | PDF: 130 KB

Provides procedures for setting amplifier gain controls to nominal levels. Contact Christie technical support or your Christie Sales Manager if you require more information.

Christie Vive Audio CDA5/CDA7.5 Amplifiers User Manual

Apr 08, 2014 | PDF: 2.7 MB

Provides installation, operation, maintenance, and trouble-shooting information for the Christie Vive Audio CDA5/CDA7.5 Amplifiers. Contact Christie technical support or your Christie Sales Manager if you require more information.