CKd™ 604

Intelligent Networkable Hi-Power Amplifier



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The CKd™ 1208 and CKd 1204 provide 1250 Watts per channel in eight and four channels, respectively, while the CKd 608 and CKd 604 provide 625 Watts per channel in eight and four channels. Each amplifier channel will operate to rated power in direct 70V, 100V, 4 or 8 Ohm modes, configurable per channel.

CKd amplifiers are networkable through the Crest Audio NexSys Nx Dante-8 or Nx CobraNet 8 interface modules which is configured and managed using the MediaMatrix NWare software program for advanced control and audio routing. The Nx Dante-8 or CobraNet 8 module fits into the rear bay of CKd Series power amps and supports networked digital audio I/O via a Gigabit Ethernet connection.

A Control Voltage input is included on each channel to allow external gain control, while the Fault output on each channel allows the CKd power amps to be wired to other monitoring systems. In addition, users can conserve energy by disabling channels that are not in use.

The CKd Series includes Crest Audio’s exclusive ACL™ (Active Clip Limiting), which automatically reduces gain at the onset of clipping to prevent amplifier and loudspeaker damage, and IGM™ (Instantaneous Gain Modulation), which monitors load current to protect against overloading.

Additional information

Channels (Input)


Channels (Output)


Networked Audio

Optional (CobraNet or Dante)

Network Control


Power per Channel @ 4 Ω

650 W

Power per Channel @ 8 Ω

650 W

Power per Channel @ 70V

625 W

Power per Channel @ 100V

625 W


Class D

Minimum Load Impedance

4 Ω

Frequency Response

+0.8/-0.5 dB, 10 Hz – 22 kHz

Input Connectors

4 x 3-pin Euro Connector

Output Connectors

4 x 2-pin Barrier Strips

Expansion-/Extension Card Slot



Rack Mount (19")

Yes (2U)

Net Weight

22.0 lbs (9.98 kg)

Product Height

3.48" (88 mm)

Product Width

19.00" (483 mm)

Product Depth

20.30" (516 mm)

AC Power Input

120VAC 60 Hz, 230VAC 50 Hz version available



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