Power Amplifiers Series - Discontinued Power Amplifiers


600 Watts / 70 Volts Amplifier



The CR670 is the first CR series amplifier built specifically for 70-volt commercial installations. This amplifier delivers 600 watts of mono power at 70 volts in a quiet, passively-cooled, rugged three rack-space package. Professional quality at a very affordable price.

Binding strip connectors, versatile inputs including optional specialized microphone / line input control modules with trim and EQ controls make the CR670 the ONLY unit required to operate a 70-volt background music / paging system.

Physically, the amplifier consists of a heavy-gauge (yet lightweight) aluminum chassis finished in a durable baked-on black finish. All electronic components are mounted on high-grade glass-epoxy circuit boards and include low-noise metal film resistors.



Amplifier class A / B
Continuous Average Power Bridged BCD (Watts) 600 @ 70 Volts
Burst Average Power Bridged BCD (Watts) 850 @ 70 Volts
Frequency Response (Hz, +/- 1dB) 50 - 20k
Hum and Noise (un / Aweighted -dB) -100
THD -1kHz- 4 OHMS 0.0001
THD - 20Hz-20kHz, 4 Ohms 0.0015
Slew Rate Bridged (V/uS) 40
Damping Factor (30 Hz - 400 Hz @ 8 Ohms) 450
Crosstalk (1kHz / 20Hz-20kHz) -75 / -60 db
Input Impedance - Bal/Unbal (Ohms) 20k / 10k
Input Sensitivity (Vrms) For Full Power Out 1.4 V
Max Voltage Gain (dB) 34
CMRR @ 60Hz (min/typ) 48 / 56 db
Protection DC, Load, Thermal
Limiter Peak
Cooling Internal Fan
Cooling Path Front To Rear
Inputs - Other XLR / 1/4 inchTRS Combi (x2), Barrier Strip
Outputs - Binding Post 1
Outputs - Other Barrier Strip
Power Consumption (typ/max) 540 / 720 Watts
Rack Spaces 3
Transformer Type Torroidal
Exterior Finish Baked, Black Painted
Other Features ** Built specifically for 70 volt commercial installations
Dimensions (DWH /D fm ears, inches) 19 x 13 x 5.25
Dimensions (DWH /D fm ears, cm) 48 x 33 x 13
Weight (lbs / kg) 30 / 13.6

Specifications subject to change without notice