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Powerflex- 670  70 Volt Six Channel Amplifier

The power amplifier shall be a multichannel unit consisting of six 
independent channels. Each amplifier shall be able to deliver 200 
watts at 70 volts, or or when pairs of channels are bridged, 400 
watts at 140 volts. Each individual channel shall be able to drive 
70 volt distributed audio lines without the use of an external 
transformer. When channels are paired, the paired channels shall 
be able to drive 140V distributed audio lines without the use of 
external transformers.

The amplifier shall have a gain of 34.0dB (50x) and an input 
sensitivity of 1.40 Volts RMS for full rated output. Frequency 
response shall be 20Hz to 20kHz +/- 0.5dB. Hum and noise 
shall be at least 100dB below full output (A-weighted) and 
SMPTE intermodulation distortion shall be less than 0.2%. Total 
Harmonic Distortion (20Hz - 20KHz) shall be less than 0.5%.
 
Each amplifier channel shall be supplied with an input attenua-
tor located on the rear panel input module. Each pair of inputs 
shall have a bypassable high pass filter of 12dB/octave at 80Hz, 
a switch to select independent or parallel channel mode and a 
switch to select normal 70V or bridge 140V mode. There shall 
be an input ground switch located on the input module to select 

chassis or floating ground operation.

The inputs shall be active balanced design, with an impedance of 
10K ohm accessible with euroblock connectors. The outputs shall 
be terminated with a screw terminal connector.

Individual channel indicators for protect, thermal overload, clip 
and signal present shall be LEDs located on the front panel. 

Cooling shall be supplied by a temperature sensitive two-speed 
fan drawing air from the front of the unit and exiting through the 
rear.

The unit shall be powered from 110 - 125V AC, 220 - 250V 
AC, 50/60Hz. Dimensions of the unit shall be 19”L  X 5.25”H X 
16.5”D. The chassis shall be constructed from 16 gauge steel 
with an aluminum face panel and weigh 47lbs. 

The unit shall be the Powerflex-670, 70 Volt four channel  power 
amplifier manufactured by Ashly Audio, Inc.

• Six Channel Amplifier - 200W/Ch 

70V, 400W/Ch 140V

• High-Speed Switched MOSFET 

Output Design with Spread Spectrum 
Switching Technology 

• Superior Efficiency Over 

Conventional Linear Amplifiers

• Input Module with Level Controls 

Located on Rear Panel

• Switchable HPF on Inputs
• Euroblock Input Connections
• Screw Terminal Output Connections
• Individual Channel Front Panel Level 

and Protection Indicators

• Multiple Protection Circuits
• Bridgeable Channel Pairs
• Internal Modular Design
• Quiet, Two-Speed Fan
• Front In/Rear Out Channeled Air-

Flow

• Five Year Warranty

Technical Notes & Specifications

Powerflex™ 670  70 Volt - Six Channel Power Amplifier

Architects Speci

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