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Powerflex™ 470 70 Volt - Four Channel Power Amplifier

Architects Speciﬁ cations

Powerflex-470 70 Volt Four Channel Amplifier

The power amplifier shall be a multichannel unit consisting of

four independent channels. Each amplifier shall be able to deliver

250 watts at 70 volts, , 500 watts at 140 volts, all channels

driven. Each individual channel shall be able to drive 70 volt dis-

tributed 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 34.0 dB (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 45lbs.

The unit shall be the Powerflex-470, 70 Volt four channel power

amplifier manufactured by Ashly Audio, Inc.

Technical Notes & Specifications

• Four Channel Amplifier - 250W/Ch

70V, 500W/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