ADCOM GFA-5705 5 Channel Stereo Power Amplifier

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ADCOM GFA-5705 5 Channel Stereo Power Amplifier


The GFA-5705 amplifier can drive a very broad range of loudspeakers, including those with very low impedances, at sustained high-power levels, even when the impedances are highly reactive. Great care was taken to insure that the distortion in the amplifier would remain extremely low.


The power supply in the GFA-5705 has enormous reserve with an extremely large transformer feeding a storage bank of 30000uF per channel & total of 150,000uF of filter capacitance. The transformer itself was designed for extremely good regulation, insuring stable voltages regardless of the power demands from the amplifier. Its higher efficiency was insured by using a toroidal design.

Great care has been taken by ADCOM to assure that your amplifier is as flawless in appearance as it is electronically. The front panel is a heavy- gauge, high-grade aluminum extrusion carefully finished and anodized for durability. The chassis, top cover and rear panel are of heavy-gauge steel, both painted and baked. If the front panel, top or sides should become dusty or fingerprinted, they can be cleaned with a Swifter and/or a clean, soft, Lintless, microfiber cloth, slightly dampened with a very mild detergent solution or nonammonia glass cleaner.



Output Power

200 watts @ 5 channels into 8 ohms
300 watts @ 5 channels into 4 ohms

Frequency Resp.

@ 1watt, 8-ohms:
+0. -0.25dB, 10Hz to 20kHz.

Power Bandwidth (-3dB):

5Hz to 100kHz


Input Impedance

22,000 ohms.

Input Sensitivity

1.8V rms, 200 watts into 8 ohms

Damping Factor

>300, 20Hz to 20kHz


Max Dimensions

10.75” x 19” x 19.75”
275mm x 480mm x 565mm


81 lbs.(37kg).
Shipping Weight: 90 lbs.(41kg).


120VAC & 230VAC / 50-60Hz

Additional information

Weight90 lbs

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