ADCOM GFA-585se Power Amplifier

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ADCOM GFA-585se Power Amplifier


Enormous power at an affordable price is what this amp is all about. A pure class A/B power unit, driven in parallel to deliver 450 watts/channel into 8 ohms with impeccable quality. While developing the new GFA-585se, every single part was put under the microscope to create a better & upgraded version of what is already considered a great component in audio industry.



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.

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Output Power

450 watts into 8 ohms
600 watts into 4 ohms
1000 watts into 8 ohms, bridged

Frequency Resp.

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

Power Bandwidth (0.25dB):

20Hz to 20kHz


Input Impedance

22,000 ohms.

Input Sensitivity

2.681V rms, 450 watts into 8 ohms.
126 mV rms, 1 watts into 8 ohms.

Damping Factor

>800, 20Hz to 20kHz


Max Dimensions

10-3/4” x 19” x 19-3/4”
275mm x 482mm x 502mm


Shipping Weight: 79.2lbs.(36kg)


120VAC & 230VAC / 50-60Hz

Additional information

Weight79.2 lbs

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