ADCOM
ADCOM GFA-585se Power Amplifier
ADCOM GFA-585se Power Amplifier
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Adcom GFA-585se Power Amplifier
The Adcom GFA-585se is a high-power stereo amplifier built for serious two-channel and home audio systems. It uses a pure Class A/B design and delivers 450 watts per channel into 8 ohms, 600 watts per channel into 4 ohms, and 1000 watts bridged into 8 ohms. Adcom positions it as an upgraded version of an already well-regarded amplifier platform, with careful attention paid to component selection throughout the design.
Why We Like It
For systems that demand grip, current delivery, and headroom, the GFA-585se stands out as a serious power amplifier. Its combination of high output, wide bandwidth, and very high damping factor makes it a strong match for demanding loudspeakers and listeners who want authority without giving up control.
Key Highlights
- Pure Class A/B stereo power amplifier
- 450 watts per channel into 8 ohms
- 600 watts per channel into 4 ohms
- 1000 watts into 8 ohms in bridged mode
- Frequency response of +0, -0.25 dB from 10Hz to 20kHz at 1 watt into 8 ohms
- Power bandwidth of 20Hz to 20kHz
- High damping factor of >800 from 20Hz to 20kHz
- 120VAC and 230VAC / 50-60Hz operation listed by manufacturer
System Matching
The GFA-585se is a natural fit for audiophiles building a high-current stereo rig, upgrading from an AV receiver, or pairing a dedicated preamp with a more capable amplifier stage. Its power reserves and bridged capability also make it attractive for systems using more demanding speakers.
Technical Specifications
| Specification | Details |
|---|---|
| Amplifier Type | Class A/B Power Amplifier |
| Output Power (8 ohms) | 450 watts per channel |
| Output Power (4 ohms) | 600 watts per channel |
| Bridged Output | 1000 watts into 8 ohms |
| Frequency Response | +0, -0.25dB, 10Hz to 20kHz @ 1 watt, 8 ohms |
| Power Bandwidth | 20Hz to 20kHz |
| Input Impedance | 22,000 ohms |
| Input Sensitivity | 2.681V rms for 450 watts into 8 ohms; 126mV rms for 1 watt into 8 ohms |
| Damping Factor | >800, 20Hz to 20kHz |
| Dimensions | 10-3/4" x 19" x 19-3/4" (275mm x 482mm x 502mm) |
| Weight | 70.4 lbs (32kg) |
| Shipping Weight | 79.2 lbs (36kg) |
| Power Requirement | 120VAC & 230VAC / 50-60Hz |
Recommended Reading & Related Shopping
Learn more about amplifier matching in our power amplifier buying guide. Browse more options in our power amplifiers collection, explore the Adcom collection, or compare with other two-channel amplification components.
Frequently Asked Questions
What type of amplifier is the Adcom GFA-585se?
It is a pure Class A/B stereo power amplifier.
How much power does the GFA-585se deliver?
It is rated at 450 watts per channel into 8 ohms, 600 watts per channel into 4 ohms, and 1000 watts into 8 ohms when bridged.
Is the GFA-585se suitable for demanding speakers?
Its high power output and damping factor suggest it is well suited for speakers that benefit from strong current delivery and amplifier control.
What are the physical dimensions and weight?
The amplifier measures 10-3/4" x 19" x 19-3/4" and weighs 70.4 lbs.
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