# Adcom GFA-555 II

**General**

- Product type: High end high power amplifier
- Number of channels: 2
- Brand: Adcom
- Audio inputs: Stereo L/R RCA
- Model: GFA-555 II
- RMS power: 400 W

**Specifications:**

- Inputs.
- 100k O.
- Two gold-plated, Teflon-insulted brass RCA jacks

- Gain

27 dB.

- Input Sensitivity

1.75V for 200 W into 8 O. 130 mV for 1 W into 8 O.

- Rated Power Output

200 watts per channel into 8 O from 20 - 20,000 Hz at less than 0.04% THD, both channels driven. 325 watts per channel into 4 O from 20 - 20,000 Hz at less than 0.04% THD, both channels driven. 600 watts into 8 O from 20 - 20,000 Hz at less than 0.04% THD, bridged mono 850 watts into 4 O from 20 - 20,000 Hz at less than 0.09% THD, bridged mono

- Dynamic Headroom

2.5 dB at 4 O.

- Power Bandwidth

1.7 - 100,000 Hz at - 3 dB.

- Frequency Response

10 - 20,000 Hz +0, -0.25 dB at 1 W RMS into 8 O.

- Damping Factor

Not less than 800 from 20 - 20,000 Hz into 8 O. Noise Not less than -110dB down from 200 watts into 8 O, A-weighted.

- Power Input

220 VAC 50-60 Hz. 72 VA idle. 1,500 VA maximum. 675 VA at 200 W into 8 O. I measure 37.5 watts at idle, cold. 60 watts at idle, warm (0.73A). 92 watts (1.09A) when delivering 1 watt per channel into 8 O. 845 watts when delivering 265 watts per channel into 8 O.

- Dimensions

185 x 432 x 310 mm Weight 16 kg

## Remarks[edit]

Other models of the same series: