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Bridgeable High Current Stereo Power Amp
2 Year Warranty
30 Day Returns
where to purchase
For those who desire the power finesse in a two-channel amplifier, look no further than GFA-555ms. The GFA-555ms 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. GFA-555ms is rated at 200 W into 4 ohms, takes both Unbalanced and Balanced inputs and provides high performance, ultra low distortion output power all from a neat package. We have engineered an uncompromised circuit design that delivers ultra-low distortion and a crisp dynamic sound. It all adds up to a startlingly vivid and highly impactful musical performance that will put more energy into your loudspeakers as well as control them like never before. Great care was taken to insure that distortion in the amplifier would remain extremely low, particularly when driving these highly reactive loads in which the phase angles of the voltage and the current are substantially different.


  • 125 Watts / Channel 8 ohms
  • 200 Watts / Channel 4 ohms
  • 400 Watts 8 ohms BRIDGED
  • Input Impedance: 100,000 ohms.
  • Frequency Resp: @ 1watt, 8-ohms: +0. -0.25dB, 10Hz to 20kHz
  • Power Bandwidth (-3dB): 10Hz to 100kHz
  • Power: 120VAC & 230VAC / 50-60Hz
  • Damping Factor: >400, 20Hz to 20kHz
  • Input Sensitivity: 1.38V rms, 125W into 8 ohms; 123mV rms, 1W into 8 ohms.
  • Max Dimensions: 6” x 17” x 12.5” - 152mm x 432mm x 318mm
  • Weight: 28.6lbs.(13kg)
  • Shipping Weight: 33lbs.(15kg)
  • Warranty: 2yr. limited manufacturer


"Great Amp. Great Power! Power is well above average, bass mid & treble almost exact."

Kenneth J. CA

"Theater-Quality Sound with plenty of headroom. Fantastic amp, robust and powerful."

Gregory B. MA

"I've bought two pairs of these speakers and now I can't live without them."

Shawn K. MI

"I can hear no difference in sound quality between AMP2400 and the amps which cost twice as much."

Ronald M. PA
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