 The GFA-555ms is a very powerful amplifier capable of delivering very large peaks into low impedance. To achieve this, eight sets of specially selected TO-3-type, metal-cased bipolar output transistors are used in the GFA-555ms in a triple-Darlington configuration of its driver and output stages. The safe operating area of these transistors, along with their circuit topology, insures very efficient power delivery to reactive loads, regardless of the phase angle of voltage and current. In addition, no protection or current-limiting circuitry is used in the GFA-555ms which could degrade the signal. Features125 Watts / Channel 8 ohms200 Watts / Channel 4 ohms 400 Watts 8 ohms BRIDGED Two year limited manufacturer warranty SpecificationsPower Rating (To FTC Requirements) 125 watts continuous average power into 8 ohms at any frequency between 20Hz and 20kHz with both channels driven at less than 0.04% THD.200 watts continuous average power into 4 ohms at any frequency between 20Hz and 20kHz with both channels driven at less than 0.05% THD.. 400 watts continuous average power into 8 ohms at any frequency between 20Hz and 20kHz at less than 0.09% THD, bridged.. IM Distortion (SMPTE) 1 watt to 125 watts into 8 ohms .0.009% 1 watt to 200 watts into 4 ohms .0.009% IM Distortion (CCIF, Any Combination from 4kHz to 20kHz) 125 watts into 8 ohms .0.002%, 200 watts into 4 ohms .0.003% THD + Noise at 125 Watts into 8 Ohms 20Hz 0.004%, 1kHz 0.003%, 10kHz 0.006%, 20kHz 0.020% THD + Noise at 200 Watts into 4 Ohms 20Hz 0.005%, 1kHz 0.004%, 10kHz 0.020%, 20kHz 0.030% IM Distortion, Bridged (SMPTE) 1 watt to 400 watts into 8 ohms .0.05% IM Distortion, Bridged (CCIF, Any Combination from 4kHz to 20kHz) 400 watts into 8 ohms .0.005% THD + Noise at 400 Watts into 8 Ohms, Bridged 20Hz 0.004%, 1kHz 0.004%, 10kHz 0.020%, 20kHz 0.050% Frequency Response @ 1 Watt into 8 Ohms 10Hz to 20kHz +0. -0.25dB Power Bandwidth (-3dB) 10 Hz to 100kHz Dynamic Headroom into 4 Ohms 1.3dB Signal-to-Noise Ratio, "A" Weighted 125 watts into 8 ohms .102dB Gain 27.2dB Input Impedance 100,000 ohms Input Sensitivity 125 watts into 8 ohms 1.38V rms, 1 watt into 8 ohms 123mV rms Damping Factor 20Hz to 20kHz >400 Rise Time 5kHz,90V peak-to-peak square wave, 20% to 80% 2.3us Semiconductor Complement 34 transistors, 2 zener diodes, 13 diodes, 2 ICs, 2 diode bridges Power Consumption (Continuous, Both Channels Driven) Quiescent 48VA, Maximum 900VA 125 watts into 8 ohms 420VA, 200 watts into 4 ohms 730VA, 400 watts into 8 ohms, bridged 800VA Power 120VAC/60Hz Chassis Dimensions 5-1/4" (134mm) x 16-15/16" (430mm) x 12-1/8" (308mm) Maximum Dimensions 6” (152mm) x 17" (432mm) x 12-1/2" (318mm) Weight 28.6lbs.(13kgs) Weight, Packed 33 Ibs.(15kgs) |
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| Adcom GFA-555se Stereo Amplifier | Adcom GFA-6002 Stereo Amplifier | Adcom GFA-7605 5-Channel Amplifier |
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$1299.00
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$699.00
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$1199.00
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