The MF2250 and the MF2500 offered audiophiles a choice of power level in stereo amplifiers while the MF5600 was a five-channel amplifier. The overall circuits in these amplifiers used a combination of FETs, and bi-polar transistors. FETs were chosen for the gain stage because like tubes and unlike bi-polars, they produce almost no strident odd-order harmonics. Bi-polar devices were specified for the output stages of these amplifiers for their low output impedance, resulting in improved bass response.
Specifications Power Output: MF2250 – 120 watts per channel MF2500 – 240 watts per channel MF5600 – 120 watts per channel All deliver their power from 20Hz to 20KHz at no more than 1% THD and IM, both channels driven into 8 ohms.
Response: bandpass 20Hz to more than 20kHz , +0, -.5dB Hum & Noise: 100 dB relative to max output
Mechanical: MF2250 – 19″ X 4 ¼” X 16” MF2500 – 19” X 6 ¾” X 16” MF5600 – 19” X 8” X 16”