Magnetic Field Power Amplifier
In good condition - Sorry no original box, packing, or manual is available.
Simultaneous High Current / High Voltage Magnetic Field Power Amplifier. One of their most powerful stereo amplifier designs, that can bring any speaker system under tight, authoritative control, yet with the warmth that rivals tube designs.
All Electrolytics have been replaced throughout the unit. The high rail power supply retrofit board was also installed with X 6 3300uf 160 volt nichicon capacitors. Low rail power supply bleed down resistors where replaced 680ohm 2w X4. Both channels recieved same part number newer production bur brown op amps for lower noise floor and improved imaging. Both channels have the damping potentiometer removed and hand matched 1% fixed value resistors in place matching the gain within .05 % of left and right channels for improved linearity. Both channel current limiting resistors where also replaced. The meters have been recalibrated corresponding 375 watts into 8 ohms. Both channels biased per service manual and unit burned in for three hours at 50 watts. Unit pushed out 390 watts per channel before clipping.
8-ohm FTC rated power/ch: 375 W
4-ohm FTC rated power/ch:500 W
2-ohm dynamic power/ch:560 W
Bridged mono power:1000 W
4/8-ohm FTC rated THD:0.5 %
Rated full power bandwidth:20-20kHz