|Simultaneous High Current / High Voltage Magnetic Field Power Amplifier. Our most powerful stereo amplifier designs with your choice of power output displays, that TFM - 42 and TFM - 45 can bring any speaker system under tight, authoritative control, yet with the warmth that rivals tube designs. Silver seven transfer function modified. 375 watts RMS / channel into 8 ohms, 20 - 20 KHZ with no more than 0.5% THD. 500 watts RMS / channel into 4 ohms, 20-20 KHZ with no more than 0.5% THD. 1000 watts bridged mono. TFM - 45 features analog power meters.