First Watt F6 Class A amp Clone

First Watt F6 clone - built to exact production specifications
Outstanding sounding Class A solid state amplifier http://www.firstwatt.com/f6.html

The F6 is a very simple Class A push-pull design which uses N channel power Fets driven by a high quality line level transformer which splits and isolates the drive signal to the output stage while also serving as the feedback element for the amplifier.

Distortion @ 1 watt 0.05% Input Impedance 100 Kohm
Gain 14 dB (5x) Input Sensitivity (1 watt) 0.57 V
Input Sensitivity (max output) 2.83 V
Damping Factor 16 Output power 8 ohms 25 watts @ 1% THD, 1KHz
Output power 4 ohms 50 watts @ 1% THD, 1KHz
Frequency response - 3 dB @ 1 Hz, 50 KHz
Noise 200 uV unweighted, 20-20 KHz
Power consumption 180 watts