The measured power of the tip: 2x350W with 8 ohms resistance
Transformers: 1.5kW with 2x60VAC
Main filtration: 12x6800uF on 100V
Tips: 5 pairs of irfp240/9240
Cooling: tunneling on each channel
Wires to fund the tips: 6mm shielded.
The device has active lowpass filters built on TL072 on each channel and subsonic 37Hz-3dB, also built on TL072.
Protection:
short-circuit protection
overload protection
DC on output protection realized on 2 transistors and optotriacs
silent start made on time relays
soft start
thermal protection with smooth rpm adjustment build on two sensors, one bimetallic isolating the outputs above 95 degrees, and one thermistor to adjust rpm's
The housing was made from 2mm cut and a bend plate.
The amplifier weights 25kg.