What impedance speaker load do you intend to use ? If 4 Ohms, you will need a rail to rail Voltage of about 100V. For 8 Ohms, about 140V.
The good news is that the capacitors used as local bypass of the rails on the board are marked as 220uF @ 100V so you are good there. But, only 4 output devices is on the light weight side for a musical instrument amplifier of 200 Watts. Better to have six or eight. Also, those standup 0.22 Ohm emitter resistors might be hard to find.
The good news is that the capacitors used as local bypass of the rails on the board are marked as 220uF @ 100V so you are good there. But, only 4 output devices is on the light weight side for a musical instrument amplifier of 200 Watts. Better to have six or eight. Also, those standup 0.22 Ohm emitter resistors might be hard to find.