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That's typical for what I see too Ray, now try 1khz and go for a clip....
That's typical for what I see too Ray, now try 1khz and go for a clip....
What is your rail voltage when she clips??
42 volts squared , divided by 8 is 220 watts, and you are not out of rail voltage yet.... desolder one end of D9, just one end and lift it away from the board. Doing that isolates the SOA protection circuit. It looks like the protection circuit may be triggering too soon. Then run the 1khz test again, but don't go over 46 volts out, see if it clips before 46....
Ok, you need to replace R25, R26 in each channel with a 13K resistor. You have 56K in there now.