Xtant X1001

My friend came over with one of theese..

I removed all power supply fets since they were shorted..

I replaced all 4 of the A56's on the board also replaced the 10 ohm resistors..

Left the power supply fets out and hooked the amp up to look at the gate signal ..

With no power supply fets installed the amp burns all 4 of the A56's in it within 5 secs Any ideas?
 
Heres a pic of the square wave on the base of the 56's


Scope is set to 5us .5 volts div
 

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