just finished torture test of amp on "regular" pcb'cause I still don't have these MOX 1R/3W , mounted plain carbons - 2WPSU - biggie Donut via Variac ,Graetz , 2x33mF SpraguesR9 in ( factory preset) mid position , R12 and R25 on min/short positionvoltmeter on output for offset ; goal is zerovoltmeter across any 1R source(drain) resistor ; goal is 1V for 2A Iqboth inputs groundedfired up , due to cascodes in front LTP everything came to life at approx +/-15VdcIq around 1A5 , offset around 350mVup with PSU at approx +/-18Vdc check and set voltage across R3 to 9V4 ( that's 20mA through LTP)fiddle with R12 - offset to zeroVariac - full PSU voltage +/-22V5 again R12 - offset zero R25 - fiddle .. go to 1V across 1R done;torture test - everything with and without dummy load ;5 mins in full clip ( almost rectangle ) at 500 , 1K , 5KHz ; with or without dummy loadbrown out 30 secondsbrown in 30 secondsasymmetrical PSU voltage ( +18V5 / -22V5) ; little hum in speaker but offset stable sound - mono on test speaker - naked Philips 12" FR ------ gorgeous !