Hard to find RARE !! Old school the best !
Used all works.
Specification :
Power supply voltage--------------9-16VDC
Idling current-------------------------0.6A
Output power(RMS)----------------4 x 75W @14.4V/4Ω
Output power(RMS)----------------4 x 100W @14.4V/2Ω
Output power(RMS)----------------2 x 180W @14.4V/4Ω Bridged
Output power(MAX)----------------1800W