New Old Stock ORION XTR500.4 and ORION XTR400.4 Circuit Boards.
Resistors are already in place. Customize the way you like it, or hang it on the wall :)
Rebuild your blown made in USA amplifier! These came from the ORION Tempe AZ Factory, and I have kept them in Temperature Controlled Storage for 20 years! Once theyre gone, they're gone. 7 available at time of posting.