Rockford Fosgate T800-4 silver 4-channel amplifier. Amp is in good cosmetic condition with normal wear for its age. Does NOT function currently due to a burnt resonator. Will need repair to operate properly. This is being sold AS-IS, for parts or repair. No further testing has been done beyond identifying the burnt resonator. Great candidate for someone experienced with amplifier repair or looking for a solid Rockford Fosgate project.