Refurbished; 500W RMS x 1 @ 4ohm ; 1ohm stable; Rugged MOSFET pulse-width modulation power supply for Instant Maxx power output; Silver preamp-level RCA inputs; Oversized speaker terminals; SPEED-FETS high-speed MOSFET output devices; Amp protection with system-diagnostics LEDs protects against current/amp overload, short circuits, thermal overload & DC offset; Includes remote bass control; Dim: 3.25"H x 10.25"W x 22"D;