BOSS Audio Systems R1004 Riot Series Full-Range Class AB Amp (4 Channels, 400 Watts max)

MOSFET power supply; High- & low-level inputs; Fixed high-pass crossover; Variable low-pass crossover ; Variable bass boost; Blue backlit illuminated logo; 4 channels; 400W max; 38W RMS x 4 @ 4ohm ; 75W RMS x 4 @ 2ohm ; Dim: 2"H x 7.75"W x 9"D;