50w x 4 RMS High Current Amplifier, Bridgeable, 2000w Max, 18db bass boost @ 45 Hz., Continuously variable 18db X-over with phase shift/time alignment control, Balanced line inputs, Surface mount technology (SMT), Mil-spec. Double-Sided Gold Plated Circuit Board, Regulated dual power supplies using PWM switching. MOSFET transistors used in both input and output stages. On board computerized protection monitor. Stable @ 1 Ohm Stereo, 2 Ohm Mono. Dimensions 9.75″ x 2.5″ x 16.5″.