JENSEN POWERPLUS900 900 WATT MONOBLACK 1-CHANNEL CAR AMPLIFIER MONO AMP NOMINAL OUTPUT POWER: 275W RMS @ 4?, 450W @ 2?;POWER & SPEAKER CONNECTORS; PROTECTION CIRCUIT THAT SAFEGUARDS AGAINST SHORT CIRCUITS, DC-OFFSET & THERMAL OVERLOAD ;GREEN OPERATION & RED PROTECTION LEDS;BLUE ILLUMINATED VU LEVEL METER & LOGOS