Soundstream STL1.600D Mono Class D Amplifier (Black) RMS Power Rating: 4 ohms: 400 watts x 1 chan., 2 ohms: 600 watts x 1 chan. Full MOSFET Power Supply Remote bass level control included 3-Way System Protection circuitry (thermal, overload, high/low voltage) Black anodized finish w/ chrome accents The warranty is for 90 days or 2 years if professionally installed