JL Audio JX250/1D 250W RMS at 2 Ohms(160W RMS at 4 Ohms) JX Series Class-D 1-Channel 2-Ohm Stable Amplifier 3-Way System Protection circuitry (thermal, low impedance, and speaker short protection) Heavy duty aluminum alloy heatsink for effective heat dissipation Nickel-plated RCA level inputs Nickel-plated screw terminals Dimensions: 11L x 7-3/4"W x 2-1/8"H