BOSS Audio KIT10 4 Gauge Amplifier Installation Wiring Kit Max power: 250 watts x 4 channel at 2 ohms, RMS power: 100 watts x 4 channels. Four channel MOSFET bridgeable power amplifier with remote subwoofer level control. Trimode operation. Line and speaker level inputs. Gain control. 11-3/16"W x 2-11/16"H x 15-7/16".