Niles SI-2100 Audio System Accessory Box Digital, high current bridgeable stereo amplifier 100 watts RMS per channel into 8 Ohms (all channels driven) Auto switching 110V-230V power supply Three turn-on modes: music sense, voltage trigger, and manual Audio circuitry constructed with the finest parts available, including 1% metal film resistors, high quality capacitors and oversized heat sinks for clear and uncolored sound