CAMBRIDGE - AZUR 651A (BLACK) Audiophile grade oversize toroidal transformer and substantial extruded heatsink allowing 2 x 75 Watts RMS into 8 ohms. USB audio input allowing USB audio streaming from computer. Separate transformer taps for left and right channels, twin rectifiers and separate PSUs for dual mono operation of the left and right power amps. ALPs film type black box volume pot for superb low level channel balance and stereo imaging. CAP5 protection technology to enhance performance at high volumes. Low dissipation polypropylene signal capacitors and custom made electrolytic capacitors in critical positions. Acoustically damped full metal chassis with thick brushed aluminium front panel. Front mounted 3.5mm iPod/MP3 player connection. Eco-friendly &lt;1W Standby power consumption.