Award-Winning Azur 851A Champions Power, Versatility, Ultra-Low Distortion, Super-Fine Detail, Audiophile Components: Class XD Technology the Best of Both Class A & B Operation Power, finesse, flexibility, astonishingly low distortion: Cambridge Audio's Azur 851A exemplifies what you audiophiles want (and need) in an integrated amplifier . Bolstered by proprietary Class XD technology to produce even greater musical detail, and capable of delivering 120 watts of high-quality power into 8 ohms (200W into 4 ohms), it benefits from two oversize audiophile-grade toroidal transformers—one for the sensitive preamp section and one for the power stages. This incredible speaker-taming amount of power can be precision-controlled with an innovative, fully balanced silicon gate volume control controllable in 1dB steps, which yields very fine adjustment across the volume range and highly accurate channel balance. The ability to set any input to fixed gain even turns  Azur 851A into a power amplifier in a multichannel system. "Frankly, the feature set of the 851C and 851A is the stuff of high-end audio dreams, but packaged in sensibly-priced components... As is so often the case with products from Cambridge Audio, what you're getting is cutting-edge technology for substantially less than high-end prices." – Hi-Fi News , Outstanding Product review Because everyone's needs are different, Azur 851A offers two main types of connectivity: the more commonly found RCA/Phono inputs, plus two pairs of fully balanced XLR connections. Speaking of versatility, you can even control your iPhone, iPad, or iPod using the 851 Series remote control when they're docked in Cambridge Audio's matching iD100 digital dock. And that's just the beginning of this award-winning component's options. A second XLR input, customizable display, separate transformer taps for the left an