The Cambridge Audio Azur 640R was a pleasure to measure, as it consistently delivered expected behavior and declined to snap fuses, smoke circuit boards, or require resetting, despite the usual abuse. Better still, it also set new receiver benchmarks on test after test: perfect (yes, perfect!) scores for PCM-stereo linearity at -90 dB and real-world (dithered) signal-to-noise ratio (plus superb 96-kHz/24-bit S/N), best-ever excess-noise figures, and stereo output power that could probably sneak by on a "150 watts x 2" model. Multichannel Dolby Digital results were just as fine, and the Azur 640R did indeed deliver its full rated power with five channels driven before clipping - and very nearly did so with seven channels stressed. It's quite nice, once in a while, to have test-bench results (acquired, as always, after listening/writing is complete) coincide so well with listening opinions, reconfirming that maybe one really can hear a difference now and then.