7s (which Herb had never heard sound "more precise, powerful, or three-dimensional" than with the post-break-in REF600Ms). JA's measurements uncovered a remarkably high (109.9dB) unweighted signal/noise ratio, power outputs higher than the manufacturer's specs, and "impressively low levels of distortion and noise." In a Follow-Up in September 2017, HR reported on his experience with the Bel Canto monoblocks, ostensibly borrowed to drive his current-hungry Magnepan. Of his experience with the REF600Ms driving his Bowers & Wilkins 802 D3 loudspeakers, KR observed that they "never ran out of steam with any sort of music at any listening level, and remained absolutely consistent in tonal balance and clarity." Kal also described the amp's price as "eye-openingly" low. All amplifiers are stereo models, except where designated.īel Canto Design e.One REF600M monoblock: $4990/pair $$$īel Canto's REF600 monoblock is similar in size to their REF1000M, which KR reviewed in the March 2009 issue, but the newer amp trades the older's ICEpower-based class-D output section for the newly ubiquitous Hypex NCore class-D module, which develops 300W into 8 ohms or 600W into 4 ohms-specs identical to those of the MPS1 power-amp section of the Bel Canto Black (described elsewhere in this edition of "Recommended Components"). Except where stated, output powers are not the specified powers but rather those we measured into an 8 ohm resistive load. Careful auditioning with your own loudspeakers is therefore essential. Nevertheless, even within each subclass, Class A amplifiers differ sufficiently in character that each will shine in an appropriate system. Editor's Note: Because of the disparity between typical tube and solid-state "sounds," we have split Class A for separate power amplifiers into two subclasses.
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