Hi-Fi News Staff

In some ways the AX-5 represents a distillation of Ayre’s ‘purist’ philosophies, as it employs both the company’s ‘Diamond output circuit’ and the elaborately-designed volume control trickled down from its flagship KX-R Twenty preamplifier. In the fully-balanced zero loop feedback AX-5 integrated, Ayre eliminated the preamp stage altogether and simply made the gain of the power amplifier directly adjustable using VGT (Variable Gain Transimpedance). The volume knob on the right of the fascia acts as an encoder to control a pair of motor-driven Shallco silver-contact rotary switches (one for each channel, conjoined using toothed belts), each of which contains dozens of hand-selected, low-noise resistors. Volume level can be adjusted over a range of 69dB in 46 steps of 1.

Producing a solid-state version of a valve CD player is nothing new for the Minnesota-based company, although, for many, ‘Audio Research’ means valves. But at least the CD6 can be sited in a cabinet or other enclosure with doors, whereas the REF9 CD player/DAC [HFN May ’13] needs ventilation. Both players confront the current need for a plethora of digital inputs and sampling rates with a full complement. The CD6’s four digital inputs comprise asynchronous USB 2.

We were bowled over by the technical performance and subjective sound quality of Simaudio’s Moon 380D standalone DAC [HFN Aug ’13]. The Moon Nēo 260D CD transport with optional DAC is a new addition to this Canadian audio company’s portfolio, so we were keen to get our hands on it for a review. Simaudio’s new Moon Nēo designs are built into casework with sculpted front panels akin to the aesthetics of the firm’s luxurious Evolution Series components. Here we’re assessing it as a CD player which, like the majority of players today, features digital inputs for playing additional sources via its digital-to-analogue converter stages.

Canadian audio manufacturer Bryston adopted a purist approach with its first computer audio product, the BDP-1 ‘digital player’ [HFN Apr ’11], this based on an ultra-minimalist computer with four USB sockets for memory sticks or external HDDs. An enhanced model, the BDP-2 featured here has joined Bryston’s line-up along with a new BDA-2 DAC which includes a 192kHz/24-bit capable asynchronous USB input. This uses proprietary firmware running on the XMOS USB audio micro-controller platform. Bryston supplies the necessary driver software on a memory stick for Windows PC users (Macintosh supports USB Audio Class 2.