Review: Andrew Everard

Italian manufacturer Audio Analogue's 'PureAA' line was spun out of the 20th anniversary models the company launched back in 2016. The range now runs to three models, of which the AAdac is the latest arrival, bringing digital capability to a range that was otherwise purely 'analogue'. Like the other PureAA models and Anniversary amplifiers, the AAdac is a co-operation between Audio Analogue and stablemate AirTech, and is very much Realizzato è Costruito in Italia. There's certainly none of that offshoring the entry-level line here.

You'll have to examine the £5399 Michi M8 monoblock power amp very closely to see how it differs from the company's S5 stereo model, reviewed previously alongside the £3299 P5 preamplifier [HFN May '20]. The two are the same price and size, look identical and have much the same 'ask a friend to help' mass. In fact, the M8 weighs marginally less than the S5, at 59.1kg – the difference presumably accounted for by the need for two-channel inputs on the stereo amp whereas the mono version has only single-channel connections, on both balanced XLR and unbalanced RCA sockets.

Oslo-based Hegel has been enjoying something of a purple patch of late: not content with raising eyebrows with the sheer performance of its flagship H590 integrated amplifier [HFN Oct '18], it went on to get dangerously near that level with the much more affordable H390 model [HFN Aug '19], offering almost all of big brother's sound quality for not much more than half the price. Our HFN review concluded that it was 'sensationally good value, with a clean, powerful sound and bags of musicality, not to mention exceptional flexibility including onboard network streaming'. Unsurprisingly, it won the 2019-20 EISA Award for 'Best High-End Amplifier'.

Never let it be said that AQ Technologies is either a follower of fashion or a taker of the easy route: the Milan-based company behind the Aqua range always does things its own way. And while that might sometimes seem like an exercise in making life difficult for itself, the policy typically pays off in the performance, as we discovered when reviewing the Aqua Formula xHD Optologic DAC [HFN Apr '20]. Under the Nextel-finished anti-resonant aluminium casework of that model – one of three DACs in a total Aqua lineup of five products – is a galvanically-isolated resistor-ladder converter of novel design.