Pre/Power Amplifiers

It is not unusual for products featured in Hi-Fi News to rival a family car for cost. But a pair of monoblocks that weigh as much as a car and cost as much as a house? While that is surely breaking new territory for us all, the prospect of 'stretching the envelope' in power output, industrial design and sheer audio performance was clearly uppermost in CEO Dan D'Agostino's mind as he contemplated the next step on from his 400W/8ohm Momentum monoblocks [HFN Oct '16].

It was back in 1995 that the Italian brand, Audio Analogue, launched its first product – the Puccini amplifier. A no-nonsense stripped-down integrated, it offered little more than an input selector and a volume knob, yet its no-frills approach won many fans. Subsequently the company has built a well-deserved reputation for providing a range of fine-sounding and stylish-looking amplifiers, and has also taken to the CD player market with models such as the Maestro and Crescendo.

Back in the late 1970s Bob Stuart of Meridian observed that an amplifier has more inputs than those labelled as such, others being 'output' and 'mains'. It was an idea to which lip-service was widely paid but, on the mains side, nobody really picked up the idea and ran with it until PS Audio introduced its first mains regenerator in 1998. Yes, we'd had mains filters and conditioners of various types before but this was the first device that said that if you want the cleanest mains supply you're going to have to synthesise it from scratch.

At first glance, one might be forgiven for wondering what's going on here – after all, California-based Constellation Audio already has a Centaur II stereo power amplifier on its books, selling for a not inconsiderable £48,000. So the $64,000 question must surely be 'what is this second version, dubbed the Centaur II 500 Stereo, bringing to the party?'.

Surprises, at my age, could prove fatal, so I neither invite nor encourage them. Even pleasant ones. Neither do I relish my preconceptions being challenged: 'Old dogs, new tricks...' That said, and despite spending countless hours listening to assorted Constellation systems over the years, I must admit to being unexpectedly bowled over by these Inspiration Mono 1.0 power amplifiers.

Having followed Auris Audio from show to show since its 2013 founding, I leapt at the chance to review its stylish Nirvana two-chassis headphone amplifier. I'm no longer shocked by the cost of high-end headphone amps, especially not at a time when £3000 headphones are common, so its £4900 price tag earned a mere 'Meh' from me. After all, I'd be putting it through its paces with, among others, the Audeze LCD-4Z, which sells for £3600.

For a while, the amplifier combo you see here was almost literally the elephant in the editor's listening room. Delivered for review just at the end of 2018, its sheer mass – 28kg for the £12,500 Strumento No1 mk2 preamp alone, plus a further 95kg for the No4 mk2 power amp, which sells for £16,250 – defied almost all efforts to move it into PM's lab for test work before I could listen. It finally inspired our esteemed editor to relent and buy himself a trolley – and so, at last, the review literally began to roll...