Pre/Power Amplifiers

Following last month's batch of integrated amplifiers costing under the £200 mark, more advanced models have been chosen for this project. The new Mission 778 (Mission Cambridge) represents the UK contribution (£240). The Harman Kardon PM650 combines Japanese and American design (£250), while the European contender is the Revox B251 (£900 plus £45 for the remote controller). All three models are integrated amps with MC and MM input facilities. I also look at another new UK model, the powerhouse P128 from Sugden, which is a dual 'monoblock' power amp (£395).

In these evolving days of digital music, cloud storage and online streaming, it might seem counter-intuitive for Musical Fidelity to release a line-only amplifier and 'plain vanilla' CD player. The £799 M2si integrated has no inbuilt DAC, no Bluetooth, no Wi-Fi and not even a phono stage, or indeed the option of one. And, peer round the rear of the matching £799 M2scd compact disc player, and the only connections you will find are outputs. Once again, it has no digital inputs, no antennae sticking out and no wireless wizardry up its sleeve. What's going on?

Everyone old enough to remember, talks about the 1970s as the golden age of British hi-fi. That's certainly true in one respect, because what was a niche – often do-it-yourself hobby – went completely mainstream, to the point where the third most expensive consumer item, after a house and a car, was a stereo.

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...

For the past four years, I've been waiting impatiently for a stab at the electronics from Air Tight. I admit that the charm of the name, the absolute perfection of that moniker for a brand of valve amplifiers, caught my attention as much as did the obviously exquisite manufacture. The price, too, appealed, considering that these amplifiers promised peerless construction and attention to detail you just don't find this side west of a Jadis. At last there's a UK importer, so my wait is over.

At the risk of tempting fate, I wonder whether there's a power output arms race going on between manufacturers. The arrival of the new Ultima power amplifiers from Chord Electronics – at £30,000 apiece in either silver or black, along with the matching (and similarly-priced) Ultima preamp – suggests so. After all, their rated power of 780W/8ohm load is just north of the 768W claimed by Naim's 'Statement' NAP-S1 monoblocks [HFN Jun '15] – a target vaunted as 'one horsepower'. In practice, Naim's NAP-S1 achieved 795W/8ohm in PM's lab tests at the time, but it seems that in the current ultra-high-end amp scene, there ain't no substitute for cubic inches – or something like that.

There's nothing terribly unusual about a big, hefty US-made power amp: after all, it's almost an archetype of what we think the US high-end is all about. Long cable runs from preamp to power amp(s), short tails to the speakers – it's just the way they do things over there, and at first glance the Parasound Halo JC5 seems to conform to all those preconceptions.