Pre/Power Amplifiers

Developed to celebrate Krell's 40th anniversary, the KSA-i400 combines all the brand's proprietary circuit ideas in one very powerful amplifier. We partner it with the Illusion II

Over time, most hi-fi brands develop an image: ask any audiophile and you'll be told this one is warm, that one is all about rhythm and timing, and another is 'bright and detailed, but I could never live with it'. Of such generalisations, myths are born, and I'd say it's a pretty safe bet that most enthusiasts 'know' what Krell is all about – big, heavy, and massively powerful American amps, with the ability to drive just about any speaker to any level you want, or could imagine.

Inspired by Leema Acoustics' flagship Constellation series, this pre/power combination is the first fruit of the Welsh brand's new Quantum range. Does the Graviton have gravitas?

The tone of the announcement of the new Leema Acoustics Quantum range has the air of a Hollywood blockbuster: '25 years in the making…' it begins. But perhaps this hyperbole can be forgiven as this is the Welsh company's first new range in more than ten years and sees the technology of its flagship lineup simplified to reach more affordable prices. Here we have the first two Quantum arrivals, both available in silver or black – the Neutron preamp, with 13 inputs including a built-in DAC, is £1500, as is the Graviton stereo power amp, rated at 150W/8ohm. Buy the two together and you save £200, bringing the package price down to £2800.

The Pyxis is a sturdy, handsomely-styled preamp which, in the best modern fashion, can be used with all manner of amplifi ers despite a plethora of Leema-only features. Pyxis provides both fully-balanced and single-ended analogue operation, with extensive custominstall/ home cinema-friendly settings and sockets. Its price is further ameliorated by the inclusion of digital ins and outs, including USB and S/PDIF in both directions, so the Pyxis is able to accommodate all of your digital sources and feed a computer for archiving. For another £500, the Pyxis can be supplied with an onboard phono section (based on Leema’s £3k Agena).

Now in mkII guise, Lindemann's network-attached DAC and analogue preamp sees a raft of internal updates and the promise of 'production secured for upcoming years'

Look at the latest iteration of Lindemann's network music player, the £3450 Musicbook Source II, and you'd be forgiven for thinking that nothing much has changed [HFN Jun '20]. This is still a compact unit, just 28cm wide and a mere 6.3cm tall, with nothing much on show save a power/standby button sunk into one end of the top-plate and an edge-mounted volume control, with a push-to-mute function, at the other.

Continuing its modern take on traditional Japanese purist amplification, Luxman finally offers a MM/MC phono/line preamp partner for its ultra-retro MQ-300 valve amplifier

Just over three years ago I had my first taste of cost-no-object Luxman [HFN Nov '16] in an achingly long time. The company has had its ups-and-downs, but fortunately its new owners – IAG, home to Quad, Wharfedale, Audiolab and Castle Acoustics – realise what a plum brand Luxman is, so it was expected that the flagship MQ-300 power amplifier which so charmed me would be followed by a worthy preamp. Enter the alluring CL-1000, at £16,000 a grand more than the power amp and looking every penny of its price.

Luxman’s update of its fully-loaded, flagship headphone amplifier has resulted in the heavyweight P-750u – is this incarnation a contender for the best of the breed?

Decades on from the likes of the EarMax, AudioValve RKV and other pioneering headphone amps, born before cans became a ‘thing’, we are now spoiled for choice. Luxman, which has been on dazzling form of late, has upgraded its no-compromise champ to produce the P-750u, and it just may be the go-to unit if you’re 1) crazy for cans, 2) use various models and 3) love added fine-tuning control.

Here’s a traditional triode tube amplifier with a modern twist as Manley’s evergreen Neo-Classic 300B proves there’s more than enough power to energise your music

Are you the hands-on type who finds most power amps a bit boring because all they have is an on/off switch? Manley Laboratories’ Neo-Classic SE/PP 300B monoblock (£13,699 per pair) is the opposite: it lets you fine-tune the sound by fine-tuning the applied feedback.