Pre/Power Amplifiers

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Review: Andrew Everard, Lab: Paul Miller  |  Aug 30, 2024
hfncommendedWith visuals inspired by JBL’s hi-fi products from the 1960s, the brand’s ‘Classic’ range of separates are populated by technology familiar to audiophiles some 60 years later...

Think JBL and, not unreasonably, you’ll probably think ‘speakers’. The company has been in the loudspeaker business for getting on 80 years, having been founded in California in 1946 by James B Lansing, from whom it takes its name. Lansing himself took his own life just three years later but left an insurance policy to keep the company going, in which form JBL has become an internationally famous audio company and, since 1969, part of what is now Harman International. In 2017 Harman became an independent subsidiary of South Korea’s technology giant, Samsung.

Review: Ken Kessler, Lab: Paul Miller  |  Aug 07, 2024
hfnoutstandingThe hi-fi world’s most powerful amplifier – the aptly named Relentless – has spawned two new offspring, but the ‘baby brother’ of the duo still weighs in at 145kg apiece

Lame analogies – both banal and obvious – spring to mind when one is directed to review an amplifier which is a little over half the power of its predecessor. One thinks of cars offered with engines of half the horsepower of a dearer sibling, of second growth wines, and other half-pint offerings. But the D’Agostino Relentless 800 Mono Amplifier – a heady £236,000 per pair – delivers the wattage that provides its model name: 800W per chassis. And that is conservative.

Review: Andrew Everard, Lab: Paul Miller  |  Jul 21, 2024  |  First Published: Jul 20, 2024
hfnoutstandingHailing from the shores of Lake Constance in Germany, Violectric offers a wide range of headphone and combined DAC/headphone preamps. We dip our toes into its waters...

The Violectric name may be new to you, as it was to me, but behind the brand is a company getting on for four decades in business, principally in the pro audio field, where it operates under the rather unusual moniker of Lake People – inspired by the company’s location in the Lake Constance region of Germany. Like many an audio brand from that country, the company designs and manufactures its products in-house, and is proud of the ‘Made in Germany’ label.

Review: Jamie Biesemans, Lab: Paul Miller  |  Jul 20, 2024
hfnoutstandingIf ever the phrase ‘all-singing, all-dancing...’ could be applied to an audio streamer then Eversolo’s flagship model is the promise given form. The DMP-A8 should take a bow...

Search online and you’ll discover a groundswell of cheap DACs and streamers playing to every (hardware) whim, making it easy to overlook Eversolo’s efforts. But the company, which is the dedicated audio department of Shenzhen-based Zidoo, known for its EISA Award-winning Neo S media player, follows a different, more quality-focused strategy, as the affordable Z8 DAC and DMP-A6 have so far proved.

Review: Mark Craven, Lab: Paul Miller  |  Jul 18, 2024
hfnoutstandingAfter a period of uncertainty, Rotel’s destiny is firmly back in its own hands with new distribution partners in the EU, US and now the UK, courtesy of SME-owner Cadence

The resurrection of Rotel’s Michi series, previously delighting audiophiles in the 1990s, was a hi-fi highlight of 2019. The Japanese manufacturer again created a strand of components (stereo and mono power amps, a preamp and two integrated models) with a focus on both high-end performance and aesthetics, even going so far as to drop the Rotel name from the branding. Then, in 2023, it announced it was revisiting three models in the lineup, making changes inside rather than out.

Review: Andrew Everard, Lab: Paul Miller  |  May 24, 2024
hfncommendedInspired 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.

Review: Mark Craven, Lab: Paul Miller  |  May 20, 2024
hfnoutstandingComplete with a new streaming module, T+A's latest network-attached DAC/preamp is the perfect partner for its PA 3100 HV integrated and A 3000 HV power amplifiers

Tipping the scales at a hefty 26kg, measuring a portly 46cm deep and 17cm tall, and selling for £14,900, T+A's PSD 3100 HV appears every inch the flagship DAC/streamer/preamp. Except that it isn't – that accolade is reserved for the German brand's SDV 3100 HV [HFN Oct '19], which has been deemed its 'reference' model since its arrival in 2019 and remains available for £26,040.

Review: Tim Jarman, Lab: Paul Miller  |  Apr 23, 2024
hfnvintageRising phoenix-like from the ashes of Deltec Precision Audio in 1992, the 'continuity brand' DPA retained designer Robert Watts' flair for innovation. How does it fare today?

The story of DPA is not uncommon among small and specialised hi-fi manufacturers. Arriving in 1992, it actually represented the second iteration of a company co-founded by Robert Watts (who has since gone on to be digital design consultant at Chord Electronics). And while Deltec Precision Audio, which debuted in 1984 with its CTA80 preamplifier, had ultimately shut up shop in the early '90s, the ideas behind its original models clearly had some merit – it was soon back with Watts onboard, albeit under a slightly different name.

Martin Colloms  |  Mar 22, 2024  |  First Published: Mar 01, 2000
hfnvintageMartin Colloms wonders if this all-tube line preamplifier can re-establish Audio Research's supremacy in the exalted reaches of the high-end

As an increasing number of digital source components come equipped with variable output level one might think that line controllers – preamps without a phono cartridge input facility – are an endangered species. This will make sense to those embarking on an all-digital system, mixing a variety of digital sources and prepared to convert from the analogue disc domain to digital via an A/D converter function. Indeed, some digital control units are digital-only and cannot handle analogue signals at all.

Review: Mark Craven, Review and Lab: Paul Miller  |  Mar 07, 2024
hfnoutstandingLess is very much more in BAT's flagship stereo power amp where its third-generation 'SuperPak+' PSU meets a fully balanced output stage featuring N-channel MOSFETs

Here's a fun game to play: look through the product catalogue of US manufacturer Balanced Audio Technology and try to spot the odd one out. It should only take you a matter of seconds because all of its current models, bar one, employ tubes in either their power or preamp stages. And if you still haven't realised I'm talking about the new REX 500 power amplifier, it's the one that's roughly twice as big as all the others.

Steve Harris  |  Feb 23, 2024  |  First Published: Aug 01, 1999
hfnvintageSteve Harris on a small British manufacturer making a bid for the high ground with a single-ended amplifier offering a choice of output valves

In the late 1980s and early 1990s, the audio underground in the US and Europe finally picked up on the efforts of Japanese audiophiles two decades earlier, and started a revival of single-ended triode amplification. The American interest really got going when enthusiasts started salvaging dusty pre-war systems out of old movie houses. Western Electric's 300B triode, dating back to the dawn of cinema sound systems, became the tube of choice.

Review: Andrew Everard, Lab: Paul Miller  |  Jan 15, 2024
hfnoutstandingTaking both aesthetic and design cues from the flagship 159 monoblocks, the 218 power amp is the German marque's newest model, teamed here with the 077 preamp

Never accuse Berlin-based Burmester of timidity... In an interview published to mark the launch of its 216 and 218 power amplifiers, its Team Leader for Quality Management, Thomas Schneider, says, 'We have thought in exactly the right direction'. The 216 amplifier is part of what the company calls its Top Line, and while the 218 may look similar it's actually in the upper tier Reference Line, one step below the Signature Line that features the flagship 159 monoblocks and near-2m-tall BC350 speakers, yours for £233,000 a pair.

Review: Andrew Everard, Review and Lab: Paul Miller  |  Dec 04, 2023
hfnoutstandingThe second phase of Naim's 'New Classics' launch brings a new streamer, a preamp and monoblock power amps, all in redesigned slender casework. Are they true 'classics'?

At times of late, it seems Salisbury's Naim Audio is wilfully courting controversy. It's been causing ripples with the brand's faithful fans ever since it launched its all-in-one Mu-so systems and second-generation Uniti products. It wasn't that these arrivals were on a mission to make hi-fi simpler for all, eschewing the tweakery and 'black magic' once suggested as a prerequisite for realising its true potential – no, what broke the usually calm surface was the fact the Naim logo, for decades lit in green, had turned white. Cue Naim aficionados fanning themselves like Edwardian grandes dames with a fit of the vapours.

Review: Jamie Biesemans, Lab: Paul Miller  |  Nov 24, 2023
hfnoutstandingBuilt into an enhanced H590 chassis but featuring 'sound tuning' from the P30A/H30A pre/power, Hegel's fully-networked flagship integrated gets off to a flying start

After an extended period of Covid and component shortage-related calm, Oslo-based Hegel has seemingly shifted into overdrive, launching multiple new products in just half a year. First up in 2023 was a major update to its flagship pre/power system in the form of the P30A and H30A [HFN Jun '23], followed by the Viking CD player [HFN Sep '23]. The third act is the launch of the H600, which takes over from Hegel's popular, top-tier H590 integrated streaming amp, and sells for £10,500 in a very dark grey, almost matt black finish.

Review: Andrew Everard, Review and Lab: Paul Miller  |  Nov 20, 2023
hfnoutstandingDeveloped 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.

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