Pre/Power Amplifiers

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Review: Andrew Everard, Lab: Paul Miller  |  Oct 10, 2022
hfnoutstandingGermany's 'Sound Performance Laboratory' has launched its largest stereo power amp yet. We pair the s1200 with SPL's Elector preamp for a big-hearted, all-analogue system

Based some 40 minutes west of Düsseldorf, SPL sounds like an attractive prospect for those who like their music loud – though in this case the name has nothing to do with Sound Pressure Level, standing instead for 'Sound Performance Laboratory'. Mind you, the promise of room-shaking raises its head again with the new flagship power amplifier in the company's domestic – or 'Professional Fidelity' – range, which promises 'Mastering Grade Listening'. The new Performer s1200 (£6499) may only measure a smidge under 28cm wide and a little over 20cm tall, making it a tiddler in the pantheon of high-end stereo power amps, but it's still capable of a claimed 300W/8ohm, rising to 520W/4ohm. This should be more than enough for even the most demanding speakers and level-hungry listeners.

Review: Tim Jarman, Lab: Paul Miller  |  Dec 01, 2017
hfnvintage.pngDesigned by James Sugden in collaboration with Richard Allan, is the second iteration of this milestone Class A transistorised amp the one to buy? It's time to check it out...

The late '60s provide an interesting choice of equipment for the vintage hi-fi enthusiast. The rapid development of high-quality transistor amplifiers during the period resulted in some intriguing models and the Sugden A21 is a fine example. Why? Because it was the first successful domestic hi-fi amp on the UK market to offer a fully transistorised implementation of Class A.

Review: Mark Craven, Lab: Paul Miller  |  Jun 16, 2022
hfnoutstandingNow a full quartet, T+A's compact but beautifully formed Series 200 has expanded to include a media player, DAC/preamp and Purifi Eigentakt Class D stereo power amp

Siegfried Amft, founder and MD of T+A, declares the intent of the brand's Series 200 is to 'combine the appearance of a Midi system with a high-end performance'. Midi, of course, is a word that evokes memories of 1980s/'90s hi-fi, so I'm surprised to see the term attached to a range that's rather more aspirational in its technology. You might think something has been lost in translation, T+A being a German manufacturer, until you lay eyes on the DAC 200 and its button-heavy compact chassis. From the appearance side, at least, the 'Midi' mission has been accomplished.

Review: Andrew Everard, Lab: Paul Miller  |  Dec 01, 2018
hfnoutstanding.pngThe sound of music is raising the rafters in Eastern Westphalia as Germany's T+A celebrates its 40th anniversary with a set of very special monoblock hybrid amplifiers

Not so much monoblocks as monoliths, these new flagship power amps from Germany's T+A certainly have what you'd call 'in room presence'. At least they do when you have got them in position, a task hampered by the fact each is a 50kg+ dead weight, although admittedly the two substantial handles sprouting from the top panel – and the assistance of a friend – will help.

Review: Andrew Everard, Lab: Paul Miller  |  Nov 12, 2020
hfnoutstandingWith some sensible internal revisions, the German company has made its heavyweight preamplifier even more precise and detailed, without sacrificing any of the music's soul

You can tell a lot about a company from the title it takes for itself – from the name of the founder to classical or musical allusions to the equivalent of go-faster stripes, every brand seems to set out its stall in a somewhat different way. German manufacturer T+A elektroakustik is no exception, except here the name – the initials stand for 'Theorie und Anwendung', Theory and Application – is saying 'we're no-nonsense, and led by engineering'. Or, as the company puts it in a brief bio, 'Actually we're scientists…'.

Hi-Fi News Staff  |  Jan 20, 2015
Each of these three units – preamplifier, two-channel power amp and a power supply to ‘beef up’ the power amp’s performance – is housed in an all-aluminium chassis identical in size and appearance. Pre and power amp are ‘double mono’, the left and right channels both electrically and mechanically separated, with power supply sections, audio circuits and control electronics all in shielded chambers. The new P3000HV preamplifier has a comprehensive functionality that includes an analogue tone processor module to provide bass/treble adjustment, a user-variable ‘loudness’ control to suit your loudspeakers’ sensitivity, and parametric equalisers for tuning your speakers’ bass performance to your listening room. Illuminated touch-sensitive controls allow access to the preamp’s configuration menu, and a headphone amp is built in as well.
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.

Steve Harris & Paul Miller  |  Feb 06, 2009
Reacquaintance can be a fraught affair, as anyone who has met an old lover after many years will attest. You risk either discovering that you are still in love with them, which is usually bad news, or wondering whatever attracted you in the first place. Neither outcome is good for the ego. It’s much the same when revisiting an audio product.
Hi-Fi News Staff  |  Nov 13, 2014
This lavishly-built C600 preamplifier and unusual looking partnering M600 monoblocks [not shown] are TAD Labs’ ‘Reference’ amplifiers. The C600 preamp’s aluminium subchassis is 33mm thick and weighs 15kg alone, designed to resist acoustic vibration and provide a ‘low and stable ground potential’, says the company. Removing the preamp’s top plate reveals its dual mono construction and all-discrete signal path; it’s a fully balanced design. The power supply, with its massive transformer, is a separate ‘hideaway’ unit.
Hi-Fi News Staff  |  Jan 22, 2015
Teac’s HA-501 is a Japanese product of the old school, with no-nonsense looks and a quality of fit and finish that belies its £700 asking price. Teac highlights a number of aspects of the 501’s circuit design. First that it operates in Class A, as evinced by the case running warm to the touch. Second, dual mono construction is clear when you remove the top plate to reveal two identical circuits side by side on the main PCB.
Review: Tim Jarman, Lab: Paul Miller  |  Aug 01, 2018
hfnvintage.pngLaunched in 1980, these slimline separates proved just the tonic for those seeking sophisticated sonics wrapped in eye-catching casework. How do they sound today?

Who buys top quality hi-fi equipment? First there is the audiophile, who is willing to devote considerable resources in the pursuit of components that deliver what he or she regards as the best sound quality for a given budget. There was once also a largely non-technical group who had equally high musical expectations. Wealthy and design conscious, they wanted complete systems that not only sounded good but looked good too, and included all the latest technological refinements.

Ken Kessler  |  Aug 19, 2022
hfnvintageKen Kessler explains why he believes Audio Research's Reference 1 preamp and Reference 600 power amplifiers are in a class of their own

Whatever your response to once-in-a-generation revelations, the Audio Research Reference 600 monoblock amplifiers and the matching Reference 1 preamp will render all who hear them something akin to 'gob-smacked'.

Martin Colloms  |  Apr 25, 2023  |  First Published: Aug 01, 1991
hfnvintageMartin Colloms hears the FET nine/e and SA/3.9e from Threshold – a company that can lay claim to being one of the founders of the high-end...

Threshold has been making high-quality amps for many years, its preamps showing early use of FET circuitry and the power amps distinguished by an output stage design which Threshold calls 'Stasis', a kind of active Class A operation. Company founder and chief designer, Nelson Pass, remains fully involved and his signature appears on the circuit diagrams included in the excellently documented operating manuals supplied with the units.

Ken Kessler  |  Feb 24, 2022  |  First Published: Mar 01, 1992
hfnvintageThe irrepressible Antony Michaelson is at it again, with pre and power amps from Michaelson Audio and Musical Fidelity. Ken Kessler listens

Upon my taking delivery of the review samples of Da Vinci, about which I was warned in mid-summer 1991, company founder Antony Michaelson launched into his usual tirade about the high-end, with barrels of venom for American ballbuster amps in particular.

Ken Kessler & Paul Miller  |  Apr 06, 2009
Back after a hiatus of nearly a decade, Trilogy’s founder Nic Poulson has returned to amp manufacture, having spent the interim producing mains filters and regenerators. Both the promise and the standards of Trilogy ‘Mk I’ have been maintained in the rebirth, but with new twists, including microprocessor control. Poulson has revived Trilogy with three models, continuing the 900-nomenclature of the 1990s units. The 909 preamplifier will most amuse the tweaker because it’s all-valve, using three ECC88/6922s and a 6U4P rectifier, but it boasts features usually found in cutting-edge solid-state products, or valve exotica from the likes of VTL, McIntosh and other American makers.

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