Integrated Amplifiers

Hailing from Treviso in northeast Italy, Unison Research is a brand with an obvious love of tubes, to the point that you half expect to find a hot bottle or two incorporated in its Malibran and Max loudspeakers. Its CD players, the Unico CD Uno and Due [HFN May ’16], have tube-based output stages, while the solid-state amps in the same series have tube-based inputs. But the company is best known for its all-tube amplifiers, of which there are 15 spread across integrated, pre and power ranges.

While not a household name in the UK, the Warsaw-based Unitra brand caused quite a stir in its native Poland when revived in 2021. Its storied past played a role in this, but so did the reimagined products themselves, thanks to their nostalgia-inducing 1970s aesthetic. Moreover, while the new Unitra designs are predictably more up-to-date under the hood, they sport some idiosyncratic features. The monochrome E ink display of the CSH-801 CD player is an illustration of this, as are the remote-actuated lever switches on the £4499 WSH-805 auditioned here.

So overwhelming is the matter of choice when putting together a system that it can cause as much anguish as pose a fun challenge. What type of speakers? MM or MC pick-up? Integrated or separates? These usually sort themselves out due to space or budget, but 'tubes versus transistors' almost calls for a leap of faith – unlike 'digital versus analogue' because most enthusiasts can manage two sources. The valve/solid-state conflict, though, may find a cure in the Vinnie Rossi L2i-SE integrated amplifier, the 'SE' standing for 'Signature Edition'.

The Wharfedale Linton loudspeaker is one of those hi-fi products that seems to have been around forever. It has been produced in many forms and is still with us today in ‘Heritage’ guise. The original Linton, Super Linton and Linton 2 were all strong sellers in the 1960s and ’70s and many listeners will have heard, owned or borrowed a pair at some stage. Lesser known was Wharfedale’s complete Linton system, which was offered in hi-fi’s boom years of the early 1970s. It is the amplifier from the first version of this which we are looking at this month.

Big, bold and unashamedly old-school with its silver finish – black is available as an option – polished piano black side panels and large illuminated meters, the £4999 Yamaha A-S3200 is the flagship of the brand's integrated amplifier range, which kicks off with the modest £200 A-S201.

For a brand name that appears on very diverse products, from grand pianos to outboard motors, it’s amazing that Yamaha has little in the way of high-end head-fi – the company was a very early adopter of planar-magnetic headphone technology, after all. The HA-L7A DAC/headphone amp is the second product launched to address that deficiency, following on from the YH-5000SE headphone, which garnered an EISA Award last year and is a spiritual successor to the legendary HP-1 from ’76.