Integrated Amplifiers

Based in Treviso, Italy, Unison Research has long specialised in making very traditional looking tube amps with polished wooden chassis and rows of glowing bottles on display. At the same time its Unico series has adopted a more mainstream aesthetic and includes valve-based amplifiers that, well, don't really seem like valve amplifiers. Despite an outward appearance suggesting a completely conventional integrated amp, the Due – which sells for £2500 in standard silver with black available at a £100 premium – is very definitely a valve amp, or at least half of one.

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.