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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.

In the decade since the launch of the LS50, in celebration of KEF's 50th birthday [HFN Jul '12], there have been rumours about a floorstander to complement the popular bookshelf model. But whatever these wishful thinkers had in mind, I'm pretty sure it wasn't as outlandish as the LS60 Wireless. As the name indicates, it's both a nod to the 60th anniversary of the brand and its technical evolution by incorporating active electronics – DSP, DAC and amplification – and streaming.

This isn't our first encounter with the valve amplification from Swedish company Engström, the ERIC Encore power amps [HFN Oct '21] lighting our blue touch paper of interest. The ARNE integrated amplifier, its 'entry-level' offering, is quite possibly an amp best suited to what comedy writer Danny Robins made famous as 'The Cold Swedish Winter', it also doubling as potent heat source. The curvaceous glass cover protecting the pairs of power triodes gets very warm indeed, so this amp needs plenty of 'fresh air'.

Since launching in 2012, iFi Audio has established a reputation for delivering affordable, compact, often portable audio products. And at some pace too – looking back over the past decade, it's hard not to feel overwhelmed by the number of devices the company has released. Not all are entirely 'new', because iFi Audio likes to 'tweak' its products, which is why the xDSD Gryphon tested here follows the EISA Award-winning xDSD DAC [HFN Jul '18], and also serves as a successor to the xCAN [HFN Feb '19].