Integrated Amplifiers

Most hi-fi enthusiasts know how many watts their amplifier can produce, but does that figure tell the whole story? In the early '80s, Harman Kardon's HCC (High Current Capability) range of integrated amplifiers gave listeners another number to think about, which was how much current an amplifier was able to source.

Oslo-based Hegel has been enjoying something of a purple patch of late: not content with raising eyebrows with the sheer performance of its flagship H590 integrated amplifier [HFN Oct '18], it went on to get dangerously near that level with the much more affordable H390 model [HFN Aug '19], offering almost all of big brother's sound quality for not much more than half the price. Our HFN review concluded that it was 'sensationally good value, with a clean, powerful sound and bags of musicality, not to mention exceptional flexibility including onboard network streaming'. Unsurprisingly, it won the 2019-20 EISA Award for 'Best High-End Amplifier'.

HiFi Rose delighted, and in some cases flabbergasted, hi-fi enthusiasts with its RA180 [HFN Jul '22], an amplifier that looked like it had just escaped from the pages of Gibson-Sterling's steampunk classic The Difference Engine. Boasting lots of knobs and dials on the outside, and novel GaN FETs in its Class D power amp on the inside, it was undeniably 'something else'. It was quite an unexpected product from the Seoul-based brand too, as up to that point HiFi Rose was principally known for streamers and DACs with very large touchscreens [HFN Jun '21 and Mar '22].

Another smart move from the Korean tech specialist? That certainly seems to be the case with the latest arrival from Seoul-based HiFi Rose, which has rapidly established itself as a major player in the network audio/video market with a string of excellent streaming players. Having taken what looked like an abrupt turn with the launch of its bonkers-styled – but great-sounding – RA180 integrated amplifier [HFN Jul '22], it's now delivering on the promises made by the company's Sean Kim, interviewed for that review. We're yet to see the simpler, more affordable RA280 integrated amp, but here's the company's all-in-one streaming amp, the RS520.

The first Stereo 40 tube integrated amp arrived in the year 2000, and according to Icon Audio's founder and chief designer David Shaw, 'is the heart of what we do'. It's the metaphorical ham sandwich of the valve amplifier world – the staple diet of audiophiles wanting a simple, affordable, user-friendly integrated that offers classic tube sound and some interesting features too. This new £2200 Stereo 40 MkIV sits bang-smack in the middle of the range and, as claimed, is uncommonly versatile.

Until the mid-1990s, valve amplifiers were typically persona non grata. The '80s had been all about solid-state – from tweaky low-powered integrateds to mega powerful monster power amps – and tubes didn't so much as get a look in. By the turn of the millennium however, the pendulum had swung back and tube amps were reinvented as exclusive objects of luxury and desire, famed for their sweet and satisfying sound. How times change!