Headphones

The name of this new product from Polish company HEM, selling under its Ferrum brand, is spelt ERCO, but pronounced 'ertso'. Apparently it's Esperanto for 'ore', and so follows on from the mineral-based brand-identity – Ferrum, OOR – you get the idea. What's also not immediately apparent, given that all the Ferrum products basically look the same, is that the £2395 ERCO is perhaps the most comprehensively equipped model the company has made to date.

The new Astell&Kern ACRO CA1000 desktop player/DAC/headphone amplifier, selling for £1999, has a raft of functionality built-in – and yet I'm still not quite sure who it's for… Of course, this is far from the first step beyond its core expertise in high-quality pocket music players taken by the company. After all, it's already given us the extraordinary AK500 stack system [HFN Apr '15], active speakers and the chunky ACRO L1000, its first desktop headphone amp/DAC.

Polish company HEM, based just outside Warsaw in Pruszków, had something of a dream debut for its Ferrum brand: its first-ever product, the Hypsos power supply collected a 2021-22 EISA award in the Hi-Fi Accessory category [HFN Mar & Oct '21]. The judges praised it as 'a potent upgrade for a wide range of devices, not least USB DAC/headphone amplifiers, typically encouraging a sound with greater ease and smoothness – and yes, power!'

With modern smartphones able to offer high-resolution audio playback, the market for dedicated portable audio players is now fairly niche. One of the biggest fish in this relatively small pond is Astell&Kern, which offers an extensive range of models priced between £625 and £3400. These are divided into four lines – KANN, A&norma, A&futura and A&ultima – with the £1099 KANN Alpha being the latest addition to the KANN series and slotting in between the existing KANN and KANN Cube players on price.

Seemingly there's no stopping Southport-based iFi Audio: it just keeps on trotting out new digital products, all aiming to fill a gap in the market – or create a new gap to fill. Indeed, while writing this review I was unsurprised to see another new launch pop up, in the form of the bright red iDSD Diablo.

Writing in his Welcome page last month, editor Paul Miller explained how shifting hugely heavy equipment about is all part and parcel of the HFN reviewing 'experience'. Perhaps he was eyeing a recent speaker launch proudly declaring that its new products weigh over 450kg apiece. Add on their external crossover with its power supply, and a quartet of high-quality amps to drive them, and you could well end up wondering whether your floor will support a tonne and a half of hi-fi.

We've come a long way since iFi Audio was started as an offshoot of high-end brand Abbingdon Music Research, building its initial reputation with its 'Purifier' products, designed to clean up digital signals. And if anyone was labouring under the delusion that these were devices designed to tackle non-existent problems – you know, the old 'digits is digits' thing – the company has since expanded into making everything from complete systems to some of the most cost-effective DACs and headphone amps around. After all, its excellent xDSD [HFN Jul '18], was a 2018-19 EISA Award-winner, following on from the 2014-15 winning footsteps of the nano iDSD [HFN Dec '14].