Headphones

Did Ifi Audio actually need to upgrade its Neo Idsd Dac/Headphone Amp? Well, change is seemingly inevitable in the fast-moving range of this Merseyside-based company, given the pace with which products - new and revised - seem to flow from its own factory in China. Indeed, there's an element of 'blink and you'll miss it' about iFi Audio's releases, which now encompass a wide range of hi-fi devices from pocket headphone amplifiers to products aimed at the pro audio market.

With its wide range of portable, battery-powered DACs and headphone amplifiers, few companies have done as much as iFi Audio to improve listening on the hoof. Yet the new iDSD Diablo 2, its latest range-topping model and a replacement for the iDSD Diablo of 2021, pushes the envelope of the mobile DAC/amp genre, both by being far from budget at £1299, and large enough for its manufacturer to deem it more 'transportable' than genuinely 'pocket-size'.

After collecting an EISA Award last year for a complete headphone system featuring a stack of four mini-sized separates – the Staccato, Tradutto, CH-Amp and PSU-3 [HFN Oct '22] – EarMen has doubled back with this minimalist ST-Amp. This is a book-sized, do-it-all unit combining a DAC and dedicated headphone amp, aimed at head-fi enthusiasts looking for a quick and effective path to high-quality desktop listening. So while the ST-Amp moniker might suggest it's simply a more affordable alternative to the aforementioned CH-Amp, it's really a different beast altogether.

Headphone use has changed in recent years, from something to be endured through necessity to its own subset of hi-fi listening, with no shortage of ambitious and upmarket hardware currently available. Now dCS is on that bandwagon, for while it's been busy launching its APEX DAC technology for its 'full-size' offerings [HFN Jun '22] it's also developed the Lina, which is not so much a headphone amp as a complete playback system.

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].

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.