Outboard DACs

Twenty years or so ago, standalone DACs were fast becoming an endangered species. The breed had a brief moment in the sun in the early '90s, with almost all CD player brands fitting digital outputs, but until the advent of USB audio, the add-on digital box was on the wane. Now, with the rise of digital streaming, network-attached DACs are the gift that keeps on giving, for hi-fi brands and buyers alike.

Well, it makes a change from the usual choice of silver or black… Yes, you can have the German-made SPL Phonitor xe USB DAC/headphone amp, which starts from £1899 depending on specification, in either of those colours if you want, but it's also available in the bright red anodised finish you see here. Not that it needs colour to catch the eye for the unusual battery of features makes it either intriguing or something of a head-scratcher: what do all those knobs and switches do? And then there's the pair of illuminated, retro-looking VU meters – this is clearly not your common or garden DAC/headphone amp.

In common with a lot of HFN readers, I have a bit of a 'thing' about overly complex digital devices. I'm not referring to input flexibility – many of us will have systems in which different flavours of digital connection are accommodated, from USB links from a computer to good old S/PDIF from a CD player or the like. No, what I really find obstructive is devices bristling with digital-domain options, from filters to dither to PLL bandwidth and the like, all of which often look like an exercise in 'because we can' – a facilities arms-race – rather than being of any real-world assistance to the user.

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.

Italian manufacturer Audio Analogue's 'PureAA' line was spun out of the 20th anniversary models the company launched back in 2016. The range now runs to three models, of which the AAdac is the latest arrival, bringing digital capability to a range that was otherwise purely 'analogue'. Like the other PureAA models and Anniversary amplifiers, the AAdac is a co-operation between Audio Analogue and stablemate AirTech, and is very much Realizzato è Costruito in Italia. There's certainly none of that offshoring the entry-level line here.

When is a DAC not a DAC? When it turns into a multifunctional network-connected music player, that's when! Increasingly, the lines between products that exist to convert digital inputs into analogue audio and full-blown network players are becoming blurred. So, just as there are players provided only with digital outputs – network transports or bridges to be paired with an outboard DAC – so we now have DACs with network capability built-in. Add an app running suitable UPnP control software, and you have a complete streaming solution.

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].