Outboard DACs

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.

At this stage in the decline of Compact Disc's popularity, is there still a demand for CD players like the Audio Research REF CD9 SE at a heady £14,500? Apparently so, as the original REF CD9 [HFN May '13] remains popular enough to warrant an update. The addition of the esteemed 'SE' suffix on this occasion, however, does not signal as radical a change as seen, for example, in the move from the REF 75 power amp to the REF 75SE. But what Audio Research has done makes it just different enough to warrant the new badge.

Arriving to crown Audiolab's top-flight 9000 series, which launched with the 9000A integrated amplifier and 9000CDT CD transport [HFN Aug '23], the 9000N is arguably the most intriguing model in the range. This streaming DAC, priced at £2499, and styled to match, marks a point of departure for the brand as its association with DTS Play-Fi is cut in favour of a new streaming platform and app.

As we described in our review of AudioQuest's original JitterBug [HFN Oct '15], this little serial plug-in is not a re-clocker for digital datastreams, but rather a purely passive device (drawing no power from the USB hub) that provides transformer-isolation and RF filtering of both the 5V USB 'VBUS' and its differential data lines. The promise, according to AQ, goes something like this: 'the dual-discrete noise-dissipation circuits reduce internally generated RF noise for improved streaming audio, [reducing] jitter and packet errors'.

The trouble with many modern hi-fi ranges is trying to work out what each of the boxes does. I've recounted before the tale of the tower of identical-looking Linn components stacked up in the premium lounge of a well-known airline, and the amusement there was in watching 'elite' passengers trying to work out where to insert their Dire Straits CD. Similarly, Auralic also has a wide range of digital devices, and given that they all look alike, it's sometimes hard to work out what does what.