Network Audio Players/Servers

In common with Aurender’s two-box flagship N30SA [HFN Jul ’23], the N50 music storage/player is also a network bridge and transcoding/signal conditioning device. Other network bridges with onboard DSP include the Melco N10/2 [HFN Apr ’22], Roon Nucleus Titan [HFN Jun ’25] and Lumin U2x [HFN Nov ’25], each with their own options. Roon’s proprietary MUSE signal conditioning, with its upsampling, parametric and headphone EQ modes, is especially flexible but the N30SA and N50 feature extensive data buffering (reclocking or ‘de-jittering’), emphasising delivery from a very low-noise/low-RFI source. The N50 even includes ‘super capacitor’ battery isolation in its server section, but does this, and all that additional separation, offer any measurable advantage?

As I’ve discussed many times previously, any performance uplift over PC/Mac USB sources is best inferred via third-party DACs, and AudioQuest’s low-cost DragonFly [HFN Mar ’14] – a USB hub-powered DAC – provides us with a good indication of incoming data integrity and noise on the +5V supply. Via the N50 there’s a useful reduction in correlated jitter from 300psec to 100psec alongside a comprehensive suppression of circulating interference/noise [black spectrum, Graph 2], stretching its A-wtd S/N from 94dB to 104dB. Moreover, as we saw with the N30SE, there’s also a reduction in clock phase noise – realised in the tighter ‘skirt’ at the base of the peak.

Again, a great improvement was realised via iFi Audio’s NEO iDSD [HFN Mar ’21], where its repeating ±33/66/99Hz sidebands were attenuated from 550psec to a residual ~5psec [red vs. black spectra, Graph 1] via the N50. Our reference DAC, the dCS Varèse [HFN Feb ’25], with its full galvanic isolation/onboard reclocking, betrayed a marginal squeezing of residual jitter between PC/Mac and N50 ‘USB sources’, and although the 118.1dB A-wtd S/N was unchanged there were very subtle differences in low-level noise and uncorrelated spuriae. PM