Antipodes Audio Oladra Network Audio Library Lab Report

Lab Report

Because the Antipodes Oladra, like music library/reclocker/server solutions from Melco, Aurender, Auralic, Innuos and others, is a data storage and delivery device, any technical or subjective uplift in performance – over a conventional NAS or PC/Mac USB solution – is best inferred via an attached, third-party streaming player or DAC. Identifying any reduction in jitter or circulating RF interference from the Oladra also depends on the USB sink's jitter suppression and/or galvanic isolation, so a USB DAC with excellent data recovery/reclocking may not express a significant difference. Similarly, any DAC with its own 'baked-in' sources of jitter will not be improved by pristine digital data from an outboard source. Ironically, it is the more rudimentary USB hub-powered DAC/headphone amp solutions, like AudioQuest's original DragonFly DAC [HFN Mar '14], that provide us with the best indicator of incoming data integrity and noise on the +5V supply. In this instance while there's a useful reduction in correlated jitter over USB from 300psec (desktop PC) to 120psec (Oldara) it's the almost wholesale suppression of circulating interference (spuriae), and improvement in A-wtd S/N from 94dB to 104dB, that will exert the subjective impact [see Graph 1].

A similar 'cleaning up' was also observed with iFi Audio's NEO iDSD [HFN Mar '21] where the 550psec of ±33/66/99Hz sidebands collapsed to just 10psec [see Graph 2] with the Oladra as USB source. Despite this ~2dB reduction in uncorrelated jitter/quantisation noise no change was seen in the NEO iDSD's 4.29V peak output, minimum 0.00015% THD (re. 1kHz/–10dBFs) or 109.7dB A-wtd S/N ratio. Other USB DACs tested, including the Mytek Brooklyn [HFN Aug '17] and dCS Vivaldi One APEX, have sufficient galvanic isolation/onboard reclocking that very little difference in jitter was observed between the test PC and Oldara USB sources. Minor variations of just ±1-2psec – within the limit of measurement – were detected despite an ostensibly greater visible reduction in the finest spuriae. Every little helps... PM


48kHz/24-bit jitter spectra from AudioQuest's DragonFly (via Antipodes Oladra, black; and PC, red)


48kHz/24-bit jitter spectra from iFi Audio's NEO iDSD DAC (via Antipodes Oladra, black; PC, red)

Digital input/outputs 2x Ethernet; 2x USB-A 3.0
Digital outputs 1x USB-A; 3x S/PDIF; 1xAES3; 2xI2S
Digital jitter (AQ DragonFly) 120psec (300psec via PC USB)
Digital jitter (iFi Audio NEO iDSD) 10psec (550psec via PC USB)
Digital jitter (Mytek Brooklyn) 8psec (8psec via PC USB)
Power consumption 20W (1W standby)
Dimensions (WHD) / Weight 445x80x400mm / 21kg
Price £25,000

Antipodes Audio Limited
Kapiti Coast, New Zealand
Supplied by: Elite Audio Ltd, Fife
01334 570 666