iFi iPurifier2 USB Audio Power Filter

"A No-Brainer for Best Audio Performance"

The USB audio platform is well-established for music streaming, but as with any audio transmission protocol, unwanted factors hinder the audio quality. iFi' Audio's obsession with 'cleaning up' the USB audio chain is drawn from the extensive knowledge base of Abbingdon Music Research (AMR). As early as 2012, iFi invented the first USB power regenerator, the iUSB Power. This was swiftly followed by the USB audio filter, the original iPurifier. Fast-forward to today and we now have the iPurifier 2.

Featuring an all aircraft-grade CNC-aluminum shell, the iPurifier 2 features the very latest USB audio technology from Active Noise Cancellation to REclock and Regenerate technologies, while still retaining the original Rebalance circuitry. Most effective at the end (rather than the beginning) of the 'digital USB audio chain' the iPurifier 2 cleans up the USB transmission. There is an iPurifier 2 perfectly suited to every DAC.

"In my opinion, adding the iPurifier2 into your audio chain is a no-brainer if one desires the absolute best in audio performance, notes reviewer Bansaku at head-fi.org.

Active Noise Cancellation Drawn from Military Radar Technology

Drawing from the military field (specifically the Thales Spectra radar cancellation system deployed in the French Dassault Rafale jet fighter), iFi adapted this technology to exclusively introduce the Active Noise Cancellation (ANC) audio power system. ANC technology is now a cornerstone of the iFi USB technology range.

Air defense radar is transmitted at a certain frequency. When the signal bounces off the aircraft, a receiver on board the aircraft picks up the signal and a computer analyses its base frequency/modulations, and an identical, but out-of-phase signal is then generated to cancel out the enemy radar signal.

By generating a signal identical to the noise signal but in the exact opposite phase, ANC completely cancels all the incoming noise. ANC is the perfect 'antidote' for power supply noise, which is the bane of USB audio. With ANC the power line is filtered for RF noise. The measured noise floor of 0.5uV (0.0000005V) is at the measurement limit of the Audio Precision equipment.

Using ANC, the background and inner resolution to recordings is no longer hidden. Sonics are much smoother, just like how good analog should be.

REclock, Regenerate, Repeat the Signal

Re-clocking is beneficial to audio. REclock is a '3-in-1' feature that re-clocks, regenerates, and repeats USB audio datastream. For any and every downstream DAC, REclock technology eliminates jitter. Music flows better, sounding cleaner, deeper, and tighter, just like the real thing.

REbalance and Rectify the Unbalanced Signal

A core element of the original iPurifier's success was Rebalance, which has naturally been carried over to the iPurifier 2. By removing the DC offset and 're-balancing' the USB audio signal, it is now perfectly balanced. As it purifies the USB audio data stream, this means noise is significantly reduced.

Future-Proof Design

iFi Audio develops cutting-edge, advanced audio converters from AMR trickle-down technology. Given this pedigree, the iPurifier 2 (just like the original iPurifier) is ready for all present and future PCM, DSD, and DXD formats without restriction. That means the iPurifier 2 will improve your USB audio playback experience for many years to come.

Product Features

OverviewNoise cancellation for USB connectionsActive Noise Cancellation technologyREclock and Regenerate technologiesRebalance technologyAircraft-grade CNC-aluminum shellReady for all present and future PCM, DSD, and DXD formats without restrictionUSB 3.0 + 2.0 compatible input port, USB2.0 High Speed output portConnectors: iFi ‘FINAL’ USB solid-aluminum connectorsWhat's in the BoxMicro USB cableWarranty CardUser ManualSTS Card

Product Specs

Impedance: 90 ohms) 2.1ADimensions: 2.4" (L) x 0.7" (W) x 0.7" (H)Weight: 0.1 lbs.

Product Manual

iFi iPurifier2 USB Audio Power Filter (PDF Format)

"In my opinion, adding the iPurifier2 into your audio chain is a no-brainer if one desires the absolute best in audio performance. I know what my next purchase is going to be!"- Bansaku, head-fi.org

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