nano – iUSB3.0

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Jitter be gone

Military radar tech
for audio

0.5uV (or 0.0000005V)
noise floor

Silver bullet
for USB gremlins

Since its introduction in 2012, the original micro iUSB changed what was considered attainable from computer audio by supplying regenerated USB power. The recently launched flagship micro iUSB3.0 aimed at top-tier dacs (+$5000), is another leap for computer audio.

The all-new nano iUSB3.0 is the ‘Baby Bentley’ of the flagship micro iUSB3.0. For $500 to $5000 dacs, it retains the lion’s share of the micro iUSB3.0’s features – USB3.0 chipset at the heart, IsoPort®, Active Noise Cancellation®, REgenerate/REclock/REbalance® and more.

nano iUSB3-01.45

Exclusive AMR trickle-down technology

nano iUSB3-07.71

The all-new nano iUSB3.0 features all-original, cutting-edge USB audio technology including Active Noise Cancellation® from AMR. The latest REclock®; REbalance® work their magic while the original REgenerate® which was at the heart of the success of its predecessor. All combined the nano iUSB3.0 has some serious USB technology.

Fed by the iPOWER, the noise floor of the nano iUSB3.0 at 0.5uV (or 0.0000005V) is only bettered by the flagship micro iUSB3.0.

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.


An air defence radar is transmitting 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, it completely cancels all the incoming noise. ANC® is the perfect ‘antidote’ for power supply noise; 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.

The background and inner resolution to recordings is no longer hidden. Sonics are much smoother, just like how good analogue should be.

A whole new signal: REclock® /REgenerate®


The nano iUSB 3.0 re-clocks/re-generates/repeats USB audio datastream. For any and every downstream DAC, REgenerate® actually ‘regenerates’ an all-new USB signal via a precision master clock with the REclock® technology to eliminate computer jitter. Music just flows better; is cleaner, more accurate, just like the real thing.

Recover the unbalanced USB signal: REbalance®


The USB signal is inherently a ‘balanced’ signal, however most USB signals become ‘unbalanced’ to some degree and contaminated by noise. By removing the DC offset and ‘re-balancing’ the USB audio signal, it is now perfectly balanced and noise-free.

The graph on the left shows a typical USB signal that is poor. Virtually everything about the signal is out of kilter. The graph on the right shows how EACH different feature of the iUSB3.0 corrects the USB audio signal. All combined, the signal is brought back to a near ‘perfect’ form. This shows the importance of having each and every REclock®/REgenerate®/REbalance® feature to fully restore the eye pattern.

Eye Pattern_Ver.9

The future is here: USB3.0® ultra-speed 5.0 Gbps


iFi products are at the cutting-edge yet also look to the future. The nano iUSB3.0 is USB3.0 standard and is backwards compatible with USB2.0. There is also the added sonic benefit from the USB3.0 platform which mandates better connectors, higher-quality cables etc. Looking ahead, as audio transmission standards improve, with an ultra-speed bandwidth of 5.0Gbps, USB3.0 is future-proofed. It is 10x that of 480Mbps on USB2.0.

USB Power ‘On’ for less stress

Unless the normal power up/down sequence is followed, the computer may ‘lose’ the DAC connection. The nano iUSB3.0 has an ‘Auto/On’ switch where the ‘On’ setting ensures USB power is constantly supplied to the PC so it always ‘sees’ the DAC to enhance user enjoyment.

USB Dual-Ports® for Gemini Dual-Headed cable


Retaining the Dual-Port topology, the nano iUSB3.0 operates as a computer audiophile-grade USB power supply. The data and power lines are totally separate which eliminates any cross contamination.


With modern power-hungry devices, the nano iUSB3.0 is also Bus Charge 1.2 compliant – able to fast-charge phones, tablets and even its siblings, the nano iDSD and micro iDSD.

For further reading on the nano iUSB3.0 and technical aspects on other iFi products:


Output Voltage: 5V±0.5%
Output Current: 2.1A
Noise floor: 0.5uV(0.0000005V)
USB 3.0: Ultra-speed 5.0Gbps
Input Voltage: AC 100 – 240V, 50/60Hz (iFi iPower included)
Power consumption: < 15W (includes powered USB device)
Dimensions: 106(l)x67(w)x28(h)mm
Weight: 141g (0.31 lbs)
Warranty period: 12 months
Specifications are subject to change without notice.

User Manual

Technology micro
1-1 USB3.0 Chipset
Improved performance and fault tolerance over USB2.0.
Side Bar 1: USB3.0 chipsets
0-1 0-1 USB2.0
2-1 REclock®/REgenerate®/Rebalance®
Re-clocks/Re-generates/Re-balances USB signal, recreates a ‘perfect’ USB signal.
Side Bar 2: USB Audio Class 2.0 (UAC2)
0-1 0-1 0-1
3-1 Low Jitter Crystal Clock Oscillator
True crystal clock for ultra-low Jitter in the all-important ‘audio band.’
Side Bar 3: True Crystal Clocks
0-1 0-1 0-1
4-1 PowerStation+®
USB Power Supply as quiet as battery: 3-Stage Sub-sonic noise filters + 3-Stage 6th Order RFI
noise filter.
0-1 0-2 0-2
5-1 PowerStation®
USB Power Supply line for super low-noise: Sub-sonic noise filter + 2-Stage 4th Order RFI noise
0-2 0-1 0-2
6-1 Active Noise Cancellation+®
Extremely low noise floor (0.1uV) ANC+ circuit, lower noise than batteries.
Side Bar 4: Active Noise Cancellation
0-1 0-2 0-2
7-1 Active Noise Cancellation®
Very low noise floor (0.5uV) ANC circuit, comparable to batteries.
Side Bar 4: Active Noise Cancellation
0-2 0-1 0-1
8-1 IsoGround®
Eliminates Ground/Earth loops, reduces RF noise.
0-1 RF only RF only
9-1 Dual-USB Output Ports
Separate USB Port for Power only (allows use of dual-headed USB cable).
2 sets 1 set 0-2
10-1 Auto USB Power
USB Power Always ON or follow the status of the computer.
0-1 0-1 0-2
11-1 RapidCharge (BC1.2)
Super-fast USB charging.

Side Bar 1: USB3.0 chipsets

USB3.0 chipsets are markedly superior to USB2.0 chipsets. This is in part due to improved IC construction processes that are needed to support the data rate of USB 3.0 which at 5GBPS, is 10x that of USB 2.0.

Side Bar 2: USB Audio Class 2.0

USB Audio Class 2.0 Devices are especially sensitive to data quality issues. Computer hard-disks work in ‘Bulk Mode’ which allows corrupt data to be re-sent and is extremely robust in terms of data integrity.
Audio/Video streaming requires real-time operation and hence no data can be re-sent even if corrupted. Further, the timing accuracy required is also much stringent than in ‘Bulk Mode.’

Side Bar 3: True Crystal Clocks

True crystal clocks with a clean power supply offer around 100 femtoseconds jitter in the all-important audio band (20Hz-20kHz).
By comparison a SONET-derived Femto-Clock (US$50), has around 500 Femtoseconds jitter in this audio band.

Side Bar 4: Active Noise Cancellation

Active Noise Cancellation generates an opposite phase signal to the noise to cancel it. Due to its operation it also stops noise from the device being reverse-injected into the power supply or computer.


iUSB Comparison

nano iUSB3.0
Mr. Hakan Cezayirli’s Stereo Mecmuasi reviewed iDAC2 + nano iUSB 3.0 and gemini cable!
Nano iUSB 3.0: “Carrying the similar technologies with the big brother, if you wanna go one step further, this is it. DSD 256 playback iDac2 + Nano iUSB3.0 amazing.”

Hakancez of blogs about the iUSB3.0 nano!
“This time the product was installed inside a smaller chassis Nano iusb3.0 we look at the model. Nano iusb3.0 that can infect your just like big brother from the USB port music system has been developed to avoid the noise of any kind. if the first one of the newest members of consumers served filtering system in 2012 by Audio. Just like the big brother ısoport Active Noise Cancellation (ANC), regenerate / ReClock / it contains rebalance technologies. A glance let the initial design of the device before, we will look closely at the back of technology…….”

Translated with Google

Much appreciated Hakancez of!

iFi Designers and the iUSB3.0 featured in Gekkan Stereo (Monthly Stereo) articles!
Thank you Gekkan Stereo and Top Wing (iFi:Japan)


iUSB3.0 Micro ain’t no FOOL! Mr.T reviews iFi!
“We reviewed the original iUSBPower by iFi Audio about two years ago and found it immensely useful for people who wanted clean power for their USB DACs — especially those powered solely by USB power……Two years later, the iUSB 3.0 is iFi Audio‘s futureproofed clean power solution……For the time being, however, the iUSB 3.0 is already beyond sufficient for the way 99.9% of all USB DACs are connected (via USB 2.0). If you need to connect to two devices simultaneously, the iUSB 3.0 is the clean power module for you.”

Thanks Mr.T !

Don’t Stop Believin’ in the DC iPurifier!
“How to use iPurifier DC is easy, just connect between the DC power supply equipment and power supply adapter. This alone caused the signal of the noise signal and the reverse phase for us to remove the noise…….Husky voice of Steve Perry in the “Don’t Stop Believin” becomes smooth disappear incidental sound, will improve the overall roughness. “Waltz for Debby” is obviously an increase in the number of environmental sound echoing in the concert hall, the better the separation of each instrument. In particular, drum and base of the left channel is now divided to listen properly to bass.”

Thank you Tamagawa Audio and Top Wing Coporation (iFi:Japan)!

Translated with Google

iUSB3.0 Nano: “sound quality improvement effect is high” says Hisaaki of Phileweb!
“Such as noise reduction of the power supply line, will contribute greatly to the improvement of the USB environment new product “nano iUSB3.0” British iFI-Audio is connected between the PC and the USB-DAC, power supply to regenerate the USB power…..I tried the machine at home listening room. The Diana Krall, listen to one to increase the sense of depth of the entire music, sound image is localized in the realistic and sharp. In UNAMAS “Art of the Fugue”, and further stand out tone of beautiful stringed instrument, the sound quality improvement effect is high. The company’s and “iPurifier DC” Together we set the Pre Release of “GEMINI & Mercury” cable, likely able to build more powerful USB environment.”

Thank you Hisaaki Hijikata and Phileweb!

Translated with Google

Enjoy The Music blogs about the iUSB3.0 Nano!
“iFi Audio’s new Nano iUSB3.0 ($199) continues the company’s trickle-down technology from their higher end product line. The original micro iUSB changed what was considered attainable from computer audio by supplying regenerated USB power. The iFi Audio Nano iUSB3.0 retains the lion’s share of the micro iUSB3.0’s features – USB3.0 chipset at the heart, IsoPort, Active Noise Cancellation, REgenerate, REclock, REbalance and more. This cutting-edge USB audio technology with Active Noise Cancellation from AMR with the latest REclock and REbalance work their aural magic. When fed by iFi Audio’s iPOWER, the noise floor of the Nano iUSB3.0 at 0.5uV (or 0.0000005V) is only bettered by the flagship micro iUSB3.0.”

Thanks Enjoy The Music!

nano iUSB3.0 main accessories
• 3.5mm rubber feet
• USB A male>B male Cable
• USB > DC cable
• Adapter for iPower
• iPower
• user manual
• Warranty Card
• STS Card