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"Cleaner, More Distinct"
The iPower is iFi Audio's extremely quiet audiophile replacement DC-power supply that's available in 5V, 9V, 12V, and even 15V versions.
The central characteristic of iFi Audio is its pursuit of the zenith in audio performance: it leaves no stone unturned. The all new iPower is an exemplary example of this. Three years ago, iFi's Ultra-Low Noise AC/DC power adapter underpinned the whole iFi range from the iUSB to the iPhono, leading to their loyal following. Not to rest on its laurels, iFi now has a completely new 'ground-up' DC powered supply. Despite the fact that the iPower's predecessor, the iFi Ultra-Low Noise AC/DC adapter, was exceptionally quiet and elevated the iUSB and iPhono to punch way beyond their respective categories, the all new iPower is even quieter. It's up to 10x quieter, in fact. And that's saying a lot!
"Recordings with open, ambient soundstages sounded cleaner, and both instrumental and vocal music was more distinct," notes Kalman Rubinson at Stereophile.com on his experience using iPower with the miniDSP DAC.
For Virtually Any DC Powered AV Device
The iPower works with virtually any DC powered AV device that uses an outboard power supply, such as the common 'wall wart.' It's simple to use. Just check the correct voltage and order the appropriate model (5V, 9V, 12V, or 15V). Check the correct polarity setup (see below), ensure the current output is sufficient, then plug in and enjoy.
While the majority of home and pro audio products have a 'center positive' DC power connector type, some components use a 'center negative' instead. Correct polarity is crucial to the iPower. If you are unsure of the DC polarity of your product, please check with your vendor. For equipment using a DC power connection, it is common practice to include protection circuitry against over-voltage/reverse polarity, but not every manufacturer will have applied this. Always check first, as AMR/iFi is not responsible for incorrect use or damage arising from use of the iPower.
To use the iPower with 'center negative' components, the iPower comes with a Center Negative Power Adapter.
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.
Ultra-Low Noise Floor
Measured on the Audio Precision 2, the iPower has an astonishingly low audio band noise floor of just 1uV! To put this into context, iFi's very own Ultra-Low Noise AC/DC adapter was in a class of its own at 10uV. Compared to a typical audiophile Linear Power Supply which measured at 20uV, it is demonstrably clear AMR/iFi power supply technology is unparalleled.
12-Element Output Array, 6-Element Input Array
There are two separate but similar 'Array Technologies' used in the iPower. The first is a 12-Element Output Array, which address noise on the output at the DC barrel end. The second is the 6-Element Input Array, which deals with noise at the input at the 2-pin AC mains end, where the until plugs into the wall.
What this means is that any noise is contained and neutralized with the iPower to halt it from contaminating the local mains or audio system. iFi is one of only a handful of companies that manufacture 'battery quiet' DC power supplies. Just like hybrid technology in cars, both have come a long way in a short space of time and are gaining wider acceptance.
Global Adapter Plugs Included
The iPower is light, convenient, and easy to travel with and use in virtually any country in the world. It comes in 5V, 9V ,12V and 15V versions for all manners of DC powered devices and a set of interchangeable pins to span the globe: for USA, UK, EU, and AUS electrical outlets.
Got Raspberry Pi or Similar? Then Order the iPower 5v
The Raspberry Pi, Cubox, BeagleBone, or similar Microcomputer is rapidly becoming the most popular computer server option. So, each iPower (5v version ONLY) ships with the DC > micro USB cable so that the iPOWER (5v) can supply pure, clean power to the microcomputer for the optimal computer audio playback.
"In the case of the miniDSP DAC, the iPower fulfilled iFi's promise. When I switched over from the stock supply, the DAC didn't seem quieter when there was no audio signal, but that's not the real test. Recordings with open, ambient soundstages sounded cleaner, and both instrumental and vocal music was more distinct. This was no major change that struck me every time I listened, but it did make all of my listening much more relaxing—perhaps because, subliminally, it required less effort to attend to individual sounds, particularly those far back on the soundstage."
- Kalman Rubinson, Stereophile.com