DC iPurifier2 | DC Output


IFi DC iPurifier2

Is underlying system noise polluting your enjoyment of music?

The iFi audio DC iPurifier2 will reduce interference in your system, often caused by noisy power supplies.


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Unwanted noise. Gone. Banner
Unwanted noise. Gone.

Your everyday Switch Mode Power Supplies (SMPS)are very noisy. They were never really intended for audio use.

  • Switch Mode Power Supplies (SMPS)A switched-mode power supply is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. It transfers power from a DC or AC source to DC loads, such as a personal computer, while converting voltage and current characteristics.
    Switch-mode power supplies are widely used because of the advantages they offer in terms of size, weight, cost, efficiency and overall performance. They are in themselves noisy and were not designed with audio in mind.

The DC iPurifier2, just like its predecessor, combats unwanted noise coming from SMPS to ensure the pure sound of your audio wins through.

Handles anything

Handles anything

Simply place the DC iPurifier2 between the SMPS and the device you want to use.

Your device could be anything from a DAC (digital-to-analogue converter) to a DAW (digital audio workstation)

The DC iPurifier2 will halt unnecessary noise in its tracks.

Take a look at our Noisebusting Tech Note here.

  • DAC (digital-to-analogue converter)DACs convert digital information, stored or streamed by computers, into music we can hear through speakers or headphones.
    Every device that’s a source of digital sound has a built-in DAC (TVs, games consoles, CD players, phones, portable music players etc). Dedicated external DACs sound much better than standard DACs used in digital devices such as phones.
  • DAW (digital audio workstation)A digital audio workstation (DAW) is an electronic device or application used for recording, editing and producing audio files. It’s basically a mixing desk.
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So, what’s new?

So, what’s new?

The DC iPurifier2 uses iFi’s optimised Active Noise Cancellation2 technology based on the ingenious Thales Spectra military radar defence technology used in jet fighters.

  • Active Noise CancellationActive Noise Cancellation (ANC) reduces unwanted sound by the addition of a second sound wave specifically designed to cancel out the first. This basically results in no sound at all as it reaches unwanted sound even at the lowest frequencies.
    Passive noise cancellation is done by means of insulating filters and works best on the middle to high frequencies. It does not work on the lower frequencies meaning that some sound can still be heard.

In the immortal words of Maverick from Top Gun, “Maverick going supersonic. Be there in 30 seconds!”

The devil is in the detail
 Active Noise Cancellation II®

Active Noise Cancellation II®

Based on military tech, our improvedActive Noise Cancellation II® actively cancels all incoming noise.

It does this in a similar way to active noise-cancelling headphones – it generates a signal identical to that of the incoming electrical noise but in the opposite phase, actively cancelling it out. It's an ultra-wide band design that is effective from 1Hz all the way up to 5GHz. Its strongest performance is in the audible range of 20Hz to 20KHz.This combination is measurably more effective at eradicating noise corrupting the USB signal than devices relying solely on passive filtering.

The unit comes with different types

The unit comes with different types

The unit comes with different types of DC barrel connectors.

It works with 5.5 x 2.1mm but also ships with adapters for 5.5 × 2.5mm and 3.5 × 1.35mm.

Vishay MELF resistors – complex, costly but superior

Vishay MELF resistors – complex, costly but superior

These metal electrode leadless face resistors have excellent accuracy, stability, reliability, and pulse load capability. They provide optimal power rating and pulse load capability. They show some of the lowest noise and distortion of any resistor available in the market, period.

This excellent copper-alloy EMI

This excellent copper-alloy EMI

This excellent copper-alloy EMI shielding isolates devices and cables to block radio frequency electromagnetic radiation.

  • EMI(Electromagnetic Interference)EMI is a type of interference caused by errant and unwanted electromagnetic waves that are received and amplified by an audio system. They cause some of the annoying ‘audio gremlins’ we often talk about.
A plethora of top-notch components

A plethora of top-notch components

A plethora of top-notch components – high-precision MELF resistors, Panasonic SP-Cap polymer aluminium capacitors, custom operational amps plus copper-alloy shielding.

ultra-wide bandwidth design

ultra-wide bandwidth design

It is a ground-up, ultra-wide bandwidth design.

It is effective from 1Hz all the way up to 5GHz.. Crucially the strongest performance is in the audible range of 20Hz to 20KHz.

reverse polarity warning

reverse polarity warning

This device has a built-in reverse polarity warning.

  • polarityIn simple terms, polarity refers to the way a signal flows.
    Audio signals generally flow one way, like DC current, and have positive polarity. Inverting the polarity can have a negative impact on sound and equipment.

The red protection LED will be lit if the input polarity is reversed. You can be sure your system is safe!

One small device, many, many applications

One small device, many, many applications

One small device, many, many applications – noise reduction for 5v -24v SMPS.

Just add between the SMPS and the device, for example, a router, DAC, set-top box, media streamer, laptop or desk mixer.

Noise will be reduced by a factor of 316x to 100,000x.

Compatibility5-24 volt DC power supply units (up to 3.5A, 84W)
ConstructioniFi ‘FINAL’ aircraft-grade RFI shielded aluminium chassis
DC barrel versions5.5×2.1mm (adapters for 5.5×2.5mm and 3.5×1.35mm included)
Polarity inverter (white)
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