DC iPurifier2
DC iPurifier2
Ifi Audio 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.

Unwanted noise. Gone.

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

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

iFi audio DC iPurifier2

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.

Super effective. Super cool.

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.

The DC iPurifier2 handles five volts right through to 24, and comes with a variety of adapter sizes making it compatible with all power supplies – 5.5 x 2.1mm, 5 x 2.5mm, and 3.5 x 1.35mm.

iFi audio DC iPurifier2

So, what’s new?

The DC iPurifier2 uses iFi’s optimised Active Noise Cancelation2 technology based on the ingenious Thales Spectra military radar defence technology used in jet fighters.

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

The devil is in the detail

Only top notch components are used in our tech. The details speak for themselves.

Adding the DC iPurifier2 into your system will not only reduce background noise, it will bring out more definition, detail and warmth in your music.

‘The Danger Zone’ by Kenny Loggins will never have sounded so clear.

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.

This device has a built-in reverse polarity warning.

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

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.

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

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

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. Nothing else comes close.

iFi audio DC iPurifier2

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.

Based on military tech, our improved Active 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. This is highly effective at removing low- and mid-frequency noise, while passive insulating filters deal with higher frequency interference. This combination is measurably more effective at eradicating noise corrupting the USB signal than devices relying solely on passive filtering.

It reduces the noise floor by > 40dB (> 100x).

Support

  • Compatible with 5-24 volt DC power supply units (up to 3.5A, 84W)
  • Construction: iFi ‘FINAL’ aircraft-grade RFI shielded aluminium chassis
  • With 3 DC barrel versions: 5.5×2.1mm (adapters for 5.5×2.5mm and 3.5×1.35mm included)
  • With polarity inverter (white)
  • Warranty period: 12 months

Reviews

This makes devices costing hundreds sound like they cost thousands!

Cleaned up the DC power to a Silent Angel Ethernet switch driving my Roku Ultra tv box. I was expecting only subtle improvement at best but got more than that. Movie scenes now sound more like I’m there and less like a recording. I have a second iPurifier2 I will use on the Roku when I find adapter plugs that fit it; the included adapters do not.

(Click name to read original review)

Compare

iPowerDC iPurifier2
Primary useUpgrade any noisy SMPSIn-line upgrade of linear/SMPS power supply
InputYes-
Output5V/2.5A; 9V/2.0A; 12V/1.8A; 15V/1.2A
5.5×2.1mm input/5.5×2.5mm output (‘C’ black)
5.5×2.1mm input/4.8×1.7mm output (‘F’ black)
5.5×2.1mm input/4.0×1.7mm output (‘G’ black)
5.5×2.1mm input/3.5×1.35mm output (‘H’ black)
5.5×2.1mm right-angled extension cable.
5.5×2.1mm input / 5.5×2.5mm output; Reverse Polarity
Plug (‘C’ white)
-
5v version onlyDC > micro USB cable (for Raspberry Pi or similar micro
computers)
-
Compatible with-5-24v DC (up to 3.5A, 84W)
Input/Output-5.5 x 2.1mm
(adapters for 5.5×2.5mm and 3.5×3.5×1.35mm
included)
Active Noise CancellationYes-
Active Noise Cancellation2-Yes
Noise1uV-
Noise reduction-Up to 100,000x
Total length82x43x40mm
Weight155g (with cable)
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.

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.

Active Noise Cancellation

Active 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.

Polarity

In 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.

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.

Pulse Load

A ‘load’ refers to a current drain that is applied to a battery. For example, charging the flash in a camera. The term ‘Pulse Load’ indicates that the load is automatically applied for a specific period of time, then disconnected without user intervention.

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