AC iPurifier - now this is getting interesting

[One and a half]

The Japanese are willing to leak something, well let us know about things.

 

Phile Web has posted an AC iPurifier that was shown at Munich hi-end...c'mon people that went there, you not see this??

 

Quote via Google Translate 

One is "AC iPurifier". This is the application of the DC iPurifier technology which recorded the biggest selling soon after the release to the AC power supply, and it becomes the first AC power related accessory as iFi-Audio. 
It is planned that the original technology of iFI-Audio including active noise cancellation will be installed in the interior and it is currently under development. The appearance is prototype, it is planned to adopt aluminum body in the future. 

 

 

If ifi use their active noise technology applied to the AC Mains for audio use, it hopefully will reduce the AC crud fed into low level signal devices such as DACs and really hoping for enough grunt to combat media server pulsed AC wave forms. Now active cancellation circuitry depends on detecting the crud to begin with and then to counteract and here's the rub. There's no free lunch here, cancellation circuitry is nearly perfect, which isn't too bad, but it does give off heat. Not like a toaster, but enough to be of a concern.

The device would be inline with the device you wish to filter. It can't block what's incoming, as the impedance on the network is rather low, but certainly for its size work on the smaller load side. 

 

Let's see in the coming months the discussion on this rather important audio device which has no connection to the audio signal itself  

 

 

[Middy]

I wonder if this will remove noise going back into the mains as well.. Not sure what's possible with AC mains devices. Is HF noise as well as LF noise removed ?Reduced...

Expecting big things from the IFI engineers.. No pressure .

Good luck

 

and thanks for the great early heads up

@One and a half

[One and a half]

23 hours ago, Middy said:

I wonder if this will remove noise going back into the mains as well.. Not sure what's possible with AC mains devices. Is HF noise as well as LF noise removed ?Reduced...

Expecting big things from the IFI engineers.. No pressure .

Good luck

 

and thanks for the great early heads up

@One and a half

The classic approach to filtering is detection and correction.  Unlike the leakage currents from audio devices, mains contaminants have considerable strength. More contaminant voltages, the more power and developed heat is a by product. 

Looking at the size of the iFi unit there's room for line filters as well as filters for higher frequencies. 

Hopefully it differs from the Harvester which either works with incremental or no improvement. 

 

There's a limit as to how much and what type of frequency that is allowed past the gate. I would be happy with the higher than mains frequencies, say 100kHz upwards since these frequencies can attach themselves to anything and can propagate via very small capacitances.

 

For small signal gear lower mains harmonics may not cause that many problems,  these affect power amps or are in fact created by them.

[Middy]

Thank you for the insight one and a half.

I have spent a fair amount trying to improve the sound of my Amp DAC with power upgrades. Filters / DC Blocker/ Balanced isolation transformer/ Sinewave generator.. LPS/ with a DC purifier at the end 

If IFI do thier normal magic with this and maybe more including thier Anti phase cancelling tech. This will be another winner for them. 

A pass through plug would seem thier normal raison detre into the back of a unit. 

The plug filters I tried are mainly a small simple board with lots of space around them. A bit more bulk maybe is the only way or some clever heat dissipation design with an isolated metal shell.

I wish IFI luck and any insight from them is always welcome.

Yours also 1 1/2 

Thank you 

Dave

 

 

 

[Middy]

I don't know if you find this interesting or a little basic but some more technical thoughts here.

http://www.audiomisc.co.uk/mains/filters1.html

 

A bit more my basic level of Electrickory if people want to read.

http://www.murata.com/en-eu/products/emc/emifil/knowhow/basic/chapter01-p1

Hope it helps

 

Dave

[Cornan]

Maybe it is time to wake-up this thread? It looks like the iFi AC iPurifier was just launched here in Sweden today.

Looks like a combination of Oehlbach Phaser, IsoTek Isoplug and JSGT in a single pakage! Interesting though!  

 

https://ifi-audio.com/portfolio-view/accessory-ac-ipurifier/

 

Anyone who had the chance to try it?

[AMR/iFi audio]

On 22.12.2017 at 11:32 AM, Cornan said:

Maybe it is time to wake-up this thread? It looks like the iFi AC iPurifier was just launched here in Sweden today.

Looks like a combination of Oehlbach Phaser, IsoTek Isoplug and JSGT in a single pakage! Interesting though!  

 

https://ifi-audio.com/portfolio-view/accessory-ac-ipurifier/

 

Anyone who had the chance to try it?

 

Here's the original thread:

 

 

The product is quite new, yet shortly aftyer holiday some feedback should be in the web.