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iFi AC iPurifier - Video Mini Series - The look, the tech, the lowdown. MORE ADDED!

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  1. Dobrescu George
  2. iFi audio
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
    Dobrescu George likes this.
  3. Dobrescu George
    It is quite beautiful in person, and the unboxing feels quite premium for iFi AC iPurifier!

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    Matias likes this.
  4. Matias
    Dobrescu George likes this.
  5. NickedWicked
    Hmm, starting to get impressed by these little things. I know someone in France that sells them so I might as well try 3 of them especially for the price.

    One thing I've been wondering though is if you have 3 of them in your system doesn't that mean 3x the filtering, that do lower the noise significantly but also make the sound softer and less detailed ultimately? There is a thing such as too much filtering after all.
     
  6. Matias
    In my experience, there is no such thing as too much AC filtering. The more the better. Not in a bad way like forward highs that get tiring after a while. Rather tonal balanced filtering that makes the details and micro dynamics stand out because of lower background noise.
     
    Dobrescu George likes this.
  7. Dobrescu George
    This is what I thought as well tho
     
  8. Mediahound
    Here's my video review:

     
  9. PoorAudiophile
    Hi Guys,

    In my previous post I have raised couples of queries as below:

    1) Why there is no perceived improvement on the Block 1? is it because the AC in Hong Kong is cleaner? Or my Power Conditioner is efficient although it is cheap stuff?

    2) In the Block 2, I have plugged the AC iPurifier in the Wall wart. I would like to try to plug it after the Balance Power Supply to see if there is better improvement in the sound. Is it safe to do so?

    3) Does the AC iPurifier need break in time? If yes how long? I recall the iFi iPurifier Spdif needed 3 weeks to shine.

    4) I have plugged the AC iPurifier in all the Wall warts of my apartment, the Polarity LED show red systematically. Hong Kong uses the same plug as UK. My system sounds fantastic to me. Far from being out of phase as the Polarity LED indicated. Should I ask an electrician to rewire the Neutral and the Hot? Will this make the sound improve much better? Or I should just ignore the Polarity LED?


    During the week end, I have experimented further and done some research on the internet.

    I have plugged the AC iPurifier after a Balanced Power Supply. I could not detect any change in to sound. Tried hard with my reference music tracks but could not detect any difference with our without the AC iPurifier. That answers my 2) query.

    I have come across this Eric's blog: http://singaporehifi.blogspot.hk/p/low-cost-free-tweaks.html
    He explained the discrepancy between AC from US and AC from UK/Singapore/Hong Kong.... Therefore if you live in countries that used UK plug, having the Polarity LED of the AC iPurifier flashes RED does not mean your system has polarity issue. So that addresses my query 4).
    The question is if you live in one of those countries and the AC iPurifier LED flashes GREEN? That means a polarity issue?

    My queries 1) and 3) are still left unanswered.

    if no break in time is required, then I can conclude that the AC iPurifier has an epsilonic impact on my system.
    As mentioned everyone will have different results depending on their set-up, gears and country AC. Don't take the improvement for granted.

    I will put mine for sale after just less than one week trial. Unless someone convinces me otherwise.

    Not the topic in this thread but if I was to rank the gears that have a big impact on the sound (priority order):
    1) Room correction
    2) Balanced Power Supply
    provided that you have taken care of other aspects like speakers placement, vibrations, decent interconnect and power cable.

    Enjoy your music everybody.
     
    Dobrescu George likes this.
  10. iFi audio
    Hi there,

    It's difficult to say, system interactions are always complex.

    Yes. The "Earth Fault" or "Polarity Fault" LEDs may light, this merely indicates the wiring does not follow standard mains wiring code.

    Break-in is a debated subject, it would seem that products like the S/PDIF iPurifier and AC iPurifier should be immune to such effects, but just because there is no ready scientific explanation why, we would not exclude it.

    AC phase is defined for all systems. As we do not offer a UK plug version, you are likely using some form of an adapter. You need to make sure this adapter takes phasing into account.

    If the phase is wrong, it means that a wire expected to have no voltage has the full mains and one that is expected to have full mains voltage has none. With some power supply designs this can cause meaningful differences with ground noise, with others it does not.
     
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
    Dobrescu George likes this.
  11. GHoldridge
    So i use ground hog to ground my ican pro but it uses up one of the rca inputs. Is there anyway the AC iPurifier can substitute the ground so I can get my input back? Also the additional cable that plugs into the back where is it?
     
    Last edited: Feb 8, 2018
  12. iFi audio
    To get the input back, please use the 'angled fork' connector that clamps onto the DC plug from the DC power supply.
     
    iFi audio Stay updated on iFi audio at their sponsor page on Head-Fi.
     
    https://www.facebook.com/iFiAudio/ https://twitter.com/ifiaudio https://www.instagram.com/ifiaudio/ https://ifi-audio.com/ info@ifi-audio.com
  13. AudioSpender
    I found the iFi AC to add substantial noise to the line. I tested it with an Entec wideband noise analyzer. I am scratching my head on this one. Why it's adding noise, not taking noise on the line away? I can do a video of the test and upload but not sure of the rules for that.
     
    wakka992 likes this.
  14. wakka992
    Hi AudioSpender,
    don't see why you shouldn't post a video, go for it, it could also help diagnose the problem you're having :beerchug:
    moreover, iFi Audio is not a sponsor here at headfi, so...
     
  15. wakka992
    @iFi audio can you please refute what @AudioSpender said with actual measurements graph of AC iPurifier in action instead of a drawn one?
    It seems strange the result he is measuring with a simple Entec wideband noise analyzer.
    Thanks!
     
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