[moriez]

Did anyone notice an actual reduction or complete cancellation of interference? Specifically when wearing headphones and moving the USB mouse I can hear this noise that made me move away from an internal to external DAC in the first place. I expected better results.

 

[roamling]

  Did anyone notice an actual reduction or complete cancellation of interference? Specifically when wearing headphones and moving the USB mouse I can hear this noise that made me move away from an internal to external DAC in the first place. I expected better results.

what in the world are you talking about?

 

[doctorcilantro]

   
Hi,
 
We do not recommend that you do not buy anything yet. You need to identify where the ground-loop comes from first.
 
From afar, it sounds like your computer setup has one earth and the WA6 another. You need to track this down and confirm and then remove one earth.
 
Cheers.

You can get that packet noise and ground loop embedded in the data line, not just 5v, so essentially these fancy tweaks are moot at times unless you go whole hog. iFi's larger USB is galvanically isolated but the Purifer isn't I assume.
 
That's why I went with the Adnaco. I could still here the ground loop with my regen in place, never tried the AQ "in front" though - it's after the Adnaco hub along with Regen.

 

[jermaink]

  Did anyone notice an actual reduction or complete cancellation of interference? Specifically when wearing headphones and moving the USB mouse I can hear this noise that made me move away from an internal to external DAC in the first place. I expected better results.

For my setup using an iFi iUSB helped reduce ground loop noise I was noticing. It didn't eliminate all of it, but probably 70% of it. Considering getting another one (or iUSB 3) to run in series. When I can afford to..

 

[iFi audio]

  Did anyone notice an actual reduction or complete cancellation of interference? Specifically when wearing headphones and moving the USB mouse I can hear this noise that made me move away from an internal to external DAC in the first place. I expected better results.

 
Hi,
 
There are way too many sources of interference. You are best opening a support ticket so the techies can troubleshoot with you. As they will ask you to "test this" and "test that."
 
Cheers.

 

[crossbone]

Hi,
 
my current setup is connected like this:
 
Onboard Intel Chipset USB 2.0 -> USB 2.0 Cable (fairly high-quality) -> USB 2.0 DAC
 
How should the iPurifier2 best be connected?
 
Onboard Intel Chipset USB 2.0 -> USB 2.0 Cable (fairly high-quality) -> iPurifier2 ->  USB 2.0 DAC
Onboard Intel Chipset USB 2.0 -> USB 3.0 Cable (standard quality) -> iPurifier2 ->  USB 2.0 DAC
Onboard ASMedia USB 3.0 -> USB 3.0 Cable -> iPurifier2 ->  USB 2.0 DAC
 
Or should i get an USB-Extension Card with a NEC Chipset:
Extension NEC USB 3.0 -> USB 3.0 Cable -> iPurifier2 ->  USB 2.0 DAC
 
Really confused because I remember some years ago most people were of the opinion that no DAC should be used on a USB 3.0 Port.
 
Cheers

 

[Dadracer]

I would say your first option, but I am not an expert and in any event you can and should try the options and find which you think sounds best. 

 

[iFi audio]

  Hi,
 
my current setup is connected like this:
 
Onboard Intel Chipset USB 2.0 -> USB 2.0 Cable (fairly high-quality) -> USB 2.0 DAC
 
How should the iPurifier2 best be connected?
 
Onboard Intel Chipset USB 2.0 -> USB 2.0 Cable (fairly high-quality) -> iPurifier2 ->  USB 2.0 DAC
Onboard Intel Chipset USB 2.0 -> USB 3.0 Cable (standard quality) -> iPurifier2 ->  USB 2.0 DAC
Onboard ASMedia USB 3.0 -> USB 3.0 Cable -> iPurifier2 ->  USB 2.0 DAC
 
Or should i get an USB-Extension Card with a NEC Chipset:
Extension NEC USB 3.0 -> USB 3.0 Cable -> iPurifier2 ->  USB 2.0 DAC
 
Really confused because I remember some years ago most people were of the opinion that no DAC should be used on a USB 3.0 Port.
 
Cheers

 
Hi,
 
We suggest you use either USB2.0 or USB3.0 Ports, if your DAC is compatible with USB3.0 Ports. In this case a good grade commercial USB 2.0 or USB 3.0 cable is recommended. USB 3.0 may offer better power quality and allows the attached DAC to draw more power safely. If the DAC cannot work with USB 3.0 Ports, just use USB 2.0. But for sure, USB3.0 ports are fine for DACs.
 
For the technical background; www.usb.org   as they publish the specification for the USB standard. We use this as the starting point - highly recommended reading.

 

[JeanPhi]

  Did anyone notice an actual reduction or complete cancellation of interference? Specifically when wearing headphones and moving the USB mouse I can hear this noise that made me move away from an internal to external DAC in the first place. I expected better results.

 
I have the same issue, I can hear the "computer activity". Moving mouse also creates noise. I'm considering getting an iPurifier2 for that.
 
Do you mean that your iPurifier2 does not remove the mouse noise at all?

 

[moriez]

  Do you mean that your iPurifier2 does not remove the mouse noise at all?

 
In my case it did not remove enough of the noise interference. Only very very slightly and as this was the most important objective I returned it. My solution: go optical

 

[JeanPhi]

   
In my case it did not remove enough of the noise interference. Only very very slightly and as this was the most important objective I returned it. My solution: go optical

 
In my case the noise is not so strong but very noticeable when there is no music. I also considered a full galvanic isolation (http://intona.eu/en/products), or maybe the Corning USB3 Optical Cable (ACS2CVA010M20) but I'm not too sure it would work with the DAC.

 

[JeanPhi]

   
In my case it did not remove enough of the noise interference. Only very very slightly and as this was the most important objective I returned it. My solution: go optical

 
Too bad! Do you have a product in mind? I searched and found few solutions, a full galvanic isolation (Intona) and an optical cable (Corning). The galvanic solution is not cheap and the corning optical cable delivers limited and unfiltered power (so it may not work or also forwards power noise).
 
PS: Just to be sure, was it the second version (iPurifier 2) or the first one (iPurifier)?

 

[moriez]

I tried the iP2.
 
My computer motherboard ASRock Z77 Extreme4 has an optical out which connects the Gungnir with an AudioQuest Forest cable. Not exactly quality material but it certainly gets the job of noise elimination done. I'm not convinced and haven't distinguished that optical is inferior to USB with regard to jitter levels so in my situation I don't have direct need for something like the Intona. It seems a very nice up to the task device from what I've read.
 
For the sake of experiment my next move is getting a M2Tech hiFace Two USB>BNC to directly connect to the Gungnir.

 

[gr8soundz]

iPurifier2 has no separate power feed so that noise may still be getting through.
 
Think the iUSB3.0 might be a better solution. Costs a lot more but is designed to clean up data and power noise over usb.
 

 

[theveterans]

  iPurifier2 has no separate power feed so that noise may still be getting through.
 
Think the iUSB3.0 might be a better solution. Costs a lot more but is designed to clean up data and power noise over usb.
 

 
I went straight to this setup along with the iFi Gemini cable (1.5 m). It noticeably increased (maybe maximized to the DAC's specs) the dynamic range. All details, instrument placement and soundstage are better focused. Plus I can plug it in any of the USB ports without a difference in sound unlike the USB straight to the DAC solution.