Does not work on Focusrite audio cards. Looks like 200mA is not enough to power up any card with mic ins and headphone preamps via USB. Hifimediy reply: Yes it generally doesn't work with sound cards that has mic inputs (phantom power) etc. We'll add a note about saying that Focusrite is not supported. You can always ask us for an opinion on if it works with your device before ordering.
I have a Raspberry Pi B Version 2 and am able to get a HiFimeDIY Sabre U2 Asynchronous USB DAC working with it. The only mod is to prioritise USB audio over HDMI and analogue.
I also obtained the HiFimeDIY USB Isolator, but when this is installed inline, the RPi is unable to identify the DAC at boot up. This is not a show stopper, as the DAC is working fine and I am not experiencing any white noise with it. This DAC is only designed to go to 96khz, and I am satisfied with that.
If you have a dying motherboard and can literally hear the hiss/fuzz difference between different USB ports, then this is for you
Does as advertised
I did a blind test with someone who bought it, along with the Sabre U2 DAC:
I prefer the sound without isolator than with it.
With the isolator it seems to me that sound lacks power, especially with the low frequencies. This is subjective but done in blind test with consistent results.
Maybe the isolator limits the current available to the DAC? (thus the lack of power in sound) Or that isolator could be defective.
Could someone try this blind test with someone else who plug and unplug the isolator between the DAC and the PC ?
I had noise issues coming from my desktop PC USB ports. All of them. I was happy to find that my audio interface needed less than 200mA (it needs 150mA) so I decided to try this USB isolator. It works marvellously! I hear absolutely no noise. Even with my unplugged laptop I would get some noise but with this little device my audio is as crisp as can be with any computer I've tried it with. I'm so glad it solved my issues without shelling out legit cheddar on an industrial isolator.