I highly recommend the addition of a USB isolation board and power supply. This opens up the sound considerably and is another worthy purchase. I use these:
with the upgraded Cardas cable:
Hello, so glad you posted this. I have a question for you. The buffer power board runs on 8-15 VDC. Do you think that there would be any advantage to using a 12V sealed lead acid battery to power the buffer (over the power supply you listed here)? I'm guessing that having a power source that is pure DC should be an improvement over having a rectified AC source. There's no 60 Hz buzz to filter out. Thanks in advance for your consideration.
Wow. I never knew such a product exists.
I am actually looking for this. Cos from RMAA result, there are 50Hz noise which I believe came from the power adaptor of the USB hub. See below:
Edited by kierai - 5/2/14 at 5:26pm