I've had the AK100 (stock) for more than half a year. I used it mainly for work and on the go with my IEMS.
It is amazing with Westone 4s IEMs, especially with 24/96 and 24/192 FLAC files.
I had a question though. Two actually!
I am currently using it as part of a home setup. Digital out from my PC -> AK100 -> Headphone amp (Woo audio WA6) -> HD650s.
1. Whenever I have the USB cable connected to keep it charged (the one that came with the AK100), I hear a hiss when running my HD650s out of my WA6 amp. As soon as I disconnect the USB cable, the hiss totally disappears. Any clues to make the hiss go away when connected via USB?
2. I can't seem to enable 24/192 in Windows 7 when my AK100 is connected via the digital cable. 24/96 works fine but 24/192 creates static. I am assuming it is my motherboard's digital out that might be causing the problem. Perhaps I should update the firmware and see if I connected my AK100 via USB to treat it as a USB DAC?
Any suggestions would be greatly appreciated!
Edit: When I connect my headphones directly into the AK100 (no amp), there is no hiss when the USB cable is connected to the AK100. But with the amp and USB cable connected to the AK100 (hooked to the amp via RCA cable), the hiss is there. Pretty annoying, but the hiss disappears when the AK100 is hooked up via USB.
Edited by amdj - 1/7/14 at 10:32pm