So, the mailman just delivered my D100 an hour or so ago.
I was actually going to get the TubeDAC-11 suggested to me by Project86, but as I was searching on eBay I noticed a local seller with a used D100 for sale at a relatively cheap price, so I figured I might as well try it out.
I found an old adapter and plugged in my JH16s. It all sounded pretty sweet untill 2 minutes in when it suddenly jumped ALOT in volume and more or less killed my ears, then it started with that scratchy sound that you got on old TV's when nothing was on at night. Then it returned to low volume, and the process started all over.
I've tried both the "Low" and "High" headphone sockets as well as trying with 2 different adapters.
Any clues as to what could be wrong? It's plugged in via USB.
Additional info: Using an onboard soundcard at 2% or so volume and the D100 at 1-2 ticks above zero. (Seems I should be able to control the volume better than this, but it goes loud really fast?)
My motherboard is a Gigabyte 55A-UD3, not sure about the "sound card".