Thanks for the input, I was worried I'd need to buy a more robust DAC to properly supply a tube amp down the road.
I'm still just a bit confused about the best way to keep the D12 plugged in. I've looked at several of the amp manuals and a few of them state to make sure to keep the switch in the off position to maintain battery life. When I do have the switch to off and the usb power adapter is plugged in am I discharging battery still? I'm a bit confused and concerned I'll damage the amp if I don't set it up right. I still can't get over all the little extra's ibasso threw in and am reading up on opamp rolling