I recently purchased the K712s (about a couple of months ago) and bought a Schiit Vali to go along with them. I loved the pairing at first but now, for some reason, the Vali seems to make the K712s sound kind of muffled. I'm not really sure exactly how to describe the way they sound but they seem to lose some detail when I use the Vali.
Anyways, I'm looking to upgrade. Right now I'm using a Sound Blaster Omni along with the Vali for gaming purposes. I'm not sure if such a thing exists, but I would like to find an amp/DAC that pairs well with the K712s, is under $300, has an optical input for the DAC and also has an RCA input for just using the amp. Both optical and RCA are preferred because my SB Omni has an optical out and I also want to use it with my Astro Mixamp for gaming on console.
I've searched for such a thing for a while and can't seem to find anything. Any help would be greatly appreciated.