I also use a Ross Martin dac, the Super Beast. I suspect at its level of sound quality that only flavor of sound is different than the best you can buy not the quality when driven well. Yes, mine does sound slightly better being driven through an Asus STX coaxial output at 192 kHz I also find that going directly to a power amp (I use XLR cables to my Crown XLS2500 to drive my slightly modified (new tweeters) NHT 3.3's.
I also use Foobar2000 with the native ASIO drivers for the STX audio card and rip all my cd's to a lossless format, usually FLAC Frankly the quality of the recordings is now my main concern and I have started to gather remasters and better originals. Ross Martin dacs, RMA, are excellent and they all use very good op-amps, and components imho. If you don't have a sound card try both the dac's USB and the computers optical audio output if it has one and let your ears decide.
I also use Foobar2000 with the native ASIO drivers for the STX audio card and rip all my cd's to a lossless format, usually FLAC Frankly the quality of the recordings is now my main concern and I have started to gather remasters and better originals. Ross Martin dacs, RMA, are excellent and they all use very good op-amps, and components imho. If you don't have a sound card try both the dac's USB and the computers optical audio output if it has one and let your ears decide.