Benchmark DAC1 vs Musichall Dac 25.3 : A/B test

I A/B’d these two dacs today (based on my ears and nothing particularly empirical). I’m not sure how relevant this will be as the Benchmark dac1 was released nearly 20 years ago and the MusicHall is nearly 10 years old. That said, the Dac1 seems to still very much be considered an industry standard and I was excited to compare it to this MusicHall (the only Dac I’ve ever owned). FWIW, here are my findings:

See signature for details on full rig/chain. Listened to a variety of different genres flipping back and forth from 20-30 second sections of tracks.

I went in with a bias that the Benchmark dac would beat out the musichall in terms of sq and expected to notice a discernible difference.

I used the spdif digital coax input on both dacs. 

Listening through floorstanding speakers via ultrarendu > schitt eitr > dac > amp and on headphones via ultrarendu > schitt Eitr > dac > headphones, I could not tell a discernible difference. Zero. Zip. Zilch. If anything toward the end of comparing the two I slightly prefered the musichall, and I can’t even articulate why. Perhaps my ears aren’t refined enough. Or perhaps I set my expectations for a variance too high based on everything I read about dac comparisons and the “thinness” or “coldness” of the benchmark versus the warmth of a tube dac like the musichall.

Curious to hear input from others. Maybe differences in SQ are more discernible comparing R2R Dax’s with delta sigma dacs?