Since I bought the Utopia 5 months ago, I've been on the quest to tame its sibilant.
My setup before the change was:
- MBP + Audirvana
- Ayre QB9 Twenty
- V281
- Good quality XLR / USB cables (not name-brand)
With stock Single Ended cable, I found that high was almost unbearable (I'm very sensitive to sibilant), so I did my research and found that Dana's Lazuli Ref is among the best cables for the Utopia and can help tame the high, so I did order it.
With the Lazuli Ref, the headphones behaved a lot better [deeper low / meatier mid / calmer high]... but it was not enough to tame the high, as sibilant was still too hot for me for bright albums.
Below are what I did in hope that the headphones can be more enjoyable...
- Replacing my MBP with Aurender music server (sounds A LOT better than MBP) but still too hot...
- Replacing USB cable with Curious Evolved 1.5M (more mellow tonality)... but still too hot...
- Replacing AC cords for V281 & QB9 with Synergistic Research Foundation 10 & 12 AWG... but still too hot...
- Replacing AC cord for Aurender with Shunyata ZiTron Digital (did make a HUGE difference)... but still too hot...
- Replacing fuses in my Dac / Aurender (the server takes 2 fuses) to Synergistic Research Orange Audiophile Fuses... but still too hot...
- Replacing XLR cable with Audience AU24 SE... but still too hot...
All the above but still couldn't get rid of that annoying spike in S / SH sound... until I replaced my wall receptacle (from generic ground outlet) with Wattgate 381 (gold plated earlier model that known to be superior to newer versions). After doing this last step I couldn't believe that my persisting / annoying problem is almost FIXED! (well not 100% since with bad / hot records, those ear-piercing sibilants still came back... but now the headphones sound a lot more agreeable to my ears).
Looking back, the changes above total to over USD 10K (excluding the price of original amp, DAC and other equipment in the system)... and I'm now not sure whether what I achieved is worth it... but what I can say is that the headphones now sound so much more enjoyable and I now understand the potential of these headphones (I'm sure they can improve further with higher-end system). Perhaps if I'd started from the wall receptacle, I wouldn't have to pay this much changing other equipment in the chain.