my system never sounded bright except in two instances -
1. Ultimate on PSM156
2. Shunyata Alpha v2 NR on amp
I used AQ Hurricane on the PSM156 and it was smooth and I liked it better than the Puritan Ultimate. I actually preferred Puritan Classic to Ultimate on PSM156.
I sold the PSM156 after I ran two dedicated lines - I have all my components plugged into the wall outlets. Yes the PSM156 takes the noise floor down a bit but there’s a reduction in dynamics and extension and the compromise, in my system, to me, wasn’t worth it. I ran my amp at the time, Pass Labs XA30.8 straight to wall. The Puritan tamed the DAC and preamp bit much and I didn’t like the effect. You may have a different result in your system depending on components, power and preferences. Not saying the Puritan is a bad unit, it’s not.