I have heard those PSBs paired with Bryston monoblocks and they sounded quite dynamic and very musical. Aside from your room configuration - on that later, your issue as said before could be a matching issue. Your space arrangement seems to suggest you have a ~14' open space behind your listening position which could be a problem. Your 16' ceiling is another potential culprit. Also, I had a very similar experience but with completely different components where I had a real long and narrow room with tall ceiling and I could never get the near-field set up work for me using basically half of the length of the room. I moved everything to a smaller (repurposed) bedroom - 8' ceiling but the same exact distances for near-field listening and it all came alive. Try some temporary room treatment, especially behind your listening position and see if it makes a difference. Finally, looking at the measurements for these PSBs, a large portion of frequency band operates in 4 or less ohms - particularly the area where most of the music energy lives so by all accounts these speakers are putting a high demand on your amplifier's power supply.
PSB Synchrony One Speakers and Pass XA30.5 Amp
For a while I've been driving a pair of PSB Synchrony Ones with a Pass Labs XA30.5 amp (and Pass XP-10 preamp) and I find I'm still fussing over the sound. This combination seems to lack liveliness on most recordings, and this observation seems at odds with the descriptions I've read here about the speakers' character. I'm wondering if this pairing is just not suitable? I listen to a wide variety of music but mostly jazz, classical and choral. I'd like some suggestions on other amps that might do better (greater liveliness) with the Synchrony Ones than the XA30.5. My room is roughly 24' (L) x 10' (W) x 16' (H) with the speakers firing down the 24' dimension although I can only sit 6-7 ft from them.
Thanks
Thanks