Rega Elicit R w/PSB speakers

The Acoustic Arts is a nice amp, but a weak built-in phono stage is often the case.

Synch One or Two; big difference. The Ones need high current to drive their
low impedance levels.
If it is 105 wpc into 4 ohms it's too low.

As in your other thread, advice will be the same; look for an amp that doubles it's power from it's 8 ohm rating to 4 ohms. (or close to double)
The impedance curve of the One's shows how hard they are to drive; The amp has to be able to drive the spkr below 4 ohms.

Rega Elicit...
105 Watts per channel into 8Ω
162 Watts per channel into 4Ω
Looks too low IMO. But the website states a Class-A driver stage, so I don't know.

Were you able to try any other amps from your dealer?

That Bryston only has 180W into 4 ohms. I think a Bryston would be a good amp to drive PSBs, but remember the Synch One's impedance drops below 4 ohms, so I would think it might need higher power; it depends on the size of the power supply of that amp. If I remember correctly, you were missing the fullness of bass with your other amp.
But, I'll bet the 3BSST can drive your Synchs.

Hi Fishing716. How are the Brystons working out with the Synch Ones? How does the amp compare to the Acoustic Arts?

BTW, there is a new thread where a system sounds dynamic when first turned on, then later sounds weak. It's probably a different situation than yours since you were able to document the change in dynamics.
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1382476029&read&3&zzlMusicland1&&