Finally took the Bryston 4B Cubed plunge

Thanks @phcollie looking forward to your impression of the Bryston.   

As with the JC-5,  after another week of burning in, it started to open up a little.  I can definitely hear more low bass that I couldn't from my A31, but mid and upper bass still lack the slam that I had wished for.   Occasionally, I find the treble might be just a tad too bright.  I have tinnitus on both ears and they are very sensitive to high frequency.   I was hoping it could be just a tiny bit warmer.  

Overall JC-5 is not a bad amp.  I have no doubt that it sounds great to many people.  I'm just looking for the perfect match to my ears.    I'm still considering keeping, but might try to listen to the Bryston before making the decision.

How many of you Brytson guys have experienced the squared and cubed series? I have read that the cubed series has a mellower trebble? I ran a 4BSST-2 with a Pass Labs XP-20 preamp. Playing vinyl and most digital sounded great, especially at higher volumes. But I found a decent number of recordings just sounded fatiguing on the the high end. I swapped in a new Pass Labs XA30.8 Class A amp and it sounds smoother and more pleasing. 
I have no experience with the new Bryston amps and was just curious...

professorsvsu - congratulations on your 4B-SST3.  Bryston makes excellent equipment and is an outstanding company.  I agree with the synergy between Bryston and Audio Research.  I have a 4B-SST2 that is paired with an LS28 preamp and I think it is a great sounding combination. I agree, too, about Parasound.  Bang for the buck they are really hard to beat.  Enjoy!

@xcool,
Spent about 22 hours listening this weekend to the new 4B3. I’m not a reviewer who uses buzz words well but I’ve tried to avoid expectation bias and be objective. First...Noticed it was completely silent. My Odyssey had a noticeable hum if you put your ears to the Magnepan panel. I Like the 23db Gain switch option, matches better with my Tube Preamp. Runs barely warm to the touch. Sound is transparent, precise and neutral. Listening to strings in the upper end takes you right to the edge as the music is actually played but never uncomfortable. I would describe it as clean and sweet but not subdued or mellow. Another change was the firm low end and control in the middle low end that was lacking with the Odyssey. I now know what smear, or rather lack thereof means. Night and day difference in presentation of an image. Listening to Julliard Strings playing Middle Quartets I could specifically locate where the First, Second, Cello and Viola were sitting. When they played the same note I could still separate them. Pace and quickness much improved. Female vocals were full of air and listening to Gregory Porter’s baritone voice is rich and involving. I listened to Folk, Indie, Light Rock, Techno, Jazz and Classical and did not find anything objectionable. Everything is system dependent of course but it is clear that the 4B3 plays well with others so to speak and gets along fine with the Magnepans, My NuPrime Dac10 and the Freya Plus. If your goal is to manage your sound color and timbre on the front end and have the amp stay out of the way then the 4B3 does just that and will not heat up your room. Head room and power is ample & beyond sufficient so I do not see where I need more than 500 watts with my 4Ohm load. Good Luck.