Finally took the Bryston 4B Cubed plunge


Back in January, I solicited folks on the forum for input on the Bryston 4B cubed amp. I was kicking around the idea of replacing my Parasound A21 amp. After dealing with poor health for the past few months, I finally did it! My take on the Bryston is: it's a keeper. It is a better sounding amp than my A21, but by only a very small margin. The Bryston gives the feel of being in a concert hall. An extremely full sounding amp with great detail and there's more emphasis on instrument placement than I've experienced before. The bass doesn't suffer at all either, very tight and clear. In comparison only to the two amps I'm discussing, if the Bryston were a "10", the Parasound would be a close "9". If I were to improve on my system (God forbid, I already have $35K into it), the 4B cubed would definitely be driving it. A premium solid state amp. 
To all the the forum members that were willing to guide me with their opinions, I give a heartfelt thanks. My previous posts (inquiries) were met with sincerity and am grateful that none of the discussion went off the rails. A few members contacted me personally, some I couldn't respond to. I didn't try to ignore anyone, there's simply a downside to old age and a weak heart.
professorsvsu
@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.
Thanks @phcollie for the great update. It sounds pretty good to me! I think I’m going to try to audition it at home. Will post an update if I do. Thanks again!
Hi @phcollie I finally managed to audition the Bryston 4B3 and compared it to the Parasound JC5, but at the end I decided I will keep the JC5.   Here's my impression of the 2 amps.

When I first hooked up the Bryston, right away I noticed the improvement in the bass.  It's got nice slam and punchiness.   The amp also seems very quiet.   The high end does seem to have a little more details than the JC-5.   My first impression was pretty good, and I thought it was going to be a keeper.

After about 3 weeks, the Parasound JC-5 started to open up.  The bass has improved.   The sound stage is wide open.  There is a lot of space between instruments.   Overall there is this sense of transparency to the amp, it feels like it is just quietly sitting there and delivering the music without getting in the way.   It's very quiet and probably a little more so than the Bryston.   The bass doesn't have the slam of the Bryston, but it goes a little lower.   The highs doesn't seem to be as detailed as the Bryston, but it is still very good.   Overall I find the JC-5 to have a smoother sound and much easier to listen to.

Bryston 4B3 is a great amp,  I can see myself being happy with it.  Really love the bass.   But at the end, the JC-5 is a little more suitable to my taste.

Cheers!
I am very late to the chain but wanted to join in. I have a Bryston 4B Cubed, BP26 with the power pack, BDP2, BDA2, PMC Twenty5 23 speakers. The sound is absolutely fantastic. I was also using the Focal 1028BE but the sound was to bright so traded them in for the PMCs. I should have bought the Twenty5 26.

Thanks
Good day to you all, I'm very happy to find this thread. Please allow me to compare my limited experience. We had an extended comparison at the society between high class solid state amps including Bryston (4B3), Pass, Gryphon. Members agreed 4B3 more than matched the others in resolution, transparency, soundstage and realism and 4B3 had more authority and involvement. The member who organised the test was planning to purchase Pass, he opted for a set of 4B3 to drive his JBL Everest ($40K a pair). He also owns Krell and Levinson, they are gathering dust. 4B3 treble is as good as any transistor amp but bettered by good valve amps. I think the traditional reputation of lively/strong bass/mid at the expense of grainy treble was true for 4B and 4BST but no longer true for 4B3. The biggest improvement may have occurred with 4B2 when the output circuit was radically changed but I have no personal experience of the 4B2. We also found the following (no cost) ways. 1) Try to buy the dealer demo 4B3 it takes a huge amount of time to run in 2) The unbalanced (phono) input gives a much more involving sound than the balanced input. Happy listening! (Disclosure, Bryston/Thiel for past 20 years).