Which Bryston?

I am looking for a better amp to drive my RS1B bass columns and have heard nothing but good on the Brystons. Question is, which one would be the best ? The 4B, 4B ST or the 4B SST? As stated, I will not be using it for uppers or mids, just bass.
I owned the 4B. If bass is your concern, grab one. You won't be disappointed.
You can post your question over at the audiocircle in the Bryston circle. I believe that James Tanner has stated several times that the new transistors in the SST models make them superior.
Hi Jeff,
All of those 4B models will work just fine. Just don't opt for the 14B as it is a Bridged tpye amp and the base feedback control system will not operate with that type of amp. You will love the RS1b's. I drive mine with two SAE 2600's @ 400wpc ea. Best speakers I've ever had.
SSTR's used are still really pricey.The 4B ST is what I'd buy for front pair (just got one for a buddy wo has very revealing Maggie 3.6's and he loves it).They had big leap foward with redesigned transformer I belive (don't quote me there though).It is, for mains, most bang for buck.But be prepaired for $1250 at lowest and more like $1500.for a sub the 4B would work fine but you probably won't find one with any or at least m uch of the 20 year warranty.But it will be more like $750-800 and work just fine for a sub.As far as waranty goes don't sweat it.Like the old Crown DC 300's ( a venerable musician and PA amp) they are waaaaay overbuilt and should last 40+ years if well ventiallated and not abused.
Thanks, I am using Kenwood L-09m monoblocks for the uppers/mids. For the bass columns, I am currently using an EV 3200AP, which has more than enough power, but wondered if a 4B would be an noticeable improvement?