I've been playing my KBP4 through both a B-15n and a V4. The B-15 is my 'practice amp' and the V4 has been seeing most of my gigs.
The tone from these 2 amps is just pure bliss. I am a big fan of the SVT, but there is a nice open quality inherint in both of it's little brothers. I feel that the mids come through alot sweeter with the B-15 and V4. The SVT just pounds your chest in--which is great for alot of stuff--but, for me, the mids are king. I would love to use the B-15 for everything, but it just doesn't hold up in a loud setting. The 100 watt V-4 might not be enough for everyone, but for me, it's more than enough volume.
Thanks Nicky. I've been looking for a v4b for a little while. Low power isn't a problem as I just want it for practicing in the basement and the occasional jam. There's an old B-15N available locally but the price is a bit high.
dave

I was going through an unfortunate 'Coltrane' phase at the time