Class A or AB amp for JBL S4700 speakers

Dave, If you do not want to audition a older or newer Krell, Pass labs is a great choice, I would go with pure class A pass labs amps instead of the A/B amps, with the sensativity of your speakers, you could look into that 100 per channel class A amp that pass makes if you wanted to not spend your house morgage!, the class A amps pass labs makes are way more exspensive than their A/B amps, for a good reason!, stick to class A my friend, cheers.

Ok, thanks. I'm gonna hear Pass Labs (as well as Accuphase and more)again at CES. Yeah, I really wanna try Class A amps. I'm already driving them with an A/B amp, a Bryston 4B, and the Bryston is a pretty solid A/B amp. However, it's lacking in dynamics and transparency, as well as imaging. It plays real loud and has lots of bass, but that's about it. I don't expect it to be as good as Accuphase, Luxman, Pass Labs, etc.

Ok, well .8 or .5? And which model? 100, 160? Also, I don't like Pass Labs preamps. Not enough features on there for me like bass, treble, sub. filter, mono switch, etc. Is there are preamp out there that has this stuff that would go good with the Pass Labs amps?

the 100.8 or 100.5 is enough for your speakers. I would go for a tube pre-amp in your situation.