Class A or AB amp for JBL S4700 speakers

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.

Luxman also lacks depth. Audiolabyrinth is right about the XA series. With a high sensitivity I also would go for the XA series.

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

I agree with Bo1972, A tube pre-amp is what I have always preferred myself with solid state, Dave, The only pre-amp in the world I know of that has treble and bass controls is Dan D Agostino's momentum solid state pre-amp, that my friend is beyound our bucket list, although the Dan D Agostino equipment is way beyound the pass-labs and krell with performance, A whole different league! It also comes with, what I call stupid money for pricing!, If I had the money, The Dan D Agostino master systems amplifiers is what I would have period, cheers.