crown pro amps?

[Tom Loizeaux]

I use a Crown PS-400 for the lows and a PS-200 for the mids & highs. These run in class A at lower levels and switch to Class A+B when the need increases. I'm very satisfied with them when driving efficient speakers like JBL studio monitors. Less efficient speakers may need more power.
I feel the K series might lack a little refinement on the high end for audiophile listening. ?
If you want to stay with Crown, you could look at the Studio Reference 1 & 2 amps. Most everyone who hears them say very nice things about them, but they are $$$$!

Tom

[oldschool]

has anybody tried tube preamps with these amps,and if this changed the mids and upper end sound to having more air and sweetness.

[JuniorJBL]

Yes
My KW500 is a tube pre and solid state back-end integrated amp. The better the pre the better your crown will sound