5/6 channel amp with laidback,soft, smooth trebble

Try some room treatments instead of buying a new amp. Absorption at your first reflection points will likely be much more effective than buyin a new amp.

Tell me,What kind of speakers? What kind of cables? What components? That would be very helpful in solving this problem

maybe you should consider using equalizer. I give thumbs up on Onkyo receivers

Alright Glen, the speakers are little Klipsch SB1's/SB2's, cables are Monster M550i and M1000 digital (both of which should be smooth/forgiving on top...not sure on digital..tinkering), speaker cables are some bare copper I'm using (will try switching speaker wires...one component at time for sure, however), receiver/pre/pro at the moment is Marantz SR5400 (which, on it's own is smoother and less bright than when adding the Parasound 806 I'm using from the pre-out's...however it's hot nearly as dynamic).
Anyway, I'm using the Klipsch's becuase they're cheap, but clear, dynamic, and focused, with lots of pressence(horns?)
Anyway, I new before using them that the cheep tweeter they're using is a bit bright and up-front. Infact, I've used tubes on these speakers to EXCELLENT RESULTS! However solid state is another matter.
So, I'm trying to make em work in a 5.1 channel system.
By the way, I've read the Parasound HCA885 is a smoother/more forgiving amp than the HCA806. Maybe I'll try that. Any more suggestions?...they are appreciated

Audio Refinement