Confused Musical Presentation

Disclaimer!.... I have neurological auditory damage from exposure to military ordinance without hearing protection and therefore wear hearing aids. I have suffered a considerable amount of hearing loss above 3000Hz. The effect is similar to a treble tone control turned all the way down! However, I've been a music lover and audiophile since the early 80s and have enjoyed a lot of different systems over those years. My present system consists of Wilson Sophia 1, Quicksilver V4 (KT150), BAT 32SE, Cary DMC 600SE, and analog front end is driven by AVID Pulsus and ZYX 4D. Cables are Analysis Plus all around. I have minimal room treatment in 17 x 28 dedicated listening room. 

My  Problem: Listening to small group jazz (90%), typical audiophile fare, and solo instrumental and vocal music is simply breathtaking even at higher volume levels.  (My max on the volume is 80 out of 140 on BAT) No issues at all. However, when the music gets complicated/complex everything goes to crap! Soundstage collapses, music is jumbled together. There is the same effect even at moderate listening levels. Any suggestions to remedy this would be greatly appreciated.

Mike