1-1st of all, which 804-D, S, Nautilus, or matrix?
2-2nd, if your speakers stay true to the B&W pedigree, then it's not that it is too bright, but rather revealing of less than ideal sources before the speakers- whether source recording, cdp, electronics, cables. You need to upgrade probably the whole front end. demo some Classe, Macintosh, Bryston, et al. Search the forums here and read about equipment from B&w owners. Good luck.
2-2nd, if your speakers stay true to the B&W pedigree, then it's not that it is too bright, but rather revealing of less than ideal sources before the speakers- whether source recording, cdp, electronics, cables. You need to upgrade probably the whole front end. demo some Classe, Macintosh, Bryston, et al. Search the forums here and read about equipment from B&w owners. Good luck.