The following is from B&W tech support is response to my question about BiAmping the B&W 801 & 802 speakers. "We did not make an external crossover for the Matrix series for use with bi-amping. Once again, bi-amping with an external crossover changes the characteristics of the speaker outside of B&W's design, effecting performance and voiding the warranty (and can cause damage if not done properly).
Biamping -- any good?
Recently, I read a speaker review in which the reviewer indicated that biamplification (versus use of the conventional single-amp configuration) had noticeably improved the sound quality of his speakers. I find this to be very interesting; however, having no experience in this area, I was wondering if anyone would care to share their good/bad experiences? The info you provide will assist me in determining whether I should pursue this aspect of audio or not.