Bi-amping works well if speaker is designed for it. Works the least well using passive cross-over and best with active 24 db/octave. I currently run a tri-amp system that I am very pleased with. I recommend a 4:2:1 ratio for woofer:mid:tweeter amps. Getting the coils out the crossover reduces phase shift and gives a much clearer image. The direct connection to the amplifier makes the sound much crisper. The down side is 1) the drivers are defenseless from rogue transients. 2) A veritable wiring nightmare. 3) A lot more tweaking is required to optimize the sound. (some people think this is fun!) Most people doing this sort of thing are speaker builders rolling their own. Passive cross-over design is complicated and the engineering is usually what you pay for in high end speakers. You can circumvent the cost by buying "high end" drivers (Scan-speak, Dynaudio, Focal etc), building your own cabinets and investing in extra amps and electronic cross-overs. Gentleman, start your multi-amping!
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.