http://forums.klipsch.com/blogs/andyw/archive/2007/09/07/bi-amplifying-or-bi-amping.aspxThis is the practice of running two amplifiers (and two pairs or wire) to each speaker, one amplifier for the woofer, and one amplifier for the tweeter. Of course you can also tri-amp, quad-amp, etc., depending on the number of drivers employed in yourenCommunityServer 2007.1 (Build: 20917.1142)