Bi-amplification

Bi-amplification refers to using two amplifiers to power one set of speakers. This can either be done by using one of two methods:


 * one amplifier to power the left channel and one for the right.
 * advantage: better stereo separation.

The latter method is most common / most preferred for a few reasons. Often, listeners will put a less powerful amplifier on the high frequencies. (One amp per channel obviously wouldn't allow this.) Also, (personal experience alert!) people seem to prefer the sound from this option.
 * one amplifier to power the high frequencies and another for low frequencies
 * advantage: clearer highs / lows.  better imaging.