Ditto to what S7horton said. Only a couple of very general things to possibly elaborate on. The strengths and weaknesses should tend to compliment and cancel each other, to achieve meaningful synergy. For example, if you have an amplifier known to be slightly bright, it's probably best matched to speakers that are slightly warm, to get an overall semblance of neutrality to the sound, etc. Things like impedence matching, etc. also come into play. Several other Audiogon members are likely to be much more knowlegable about this than I am, but that's my very basic understanding of the term.
-Bill
-Bill