This article explains how to squeeze a little extra performance out of your audio hardware by bi-wiring and bi-amplifying stereo speakers. Small improvements can really add up and often turn a great system into a great one.
How to Bi-Amp and Bi-Wire Your Speakers | Home Audio Basics
Make sure you are using the correct connections, as not every speaker can be bi-wired.
A speaker should have separate terminals (two pairs of binding posts) for the woofer and midrange/tweeter. Sometimes they are marked "high" and "low". Sometimes they are not marked at all.
If you are unsure, we recommend consulting the manual for more information before attempting to bi-wire speakers.