Get a vivid information regarding 3 way speaker crossovers and learn how these networks in a three way speaker system can produce a hi- fi quality output due to proper separation of music frequencies through them.
Explanation of speaker loads and impedances; how to wire guitar speakers in series, parallel, and series-parallel; how to calculate cabinet impedances; wiring diagrams including switched mono/stereo cabinets.
Here's a helpful guide to show you how you can wire 4 (not just 2!) speakers AND a sub to a 4 channel amplifier. I've put together some detailed diagrams to help as well as a .pdf version you can save and print. If you're wanting to power your whole car stereo system with just one amp don't pass this post up.