Or know a site that explains in depth, the effects of cancellation, how to avoid it, how it's incurred, etc...? I'm running six 12's, and a 13.5" sub in my firebird..and want to figure out placement/posistioning to avoid this as much as possible.
cancellation is basically when you have sound waves or harmonics reflecting off of flat, reflective surfaces from multiple speakers that are out of phase, and cauise destructive interference, canceling out the other soundwaves.