I'm trying to find some information on 6x9 subwoofers. No two-ways, no three-ways, just the woofer. I have a Pioneer head unit that uses FIE (Front Image Enhancement(?)), which is basically a ...

Here’s a look at our AMD Chevelle’s new sound system before it went in. Custom Autosound’s USA 630 II head unit is flanked by its 6x9 rear speakers and kick panel–mounted front speakers.