I'm looking to upgrade my squawker really soon and research on size. please throw in some feedback. I know 3 1/2 is what I need but what about the depth?? What needs to be done to get the new squaker to work? what's the max depth I can use?? current set up: HU: autopumpkin 4.4 Front speaker: JBL GX963 Rear speaker: JBL GT7-6
