So, I have the Polk DB651S 6.5" speaker in the front. When I got the truck I put these in. I don't even remember if it had 6.5 or 6x9's in the first place. I want to upgrade to some other speakers that actually show a bit more bass. I am thinking of some JBL 6x9 3-way's but was wondering if I need an adapter plate for mounting these guys? Eventually I may put in something like a Kicker HS8 Hideaway for a little more bass. I don't need rattling, just want more bass.