Quoted from Jeremyczu:Agreed. I'm looking for a built in swap for the factory speaker. An external powered sub isn't as clean of an installation. Not interested in adding anything outside of the cabinet or adding an amplifier inside the cabinet either.
Then your just sacrificing performance for having it look clean. Adding an external sub is one of the best mods you can do, night and day difference from any speaker kit that will end up be more expensive for less sound improvement.