In the rear side panels of the Sub, It has a pair of 4x10 speakers. I would very much like to replace them with 6x9s, to make my speaker choices greater. I'm just worried that the 6x9 will not be big enough to cover the 5.5x12 inch area that the grille for the exsiting 4x10 stock speakers go. I'd like to keep it looking as nice as possible, but I don't have a 6x9 handy to measure the outside dimensions of the frame and mounting points, etc. Anyone have some wisdom to impart upon this conundrum?