mhester wrote:I see the big sub cutout in my 2007. Not sure what fits there. 10" for sure maybe 12". Mine is not Bose. The bass in the front speakers is muddy and boomy. Need to make it tighter. I assume there's no sub-out on the head unit. If I can figure out how to wire in a sub, then perhaps I would replace the door speakers and put bass-blockers in to let them only reproduce over 100Hz
if you mean lookin for a preamp output on the factory radio.. i so highly doubt it but there is little converter cables you can buy, try crutchfield