Replaced the front dash speakers (right and left, not center) with the DB351s...my Bose system dash speakers were surprising light, but the new speakers are brighter sounding, if a bit heavy on the treble...after looking at the spec sheet of the Bose amp, it sends 18w to each of the 3 dash speakers, and 18w to the rear tweets, and the door speakers each get 35w each, but the front doors being 8" units are only 1.25 ohm speakers, so they can make cheap subs...I am hoping the swap to the DXi651s in the front doors, will add some cleaner sounds in the front seats, as the door speakers make all the sound come from the dash, which now makes sense why the rear sounds better when you sit there...