Ya, my 2006 base roadster has the tweets in the door. I'm looking to get more sound up higher around my ears while the top is down so I want to add more speakers on the dash or A pillars some place. The holes for the defroster vents are already there and perhaps only need to be opened up a bit. I'd rather do this before cutting into someplace else on the dash.

As for the defrosters, don't really need them as I live in Houston. The main vents clear up the entire cabin fairly quickly on the worst days.