Didn't want to hijack another thread....

I'm interested in deadening the doors a bit more than the inside of the doors. Since the outer skin of the door is one big sheet of metal, it probably resonates like crazy. I've read that people cover the inside of the outer door panel (i.e. VintageMac) and some competition cars which have used expanding foam to fill the void.

I don't expect to go to those lengths, but want to make the doors perform a little more like an enclosure for the 6.5 woofers. The goal would be to get enough performance out of the woofers to negate the need for a subwoofer... trunk space is precious. At the very least, I'll put a square of sound-deadening directly behind the speaker and possibly 2-3" strips that will run the vertical or horizontal length of the door. Save a little weight... ;-)

Acoustic foam was mentioned in another post... is this just scraps from a carpet shop or something like B-Quiet's product? I have a B-Quiet hood liner never used in my 4Runner... would that work?

Not sure about covering the door openings... though it seems to be the common way to do this. Definitely makes sense if you're trying to create more of a "enclosure" type environment. The only draw back of covering the openings is unforseen issues with the window or mechanism. Maybe I'll figure out a way to make some removable panels out of ABS... at least for the large opening.

Any comments or suggestions would be appreciated... even if its "A lot of work to squeeze out a little more sound".

 

i have put deadening material on the outer doorskin in my previous car with great results. only downside is.... if you get a door ding its gonna be next to impossible to do PDR (paintless dent removal) work.

 

Yeah, I thought about the PDR... was hoping the it'd help solidify the door against dings... If the inner sideis completely covered with deadening material, the guy wouldn't be able to get in there anyway...