Steve Germany

As many C6 know there are no enclosures on the rear 5 1/4 speakers. I made forms up to cover the open areas and then used that expanding foam insolation to seal up the enclosure. On the passenger side there is a one way vent to releave some internal car pressures (I guess) but at least it is not open to the interior of the car. The difference is very noticable - much richer and the bass is much more full. This fix will probably not h elp the Bose originals but if you are up grading the rears this is a good cheap tune up that also quiets the car some.

docrings1

Pics, please!!!!!!!!

Steve Germany

Sorry - the car is all back together but it is pretty simple. You simply go to home depot and buy a can of that expanding foam stuff. Cut a cardboard form to cover the front of the speaker frame and tape it in place with masking tape. You then build up the new wall with the foam. For the back cavity you just fill up the hole with the foam. Once it has dried remove the cardboard and shape the foam with a knife.

sallen619

Crutchfield sells speaker baffles for $6.99...

scott_fx

those speaker baffles are used primarily for protection against water/moister

Steve Germany

The foam is VERY strong and allows you to create a sealed box. The enclosed area acts as a spring allowing the speakers to perform to their intended performance. The shields you are refering to decrease the performance of the speakers and the rear speakers in the C6 need no protection from the elements. This is an excellent, inexpensive, upgrade to allow 5 1/4 or better, 6in speakers to be added to the C6.

hughesjd2

What about drilling a hole in the wheel well behind the speaker and filling the void using minimum expanding foam. I think this would decrease tire noise in my C5 but have not tried it yet. Not sure if there is anything in this space that would be adveresly affected.