Dynamat - Does it make a difference in a cobra?

[Tenrocca]

Looking at re-doing the carpets - the el cheapo stretchy speaker box stuff in there at the moment has lasted pretty well but it was only a temporary job at the time.

I see a lot of people put dynamat (or equvalent), and I have search for an answer but does it actually make a difference in a cobra? I would have thought all the other noises that dynamat cant mask would be much louder than the ones it does.

Cheers