Hmmm, I'm gonna give it a try, seems like deadening the hatch area of the cabin might do the trick. I've been wanting a cargo cover too.
The 'storing the car cover in the rear' got me thinking about ways to quiet the car down a bit. Then this...
I went on quite the sound-deadening adventure earlier this year. Did the whole car with a layer of Damplifier Pro from Second Skin, then a layer of closed-cell acoustic foam, and finally a layer of mass-loaded vinyl. The bottom of the hatch area got two layers of Damplifier Pro, and I already had a Corsa catback (stock headers and cats). Still sounds good outside, but it's significantly quieter in.
That was an 'over the top' application, and I'd love to hear how nicely you dampened the unwanted noise, so I did a compromise.
I took out the felt liner under the spare and all that. Put Dynamat on the entire area; all under the spare, across the floor, into the side wells. Then I 3M glued the closed-cell acoustic foam on the underside of the felt liner, which also goes side-to-side.
While in this area, my woofers in the back were determined to be junk (all the foam deteriorated) so I replaced those.
Anyway, reassembled the area, tucked everything in tightly and wonder-of-wonders the 'bad' noises are subdued mightily. The exhaust still makes its wonderful pitch (metal high flow cats from JonB)but the booming noise under the glass is now gone.
And I can actually listen to the stereo now (I had no idea how bad my old speakers were!) if I choose that very rare option.
I do NOT have pics (yes, I should be fired) but suffice to say, this is a '2' on a scale of '10' in difficulty, only requiring a careful blade and some contorting to reach the side wells. Gettting to sniff the 3M trim adhesive is just a side benefit.
I am super pleased with the result.
... get a Corsa 3" cat back for your GTS and the drone is gone!
