The sound difference when fitting sound deadening pads to the inner door skins and card to the Daihatsu Copen is massive. Improved sound quality from the speaker - deeper, richer bass and the doors feel solid.
http://is.gd/DX5YqD
Shark XTCRU500 Sonic Duo Replacement Pads, 2-Pack
Includes Carpet/Rug Cleaning Pad and Scrub 'n Stain Removal Pad
Scrub 'N Stain Removal Pad to attack