For your car, Dynamat is the solution. Applying Dynamat to the panels surrounding your speakers eliminates speaker panel distortion by transforming the flimsy sheet metal into a solid non-resonant baffle.
STP CRYSTAL PRO Multilayer lenses combine of: cold-molded aluminum foil (100 μm), sound-absorbing and polymer layers.
Sealing vibro-deadning rings: acoustic foamed rubber.
Absorption of speaker back wave distortion for high-quality sound
Operating temperature range from -40C to +80C
200 mm, 160 mm, 141 mm, 120 mm, 96 mm, 66 mm, 45 mm rings
190x220x15 mm hexagon panels