Wave Diffuser is an ultra dense foam damping material used extensively to control acoustics in the recording studio industry. Now, specially treated to reject moisture, it's benefits can be applied to car door applications offering much improved sound deadening benefits. Skinz Wave diffuser's sinusoidal profile helps eliminate rear sound waves from reflecting back through the speaker cone causing sound cancellation. By attenuating unwanted sound waves from behind the speaker, greater sound energy is gained. Thanks to its excellent elasticity, flexibility and damping properties, Skinz Wave Diffuser will help deliver a far more open and dynamic midrange with a much tighter mid/bass performance from any speaker. Our door pack consists of 2 sheets, 250mm x 250mm.