Why use sound deadening when upgrading your audio system?
Good car audio begins with properly treated doors and panels. Flexing metal panels and expanses of plastic cause a myriad of issues with car sound from bass cancelling road noise to annoying shakes rattles and vibrations. A flexing metal panel can effectively sap the energy away from your speakers by creating inter-cancellation at the rear of your speaker while other surfaces can produce unwanted nasty resonances which colour the sound. The importance of sound treatment should never be underestimated.
In the pursuit of great sound, it is essential to consider all aspects of audio reproduction. Speaker manufacturers make speakers which have been carefully designed for accurate music reproduction, unfortunately, we have to fit them into less than perfect environments!
The average car door is an acoustic nightmare. A thin, unsealed metal enclosure fronted with hard plastic fittings, often with a loose polythene moisture barrier as well. Adding deadening material to your door panel will create a more stable environment for your speakers, reduce vibrations, and significantly increases sound quality throughout the vehicle.
Wave diffusers reduce back waves ensuring a tighter punchy mid/bass speaker performance. Wave diffusers are ultra-dense foam damping material used extensively to control acoustics in the recording studio industry. Now specially treated to reject moisture its benefits can now be achieved in car door applications.
The sinusoidal profile of a wave diffuser helps eliminate rear sound waves from reflecting back through the speaker cone causing sound cancellation. By reducing unwanted sound waves from behind the speaker, greater sound and energy is gained. Thanks to its excellent elasticity, flexibility and damping properties, a wave diffuser will help deliver a far more open dynamic midrange with a much tighter mid/bass performance from any speaker system.
Speaker build quality
As you can see from the image above, the physical difference between the original speaker (left) and the upgrade (right) is quite clear. Although the depth of the entire speaker is more or less the same, the components and build quality of the upgrade are of a much higher standard.
When you compare speaker specifications, you’ll find that the cones found in each driver can be made out of different materials. You’ll see cones made out of paper, aluminium, polypropylene, or things like ceramic/glass fibre polymer. Why such variety in devices that do the same thing: Push the air to create sound waves?
To push air, most cones move in and out like a piston, but at certain frequencies, cones will flex instead. Flexing distorts the sound; by using more rigid materials, designers try to keep that flexing to a minimum.
Cone material is just one example of how materials can translate to a difference in sound quality. The materials used in everything from the wires to the glue in a speaker can impact the overall sound; every piece adds up to the entire sound output of a speaker, which is why speaker designers select each component carefully.