【Crystal Acoustic Lens｜Deadening Material to Shape Sound from the Speaker Back】

Even after replacing the speaker, the sound ends up ringing inside the door. The bass gets a little blurred, and when you turn the volume up, the door’s metallic resonance becomes noticeable.

That’s when you might want to consider Crystal from Deadening & Material.

By attaching it to the back of the speaker, it absorbs and diffuses the sound waves coming from the rear, reducing how much the sound simply reflects inside the door. In addition, it helps lessen the door’s metallic resonance, making it a useful material if you want to deliver the sound from the speaker into the cabin in a more controlled, refined way.

Crystal features a three-layer structure: a high-damping adhesive layer, a layer primarily made of foamed polyurethane, and an aluminum layer with a pressed surface. By dispersing sound waves, the aluminum surface layer efficiently processes the sound from the back of the speaker.

Of course, it can be used at the same time as replacing the speaker. It’s also a candidate if you have already done deadening and want to further improve the cohesiveness of the sound. However, the appropriate installation method will vary depending on the vehicle model, the shape of the door interior, and the type of speaker.

If it were me, I wouldn’t decide only the material in advance. I’d check the condition of the speaker and the door, then use it in the necessary areas and to the necessary extent. Deadening isn’t determined only by the material’s performance—the final result also depends on how it’s applied, the installation coverage, and how it’s combined with the speakers afterward.

If you’re considering speaker rear treatment or deadening using Crystal, please tell us your vehicle specifications and what your current sound concerns are. Let’s not expand the installation coverage unnecessarily—let’s decide the direction together based on the music you usually listen to and your budget.

Main Specifications / Specs

【Basic Information】
Product name: Crystal
Manufacturer: Deadening & Material
Type: Acoustic lens
Structure: Three-layer structure
Included quantity: 2 sheets

【Structure / Materials】
Adhesive layer: High-damping adhesive layer
Middle layer: Layer primarily made of foamed polyurethane
Surface layer: Pressed aluminum layer

【Main Functions】
・Absorbs and diffuses sound waves emitted from the back of the speaker
・Reduces sound reflection and resonance inside the door
・Reduces the door’s metallic resonance

【Size】
Width × Depth × Thickness: 190 × 220 × 15 mm

【Heat Resistance Temperature】
-45°C to +80°C (under typical environmental conditions)