【Diffusion ESDS-02｜Diffusion Sheet for Car Audio】

Tune the in-door acoustics for clearer music

Even after replacing the speakers, the vocals sound slightly unclear. The contours of the sound blur. You want to bring out more of the detailed expression in the mid-to-high frequencies.

If so, consider Deadening & Material’s Diffusion ESDS-02.

This diffusion sheet is installed inside the vehicle door and uses three actions—diffusion, reflection, and absorption—to improve the door’s internal acoustic environment. It helps prevent the sound coming from the speakers from getting disturbed more than necessary inside the door, making musical information more organized and easier to listen to.

In particular, it works on musical information around 1kHz to 2kHz, which is said to be easy for the human ear to perceive. It’s well-suited for cases where you want to bring out vocal expressions and the subtle nuances of instruments in an even more natural way.

Also for finishing after speaker replacement or deadening

The Diffusion ESDS-02 is not a part meant simply to make the sound louder.

Rather than increasing the amount of sound, it is a material that shapes the reflections and how the sound resonates inside the door, enhancing sound cohesiveness and clarity. After replacing speakers or performing deadening, it can also be an option if you want to further fine-tune the details of the sound and the ease of hearing vocals.

However, even with the same product, the results will vary depending on which vehicle you use it on, which installation/deadening contents you combine it with, and where you place it. Compatibility with your speakers and deadening materials also matters, so you can’t simply add the product by itself and expect the best effect.

At LOGON, we propose solutions focused on the necessary parts while confirming your current system and door condition, the music you usually listen to, and the sound direction you’re aiming for. If it were me, I would first check the vehicle condition and your audio concerns, then decide whether to use it.

Who Diffusion ESDS-02 is suitable for

• Those who want vocals and detailed mid-to-high frequency expression to be a bit clearer
• Those who want to further refine the sound after replacing the speakers
• Those who want to review the finish of deadening from an acoustics perspective
• Those who want to prioritize sound cohesiveness rather than volume or bass quantity
• Those who want to move toward a state where you can enjoy music comfortably for a long time inside the car

Sound changes are difficult to judge based on specs alone. Depending on the vehicle model and your current audio setup, it may be better to prioritize different installation work.

Even if you’re at the stage of “I don’t know what I should add to the sound I have now,” that’s okay. Let’s sort out together which parts are worth spending on, while looking at your vehicle.

Main Specifications / Specs

【Basic Information】
Product name: Diffusion ESDS-02
Brand: Deadening & Material
Type: Diffusion sheet for car audio

【Specifications】
Materials / Functions: Acoustic tuning material using diffusion, reflection, and absorption
Recommended use: Acoustic tuning for the inside of vehicle doors

【Size】
Width: 140mm
Depth: 420mm
Thickness: 12mm

【Package Contents】
Diffusion sheet: Pack of 2 sheets