Special deadening light when purchasing and installing trade-in speakers at the same time! Improved sound quality and quietness!

The original deadening stage 1 SURFACE was created as a result of trial and error to find out whether the deadening that we have cultivated over the past 25 years could be done at a lower cost and in a shorter time.
The contents are similar to the advanced original deadening stage 1, where only the surface of the door is constructed in the same way, and the inside of the door is only the back of the speaker, so even doors that require complex disassembly can be deadened as an extension of speaker replacement. By doing so, we reduced time and cost by minimizing the number of parts and disassembly required, and created a product that focused on the parts that would be most effective.
* Front door left and right. If you would like the rear as well, please contact us separately.