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BackBoxx BackStopp Acoustic Insert


Order now and we'll ship same business day (if ordered before 3 pm PST).

NOTE: This is a heavy/dimensional part; it is not eligible for free shipping.


WARNING: Cancer and Reproductive Harm –


Dampen Sound Passing Through Walls

Reduce sound distortion and prevent sound from passing through your walls with the BackStopp Acoustic Insert. This sound absorbing foam absorbs excess sound from reverberating through your speaker and walls, cleaning up the in-room audio and diluting sound waves from reaching the next room over. The BackStopp Acoustic Insert works with both in-wall and in-ceiling speakers and provides insulation from exterior elements and temperatures.

  • Sound absorbing foam absorbs soundwaves to reduce audio distortion and sound transmitting through walls
  • Compatible with all open-back drivers and many in-wall and in-ceiling speakers
  • Balances mid-range audio responses and tightens sound cavity acoustics

Place the Backstopp Acoustic Insert inside your BackBoxx housing before installing your speaker. The Acoustic Insert can be trimmed to perfectly fit inside your BackBoxx housing. When you are satisfied with the Insert's size, remove the adhesive backing sheet and adhere to the BackBoxx.

Professional Partners Backboxx™

BackBoxx™ products make you more efficient, more profitable with your time, and more professional in appearance. Although many of their products are designed to help you meet local and national building codes, installers also use them for an insulation-free project, wire protection during construction, and blocking of other trades from critical wiring areas. BackBoxx products are designed by custom installers who know that ease of installation means no hassles. Our products are simple to use and time-tested in thousands of applications each year.


  • Manufacturer Part #: BSPP
  • Dimensions: 22.5" L x 14.5" W x 1" D