Blackhole Stuff Acoustic Damping Resonance Control Material

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Snap Finance Car Stereo

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Available in multiple quantities packages, choose what best fits your needs below.

Single Bag: (1) 12” x 12” (For 8”, 10“, and 12” Subs)
Double Bag: (2) 12” x 12” (For 10“ and 12” Subs)
Box: (12)  24” x 24” x 5.5”

100%* cotton acoustic damping. Treated for mold, fungus, mildew, bacteria. Class A fire retardant.

To provide better acoustic damping for speaker and subwoofer enclosures.

Blackhole Stuff is a material designed to be used as a filler for enclosure applications. The goal in using Stuff is to provide a material with superior resonance control compared to foam, fiberglass, polyester, or wool. Stuff sustains its shape, volume, and will not collapse; Retaining its full efficiency over time. *Over 85% recycled.

Free Shipping over $99

All order over $99 are shipped Free in the Contiguous United States (48 States). Please contact us for shipping to Hawaii and Alaska.

Sounds Good Stereo

We are an Authorized Car Stereo Retailer. All of our products carry a full warranty from the manufacturer along with tech support to ensure you have a positive experience with your purchase.

Snap Finance Car Stereo

Get approved through Snap Finance for up to $3000 plus a 100 day same as cash payoff. They do not run a credit check, so no harm in applying. Click here to get pre-approved with Snap Finance or text 18712 to number 48078. Then you can use your virtual card they provide at checkout. Learn more by clicking here.


We hope you are happy with your purchase. However, if you are not completely satisfied with your purchase for any reason within 60 days from purchase, you may return complete and like-new products to us for a full refund, store credit, or exchange.


If you find a lower current advertised price on an identical brand new item from another authorized retailer (as listed by the manufacturer), we will match or beat their price. While some restrictions do apply, we want to know what it will take to earn your business.


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