You can find polyfill for your subwoofer at major retailers like , Michaels , and Hobby Lobby , or through specialized audio merchants like Crutchfield and Parts Express . Local Stores
For polyfill specifically marketed for speaker enclosures (sometimes treated or optimized for damping), consider these online specialists: Polyfill For Subwoofer - Amazon.com where to buy polyfill for subwoofer
If you want to pick it up today, standard polyester fiberfill—often used for pillows and crafts—is chemically the same as what’s sold for audio and can be found in the craft or fabric aisles of: You can find polyfill for your subwoofer at