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How Much Polyfill Should I Use? [Solved]

Most people use 1LB of fiberfill per cubic foot of space in the woofer as their rule of thumb. Or, you can just add it 1/2LB at a time. It’s up to you, since the “right amount” is the amount that ends up sounding best, so you may want to play around with it for a while.28 Mar 2012

Does Polyfill make a Box BIGGER? Tested and Revealed

All across the forums people claim that

Poly Fill VS No Poly Fill

take

How to speakers have more bass, how much polyfill in sub box. M17

How to add