| Re: Memory foam
Memory foam is open cell foam and therefore should work okay. However, I agree that it would be fairly expensive compared to other alternatives. I was considering using carpet cushion (polyurethane carpet pad) for my sonotube subwoofer. I ended up using the egg-crate style mattress pad foam (from Walmart) as the twin size was less than $9.00. It was much lighter than the 6lbs density carpet cushion that I had available.
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