Many bass drum heads have a muffling ring around the inner edge and that is supposed to eliminate the need for further muffling inside or outside the drum. Take a look at the "PRODUCTS" link at the top of this page.
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TheLemonAid
Posts: 172
Joined: Aug 28, 2009
Location: Groningen, The Netherlands
As far as Remo heads go, the most muffled bassdrum heads are the Powersonic and the Powerstroke Pro. As Peter said, check the products page on this website.