Aquarian's PTCC pre-ported resonant bass drumhead has a center-positioned 7" porthole that makes for easy miking and placement of internal resonant sound control by the user.

A protective vinyl material around the edge of the hole helps to prevent premature tearing.

This 10mil, Single ply head is left wide open with no muting. The amount of muffling is left up to the discretion of the drummer.