The Bass Drum O's Bass Drum Porting System is an easy and sleek way to add a port hole to your bass drum's resonant head. This metal ring can be installed in less than ten minutes, and will even cover up any slight mistakes or inaccuracies in the cutout!
Just trace around the inside of the Porting System on the resonant head, cut along the ring using a box cutter or other high-precision blade, and then add the ring! The Porting System uses strong adhesive rings to make sure it won't budge, even if you bump it with a mic stand or a pillow while you're changing the head or getting set up.
