Vents Without Reducing Low End According to DW's John Good, cutting a port hole in your front head can reduce your bass drum's low end by up to 20%. The DW DRDHGB22K places six 1/2" holes around the edge to project your performance energy out into the room without sacrificing low-end response. The single-ply construction is thin and lively, with a gloss black finish and the iconic DW logo proudly on display. The DW DRDHGB22K features Remo USA's glued-channel crimped aluminum flesh hoop to transfer max vibrational energy between the shell and head.DW drumheads: manufacturer approved for great tone Remo makes all of DW's heads in its US factory according to DW's specs. So when you buy DW drumheads, you can be sure you're getting a good pairing for your DW drum kit. Sweetwater drummers applaud DW for pushing the envelope not only with custom drums, but with modern drumheads