Aquarian Drumheads RSM18BK Regulator Black 18" Bass Drum Head, Gloss Black 20 Peak Diaphragm Displacement Volume (Vd):

Peak Diaphragm Displacement Volume (Vd): 44cc

including the API 2520 Op Amp

The HERCULES Guitar Stand GS414B PLUS features the upgraded Auto Grip System (AGS) yoke

large-diaphragm dynamic instrument microphone with a tight cardioid polar pattern

Aquarian Drumheads RSM18BK Regulator Black 18" Bass Drum Head, Gloss Black 20 Peak Diaphragm Displacement Volume (Vd):These single ply, resonant bass drumheads feature Aquarians patented "Floating Muffling System." They are perfect companions for the Super Kick and Impact series batter heads. The Regulator heads are available in Video Gloss black or white. They are available with a large 7" hole in the center, a 4 " hole off set, or a full head with no hole. Regulator Gloss Black 10mil thick drumhead 10" centered felt muffle ring Small 4 3 4" offset hole Resonant