Bass drum port hole placement

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Bass Drum Head EQ3 Resonant White No Sound Hole EQ3 Resonant White No Port 10mil 16 Inches BD16RSW-NP / - (7.5mil + Ring) []

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Bass Drum Head EQ3 Resonant Smooth White No Sound Hole 10mil 22" (7.5mil + Ring) BD22RSW-NP []

Bass Drum Head EQ3 Resonant Smooth Black No Sound Hole 10mil 22" (7.5mil + Ring) BD22RB-NP []

Bass Drum Head EQ3 Resonant Coated White No Sound Hole 10mil 22" (6.5mil + Ring) BD22RGCW-NP []

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EVANS Evans Bass Drum Head EQ3 Resonant White No Sound Hole EQ3 Tom Hoop Resonant White No Port 10mil 16 Inches TT16RSW-NP / - (7.5mil + Ring) []

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EVANS EQ3 Resonant White Bass Drum Head (BD16RSW-NP) - No Soundhole EQ3 Resonant White - No Port (7.5mil + 10mil Ring) 16-inch

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Hole Protector Drum Kick Booster Enhancement Bass Drum Enhancement Microphone Accessories

Port Insert Drum Kick Booster Enhancement Bass Drum Enhancement Microphone Accessories