KICKPORT KP1WH WHITE, The KickPorts patented design enhances the sound of your kick drum by doing four things:
1) It ports the kick drum in the same manner as a bass reflex speaker cabinet which boosts low frequencies.
2) It adds ideal dampening directly to the resonant head which allows you to remove most if not all of the internal materials thus reclaiming all of the natural resonance and tone of your drum.
3) It focuses the air as it exits the kick drum and this compression increases punch.
4) Its tunable!