Kickport 2 Sonic Bass Drum Enhancer Chrome Ports the kick drum in the same manner as a bass reflex speaker cabinet which boosts low frequencies Adds ideal dampening directly to the resonant head which allows you to remove most if not all of the internal materials in order to reclaim all of the natural resonance and tone of your drum Adds ideal dampening directly to the resonant head which allows you to remove most if not all of the internal materials in order to reclaim all of the natural resonance and tone of your drum Improves the sound of bass drums sized 16 to 28. It can be tuned up or down by adjusting the tuning of the resonant head.