The Bass Drum O's HCB4 is a bass drum port, you install it easily and in addition to improving resonance and low end. It also makes the installation of a microphone easy and will not require any more damping material on the inside of the shell.
- Bass drum port
- Color: blue chrome
- 4 inch
- Provides a harder, better punch
- Boosts the lower frequencies
- Eliminates the need for damping in the bass drum
- Improved head response
- Easy installation
