Passive membrane
Passive membrane for bass reflex speakers:
Advantages of the passive membrane over bass reflex tubes:
- No pipe resonance or flow noise
- No leakage of midtone components from the opening
- volume saving
- More options in the vote
The disadvantages are mostly of a theoretical nature, such as poorer group delay (negligible in space) and, of course, the higher acquisition costs compared to the Bass Reflexrores.