In this video I talk about 4th and 6th order bandpass subwoofer enclosures, how they work, and provide information to help you decide which one to build.
TIMESTAMPS FOR THE IMPATIENT
4th Orders: 3:57
6th Orders: 6:59
Similarities: 11:13
Conclusion: 14:02
5th Order Video (watch from timestamp):
https://www.youtube.com/watch?v=CZaRQT3Rvaw&t=102