MX 218 and MT 215 looks the best and cool projects for me. I designed and built 2 pcs. Hybrid Bandpass which looks like the MT 215 but with 18 inches speakers I wad tricky 😊... Inserted a small wave guide, to separate the intersection of the wave generated by speakers ( mandatory placed at 90 degrees one to each other) to outside. Mass destruction 😅
Did you know that there is a housing for a dipole subwoofer that can be operated up to 100 Hz and that delivers a high sound pressure, especially in the deepest bass, but only works with one acoustic phase? Of course, its membrane stroke is responsible for the maximum acoustic performance. If you are interested, I can guide you.
