Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
No, the 12π is not suitable for use under 30Hz. I wouldn't recommend any horn for use at the frequencies you're talking about. I suggest a large driver with low Fs, or more likely several of them. For use at infrasonic bass frequencies, you really need low resonance and high displacement. Infinite baffle mounted in a wall or ceiling would probably be a good way to go.