LFE for VPO church installations!
A friend of mine pointed me towards https://youtu.be/NZKCxIuJ-5M -- a self-made rotary subwoofer, which is capable to produce high decibels at the very low frequency band < 20 Hz down to infrasound.
I think this could be a perfectly valid solution for any VPO builder who has the task to install instruments at churches, concert halls, etc. and would like to also implement that "guts feeling" that is present on real instruments, but was yet lost (or at least too weak) on any system using speakers.
I'd be curious if anyone of you is working in this kind of business and, of course, would be eager to hear about real-world implementations in case somebody adapts or already adapted it! :-)