Oh my, I’m getting closer.
The field produced by this one was so much more powerful. The bass shakes the xG3 so much that my ear kinda hurts now, and I can detect it with my sensing magnet from 7cm away. More turns and a better core material helped a lot, but I don’t think scaling up any more is a good idea (or even possible). I’ll have to get smarter.
I’m getting much better oomph out of the bass and lackluster performance on the treble end (great sound quality but poor distance). I have to figure out a way to get higher frequencies to travel farther, and dampen the bass a bit.