I have to admit, I've seen them in the catalog but I didn't really register their usage. So please excuse my ignorance and there are of course also other connectors that are well within the needed range of audio applications.
Hey OP. It depends on your goal. If you want to know what sound you want, a DSP based EQ may be a great tool. If you are not sure what uH you need to get your crossover to move one way or another, maybe VituixCAD or XSim are helpful.
You can buy ALOT of separate caps and coils for that money. That's crazy! I doubt they'll be selling many of those.
