Capacitor

Rather than replacing the entire cap, you may want to get a really good cap of a smaller value, say 0.1uf or .22uf and bypass the existing 100uf cap. Audyn is not junk, they are reasonably good caps.  

If the cap goes to ground, then it’s shunting all the frequencies above that driver’s cutoff to ground, essentially a short circuit,

Man, I no longer have the time and energy to explain the basics, let alone the subtleties of even ordered crossovers. This crap  is why I barely post here.

@erik_squires-     'Man, I no longer have the time and energy to explain the basics, let alone the subtleties of even ordered crossovers. This crap is why I barely post here."

          Things certainly have been getting silly, in these parts!

     Crossover gurus, that can't understand (maybe) an 8 Ohm, 130Hz*, 12dB/oct (Butterworth), low-pass network?   🙄

                                 *260Hz, if 4 Ohm

100uf 6

Are you sure its 100uf.
Thats a  lot of uf's. My Seas W18E001 woofers take either a 10uf or 8uf, I am running 12uf, Mundorf SESGO and Supreme Silver Oil
Best  caps for rock solid bass

I've found the copper foil in oil caps from companies such as dueland, Jupiter and miflex sound the best, but these can get quite expensive and are quite large

VERY Expensive. I prefer Mundord SESGO or Supreme Silver at just alittle less cash and stunning results.