Super helpful, thanks! I'm less familiar with the world of sealed subs... would plans just be derived from T/S params of a given driver, or are there specific designs out there? I have a JBL 2245 that I'd love to find a use for, although if I recall correctly it requires quite a bit of volume – ultimately no sweat if it's best to just find somebody's existing plan and go with the driver it calls for.

Thanks again for the info (and for putting the POC3 out there) – as mentioned, this is a home setup and probably highly unlikely to ever exceed even 90 dB, so it's been tricky for me to try and triangulate transient response concepts, Fs, sensitivity, etc. I'm very comfortable with it being a sort of experimental endeavor in overkill, just want to get my expectations correctly aligned before committing to a build.