I'm all for efficient use of resources but clipping your amp (likely what's happening with the van) and pushing your drivers to max excursion (likely what's going on with the 2 12" in the gym) and making your woman want to leave the house (the first vid) are things that would get you a
from me.
The enclosure design reminds me of the bandpass enclosure which is extremely peaky, and although didn't sound horrible (I was 20 the last time I heard one),IMO if you want to listen to something nice and over and over again for years to come a nice sealed or tuned ported box is the way to go.