Then I have an older xtant A 10" svc 2 ohm sub. Not bad sub at all. Basically this is an Mtx Blue Thunder with cosmetic differences. and very versatile as far as enclosures.
Sealed, ported, bandpass anything...very small enclosures is all I remember. Data is out there.
Again, tons of refs if you search the name here on diyma. Im an adult with a career, this is just a hobby/addiction for me and just wanna do financial harm reduction.