Have personal experience. Was given two aluminum cone Audiopipe 15" car subs mounted in the typical car trunk box some years ago. Tried with an SVT head, sounded horrible. TS params available, ran the graph using TermPro (on MS-DOS!), box way too small, huge peak around 50Hz. Had 2 empty sealed 1-15 cabs approx 18" cubes, TS alignment showed essentially flat to 37Hz with that internal volume. Tried in these, didn't sound too bad but the specified 96dB sensitivity was obviously a lie. At the time, had access to audio measurement equipment and a well damped test room (a recording studio off-hours) Pink noise @10 watts, on axis, 1 meter, 1/2 space, measured -4dB down at approx 39Hz, slight hump around 42, sharp rolloff above 1.2kHz. Already had massive bass equipment, boxes went in corner of garage and forgotten. (Resurrected and dusted off 5 yrs ago as low end on a biamped rig and still using)
Conclusion: Can be done, but much better alternatives available. Need so much power that stock in the electric company is advised.
Conclusion: Can be done, but much better alternatives available. Need so much power that stock in the electric company is advised.