
Pictured above is the left Profunder 624 Enclosure
and one of the four bass engines mounted in the front seats.
Oh, by the way my old sub which has a new job as a stand for my centre speaker, uses a JBL 2242H driver, which is also used in JBL's top of the range 4645B THX approved cinema subwoofer. I tend not to move it around too much, it weighs in at 103 Kg. It's even hard for two people to move.