Whise Profunder 624 and Bass Engines

   
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.