I have been a very close friend of the Shahinian family since the late 70's and know of the Contra Bombarde sub very well. In my opinion this is perhaps one of the finest subs ever made. If you can snag one on ebay and you have the room for it, I would grab it. As with the majority of Richards products, they were very complex, overbuilt using Finland Birch plywood, and very expensive to hand build.
Just my .02 worth
Stu
Audioparts Inc.
Just my .02 worth
Stu
Audioparts Inc.