Ok, I have 2 lightly used Stereo Integrity HT D2 drivers for sale. Both are lightly used and babyed in a home theater environment for the last few years. I was one of the three designers of the infamous "Marty" sub, and these were the 3rd and 4th ever created (only because Marty finished his 5 days before mine lol). These are the original sub 17hz monsters that we originally designed and tuned to 16.7 hz according to my calculations.
Selling the drivers (which cost $300 each) for $125 each ($250 for the pair)
HOWEVER, if you want them in their fully functional subwoofer form (meaning installed into 16 cu ft marty subs...needing only an amp to power them) I'll give them for the same price. all that you need to do is be willing to haul those suckers yourselves.
otherwise, same price just for the driver and we can meet up wherever.
Anyone who knows what these are knows they are absolute MONSTERS in a home theater environment. I'd personally like to keep them, but I have too many subs and not enough house to store them and the wife is getting pissed.