I actually have one of these that I bought used on Ebay. I have used it with Allison 115 speakers - 8"woofer - and I couldn't tell any difference. Could be the speakers, could be the room, could be the electronic subwoofer itself, could be the music, could be my ears. Anyway, I'd be happy to sell it if anyone's interested.
If there is any chance you still have this, one year after your post, I'd definitely be interested in buying it as a add on for my Model 3s
The Electronic Subwoofer
in Allison
Posted
If there is any chance you still have this, one year after your post, I'd definitely be interested in buying it as a add on for my Model 3s