I had a woofer in need of reconing and no center, so i used one of the 166's as a center and turned the other into a sub. I attached some pics of it. I kept it so i could turn it back into a 166 in the future but for now the port is in the orginal hole for the tweeter and it seems to be working well. The driver is a car audio JBL GTI 1200. From what i have heard its a pro audio woofer or at least based off of one, any truth to that? Check it out and let me know, thanks