The Townshend super tweeters(really SUPER,btw)hook up with it's own cable,to the speaker binding post,or amp posts.Really easy!The thing I like about these is that it sits "low" on top of the speaker,and is very close to the original(somewhat rolled off)tweeter.This allows a great blend.The Townshends are,also,"tiny" and do not take away from the overall gorgeous look of the Extremas.Some of the other super tweets are set higher in their enclosure,and may not blend as well as the fabulous Townshends.
Best!