I ended up with a pair of REL S2’s. Their high level connection made more sense because I wanted them to seamlessly act like an additional bass wofer on my towers. REL told me they would also take some of the work load off my towers to produce better mid range voicing. The key is making sure you do not set the volume too high on the REL’s. I set mine at 40%. I wonder what others set theirs at. I just didn’t want the bass to sound too boomy.
It would be nice to have my system set up professionally. One dealer specializes in Master Setting speakers. I read up and pulled my towers further away from the way and put the REL’sin the corners. I measured both speakers from back corners of the speakers from the back wall and the front corners of both speakers from side ways to make sure everything was the same on both sides and pointed each speaker perfectly to the listening area. I did the same with the REL. I was amazed by the difference in sound. Pulling the towers forward from the back wall 18” made a huge difference. If I had to do it all over I would still go with the REL’s.