Hi @ronkent, congratulations on the subs. I expect you are already aware but REL has a number of very useful videos on their site about how to dial in a sub and a stereo pair. Can be somewhat tedious but fun to work through. It still amazes me how much a dialed in stereo pair adds to the "richness/depth" of the SQ. It's so much more than just "bass".
All the best...

