1 large subwoofer or 2 smaller ones...?

Two subs for sure. One of my two is currently out for service and the difference is NOT subtle.

2 small ones in a stereo application ...although those frequencies may be mostly "non-directional"....you have to compromise one way or another with only 1...

a) only hook to one channel (obvious downside) or

b) combine both outputs... (they will sum..and in effect, at times, cancel each other ...or at least work against each other. Do some searches on the topic on the web.... Many out there who can explain it better than me.

BTW.... Thought I could get away with one...now, so glad I have two.

Definitely 2 small ones in a stereo application ...although those frequencies are said to be mostly "non-directional"....you have to compromise one way or another with only 1...

a) only hook to one channel (obvious downside) or

b) combine both outputs... (they will sum..and in effect, at times, cancel each other ...or at least work against each other. Do some searches on the topic on the web.... Many out there who can explain it better than me.

BTW.... Thought I could get away with one...now, so glad I have two.

As they say in all things audio, it depends. I have two. The only real way to find out is buy two identical units at the same time with full return privilege, that means no restocking fees. Try to get a 60 day return privilege as you will find it takes awhile to find the answer. If you buy only one, you will never know if you are missing something, and that will drive you crazy, as all things audio can do.

2 smaller sub(s) if your room can support. I would strongly advise to demo REL prior to any purchase. These are the best subwoofer (s) on the market. They do not disappoint! Keep us posted. Happy Listening.