1 Subwoofer or Are 2 Better??

I did and they are. I am referring to one or two of the same subs. One large or two smaller ones are a much closer call. It depends on the subs, REL has something on this on their web site, also look at Sumiko site. They think 2 subs "load" the room better than one. I think I know what they mean and agree but their explanation is best direct from them.

Stands to reason, everything else being equal, that having a second sub would help to smooth out room modes and standing wave issues, due to the multiple launch positions. Although I can't speak from experience, because my speakers are pretty much full range and I don't use a sub.

Regards,
-- Al

Kind of like cupcakes; two is always better than one.

two subs are better. particularly when you can hook them up with separate left and right audio signals, rather than each one having a combined L+R sub signal.

two make the soundstage better in my system. i am particular about the directionality of sound and two subs always disappear better than one to me.

and i would rather have two smaller subs than one big, honkin' one, but i suppose that's more of a matter of personal taste.

I did go from having 1 sub to 2 and found the bass was more evenly distributed.