Two subs in a small room....

I can't imagine needing a sub in a 10x10 room.But,that's just me.

10 x 10 is small but I still have two channel setup that sounds good and where I sit gives nice separation which I would think would happen if dual subs where used. Or is a sub and/or dual subs dependent on the size of the room?

Otherwise, if a 10 x 10 room is too small for dual sub, is it also too small for 2 channel? I mean am I actually listening to a mono setup because of the size of the room?

Unless you want a real lot of bass.A lot of rock? Shaking the room with movies? Or if you want to catch the lower bass your
present speakers won't go down to,then go with one good 8" sub.With one good 8" sub,it may blend in well,and still give
you those lows you just want to hear.It all depends on what you want to do.

It's probably useful to think of "woofers" rather than subwoofers. Some subs aren't really subs at all, in the literal sense. (See the thinline models from NHT with response to 38hz). Remember that bass issues are pretty severe below 150hz in most rooms. Good monitors, together with a pair of (so called sub) woofers placed flush against the walls, will probably help mitigate these issues - versus floorstanders which place their woofers out away from the walls. Note that the bass response in such a monitor/"sub" system will be smoother, even if it isn't particularly deep.

Good Luck

Marty