Will the Energy s10.3 be enough in my room?

My room is 12.3 x 20 x 8 ft. ceilings. There are two openings in the room. Would this Energy sub be sufficient for a mostly HT application? Maybe 65% movies and tv shows and 35% music. Would running two of these be better than finding one $400 sub that was more powerful? I don't think I need something that will make my bowels go weak but I do appreciate good sound as well as an excellent value. I'm not the type that watches movies so loud it's ridiculous. This seems like a great deal and I already have all Energy RC speakers so I'm a believer in the quality of the item. Newegg seems to keep saleing the Klipsch RW12D for $300. Should I wait for that one to go on sale? Are there better recommendations for me than this?

How do you run two subs anyway? I think my Denon 1910 has one LFE output. Do you just use a splitter to each sub?

Awesome. Thanks for getting back to me. I'm wondering if one would be sufficient. It's been suggested that two would be much more efficient but it's also twice the price and footprint. I appreciate the feedback I've gotten so far on whether one or two or a different sub entirely would be best. Does anyone else have an opinion they'd care to share?

I ordered two. Thanks for the feedback. Now hopefully the projector people are as helpful as I figure out how to handle that.

Wow. I didn't realize how crappy my last sub must have been. One of these can certainly fill my room with ample bass. I'm getting a splitter today to hook up the second one but what a difference.

Can I get by with any old male to two female rca splitter or is there a level of not good enough here?

Thank you sir. Any old it is.

I didn't have just one hooked up for long. I ordered and received the second one right away and I think it's great. I first just cranked up the subwoofers and was blown away. It was knocking pictures off the walls. After I ran Audyssey I have the subs at about 3 and the bass is much more subdued. The effect is that it is there and pleasant but when a train explodes or something the walls and seats rumble. Rather than constant sound pressure it comes in when needed. I was actually surprised that Audyssey wants the bass at that lower base level but I'm trusting the software for the appropriate levels.