Is your room a "closed-in" 11.5 X 13 X 10?
If it is, you will most certainly be challenged by unavoidable bass modal problems as your first obstacle to deal with. Set up will be critical for best speaker to speaker location, including seating possition(s). There will be trade-offs, also depending on your set-up(long wall vs. Short wall) set up, etc.)
MIGHT I STRONGLY SUGGEST a speaker sellection scenario(in addition to careful speaker and seating possitioning) where you can BIAMP, AND EQ your bass woofer separate from your midrange/hi-freq drivers!!!! IN a room that small, you'll have to overcome some bass anomolies which will keep you in that "small-room-boom" and or "peaky", bumpy, small room sonic signature(which you're trying to overcome ideally).
As it is right now, your Prelude P-FR's(which I used to own by the way) are definitely giving you that "one-note" boomy bass with little pitch definition, speed, and that unavoidable small room sonic signature unfortunately.
I say this and I'm not even in your room!...but I know what's going on there mostly.
In that small room however, if you can get a good Parametric EQ on your bass woofers, and leave your upper frequencies untouched. you can potentially get a tremendously balanced frequency response, while maintaining your sonic purity and integrity in the midrange on up!!!
For a lot of full range speaker situations in small rooms, this is often a tremendously good solution.
Keep in mind, speaker and seating locations as a foundation are still of utmost importance from a starting point. (as you can't overcome bass "nulls", for one.)
After you get your speaker set up for proper response, you can then concentrate on treating reverb, reflections, and other acoustic challenges in the room. Just be careful not to over-dampen your small room. As it's easy to get a DEAD SOUNDIng room easily in small room situations I find.
Yes, indeed, there are lots of books and articles to suggest sound treatments for rooms. But in the end, you'll have to experiment, and try for yourself to know what's doing what! (it will take time and experimentation on your own..otherwise it takes money and professional help!)
Another route you could consider would be smaller satalites and subwoofer combinations. There's more latitude with sub placement vs. satalite placement, since the two usually don't ideally work as good in the same exact location overall! This lets you place the woofer(s) in their best possitions, and the upper frequency units to be possitioned in theirs. Also, you can EASILY EQ a powered subwoofer for ultimate performance!
Books to go through: F. Alton Everest's "Master Handbook of Acoustics(2-3rd addition, as 4th addition has many mathematical errors!!!!); F.A. Everest's "Studio Construction on Budget"; Robert Harley's, "Complete Guide to HIgh End Audio";Back issues of Stereophile Guide To Home Theater's "Home Theater Architect" article(1999-now!)
Or search the net for more acoustics related.