here are some links that might help...
optimum room size
http://www.decware.com/paper36.htm
room calculator
http://www.mcsquared.com/modecalc.htm
Dealing with room nodes
http://www.audioholics.com/education/acoustics-principles/room-modes-and-dealing-with-them
room tuning review
http://www.avrev.com/equip/roomtune/index.html
good luck
optimum room size
http://www.decware.com/paper36.htm
room calculator
http://www.mcsquared.com/modecalc.htm
Dealing with room nodes
http://www.audioholics.com/education/acoustics-principles/room-modes-and-dealing-with-them
room tuning review
http://www.avrev.com/equip/roomtune/index.html
good luck