Help with room treatments

You do have a few things going for you that many do not, your room is large and your speakers are well away from the corners. As Rob mentioned...you are listening at a fairly close distance also. On top of that...your ceiling is a non-mirror of your floor.

Also, the Polks are somewhat laid-back in sound which has to be a plus with your many hard surfaces. The polk SDA technology does work very well in some system setups and my guess is that yours is one of them...the Bob Carver technology that I have built into my Sunfire Theatergrand (Holographic Image circut) can also work very well in some system setups...at least mine does with one pair of my speakers although it does not work well with my di-pole Apogees.

Large rooms with lots of setup flexibility along with seating flexibility require very little room treatments campared to smaller spaces that most have...see how lucky you are!

Dave

Dave
Thank you for your comments. It helps me understand my blessings and why things may be happening the way the are.
Joe

first, nice set-up and beautiful room.....that looks like a great place to listen.

you have a few things going on there.

the two biggest influences on your sound are the TV and the ceiling......neither of which you likely want to fool with. if it is not too heavy, try listening without the TV.......or try covering it with a blanket. another consideration would be some sort of tapestry that might hang from the ceiling to eliminate first relections.

if you do remove the TV, NOW those blankets over the windows may have much more effect. the solution i would recommend however would be a pleated window covering from Hunter-Douglas called Duettes......which will break up reflections without over deadening things. these can be lowered and raised so they will blend into your window casements and you will barely see them.

you will not believe the effect of controling the ceiling relections.....maybe experiment with some towels or blankets.

your speaker design, where the front baffle is very flat and broad, actually is helping by reducing the backwave toward the window of mid to high fequencies. you pay a penalty in perfomance compared to a narrower baffle but get the benefits of the reduced reflections.

overall, your speakers are far enough away from the room boundaries to sound pretty good.

good luck.

Thank you Mikelavigne for your kind comments and suggestions. The TV isnt likely to go anywhere at 220 lbs., but I can try blanketing it. Also I will try a temporary blanket/quilt on the ceiling. (some day when the wife isnt home:) If it works, do you know of any attractive acoustic panels that might attach directly flush with the celing?
I am familiar with Duettes and do find them attractive and practical. What are the likely drawbacks to a wide speaker baffle? I think you are probably correct that the wide baffle is saving me from expected reflections from the windows and TV.