I will be doing my room testing and dialing in my system when I get back home in a few weeks. With the new room dimensions I don't have a clue on how things will measure out. I know what the math says, but until I start working in the room I can't assume anything. In any case regardless of the frequencies involved, the room will have modes at known dimensions of the room. I am mostly concerned with nulls as they are more difficult to deal with. If I happen to find a bad one during my testing I would like to have a plan in place to possibly deal with it. Being away from home right now is the opportune time to put a plan in place.
I am not so concerned with my length dimension yet at being 25.25 ft. My original room was at 15 ft, since I listened against what was then the long wall. Adding 10 feet to that created my new 25 ft length allowing me to use the law of 5ths for both speaker and listener positions. That should keep them out of those peak zones in that dimension.
But, my listening position will be centered between the two side walls. Placing the listening chair at the center position between both side walls creates symmetry having pros and cons. On the positive side this is best for creating a very good soundstage, which I highly value. But, on the negative side this places the listener at the worst point to experience the peaks and dips in frequency response for that dimension of the room, its width.
Is it possible to place a large bass trap along one of those side walls directly on the side of the listening position that would lessen those modal issues for the listener? If so, what sort of bass trap would be best, one that uses simple absorption, or a membrane design? Also, how large would it need to be to be effective? I was thinking of trying several boxes of 703 stacked creating a cube. I see no reason to open the boxes and 4 of them would make a cubed column 2 x 2 x 8. They could also be easily moved around to see where the best position would be. Am I on the right track here?
