Bass builds up in corners especially near the ceiling.Did you try the traps straddling the corners behind the speakers?Prop them up on the back of a dining room chair to get them up higher and see what you think.
Digital Room Correction For Speakers
Any suggestions for a digital room correction device which is easy to use. Or is it better to buy a pair of speakers which has the system built in such as Vandersteen. Any feed back is appreciated.