so 703 would probaly be cheaper? Did you just hang any on the wall flat or just corners. I'm getting a bad null between 50ish hrz up to 70ish. The test tones rise in db's and then around 50 it drops off to almost nothing and then starts rising again around 70. Thats why i'm not getting the mid bass. Room treatments are first then getting the Velodyne sms 1 this summer.