I recorded a frequency sweep in REW last night. This is what I get with the JBL's and the PB16 ultra. I used the frequency sweeps to match the volume level on the sub for a pretty flat line (slightly sloped toward the bass end of things) and this is what I get with no room correction. I did move my listening position slightly forward and it helped with the dip I was getting around 150hz. This is with 1/6th smoothing.