Played outdoors on a slightly elevated wooden stage with the rig while the rest of the band went through the PA. Had my Sennheiser wireless hooked up so I could walk out into the audience and hear how it mixed. Warwick Thumb 5 to the wireless. Wireless to a tuner then an AB box splitting as follows: LMII-->Aquilar GS 210 GK 700 RBII ---> Avatar B212 Neo Both rigs set essentially flat with a little tweeter. Some tweeking to optimize each cab. Some clip in both preamps noted. RESULTS PA 1, rig 0. What was more interesting was how fast the bass cab sound trailed off relative to the PA. 30 feet from the stage, the bass was pitiful. Also, the bass volume varied all over the place as you walked from left to right. On the small stage, there is no way I can turn up load enough to overcome the PA without killing the keyboard player who is right in front of my rig. CONCLUSION Add Bass to PA Question? Can running different amps and cabs in parallel cause destructive wave interference.?