At the concert venue where this study was conducted the typical speaker compliment consisted of 8 EAW 740/760 or JBL Vertec line array boxes flown over a cluster of eight to twelve horn loaded subs- per side, that is- pushed by 30 to 50kW of Crown or Crest amplification. These systems typically had the capability to go flat to 25 Hz at levels some 15-20dB higher than they were run at. I can assure you that neither lack of system capacity nor the musical tastes of the sound crews had anything to do with the result. As to the first part of the question, the egg came first, as the first chicken was the product of the mutated DNA of whatever layed that particular egg.