I started pondering subwoofer calibration methods (did someone say engineers are boring? ). It seems that if pink noise is used (equal energy per octave), then raising the crossover frequency (so that the sub covers, say, three octaves instead of two) will increase the measured loudness. One would be tempted, then to "turn down" the sub to achieve the reference calibration level. This can't be a good thing if one is trying to maintain proper level for all notes, ie. the pluck of a single open "E" string (41 Hz) of a bass guitar. Am I thinking about this too much?