In reply to:

I mean, cover the part of the graph above 500 Hz and look at the low frequency part (that's what we are interested in). An immediate reaction would be: well, looks like the sensitivity is about 90-91 and there is an about 12db/octave roll-off with fc=100Hz.



I'm not quite sure I understand your concern with the roll off under the 85 Hz rating. Why would a steep roll off in the first two octaves be of concern when the 150 is typically crossed over @ 80Hz?


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud