durwood
100+ Head-Fier
Why are you running these tests at those levels? The distortion information based off a 118 db fundimental is irrelevant as that's not a level anyone who likes their hearing would ever listen at. Surely that information is going to look much different at 90 or 100db. Those levels are probably well above those drivers upper operating limits so now your seeing information reflecting a driver being driven beyond its given operating range. I'm not sure how that is helpful. I'm surprised that they are not damaged with a freq. sweep were the first 100Hz are at 130db; Wow!
No I just haven't figured out how to compensate in REW yet. Best I have been trying to do at the moment is adjust the levels, measure with an app On my iphone (put earphone to iphone mic, play REW test sweep, adjust level until ~85dB, then measure away. They were both at the same level, so it is a comparison. It's not the end all be all of measurements and I am in no way a professional.
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