I was pleased with your speakers, Fred. The measurements look good and the speaker sounds good. Average sensitivity is 90dB and it's flat +/-5dB from 40Hz to 25kHz outdoors, standing upright. Like you said, it's within a couple decibels over most of the range, with a graceful hump for a couple octaves in the vocal overtone range, adding just a hint of extra presence. I think you designed a real winner!ART Array Frequency Response at 2.83v/1M