With much help from Paul Spencer, I was able to do some gated measurements on the Francesca prototype. One thing we puzzled over was the frequency response of the midrange. Here is the 1m measurement (gate is about 8ms): Red is on-axis, blue is at (approx) 30 degrees. The frequency of the dip, around 1700 Hz, doesn’t correspond to any of the baffle dimensions! If it were the first dip in the dipole response, a 30cm wide baffle should exhibit this dip around 1150 Hz, not at 1700 Hz. And why does the depression continue up past 5 kHz? This was a puzzlement. In theRead More →