@LCfiner There are issues with both. The first one you quoted is uncompensated, and seems in line with the usual JH tuning before compensation. The latter graph is using a common diffuse-field compensation, and seems to have been inserted too shallow. The shallow insertion brings the peak lower in the treble, rather than in the top octave in which the drivers are naturally attenuated.
8/11/14 at 6:18pm