QLoud is a tool to measure loudspeaker frequency and step responses and distortions.
Find it here:
http://gaydenko.com/qloud/
Changes:
- Step Response plotting is added, this is a direct screenshot link:
http://gaydenko.com/qloud/screenshots/shot04.png
These measurements are done for the same 2-way loudspeaker (see plots titles).
It is clear, a tweeter must be shifted lightly beyond from a listener.