The top graph is off-axis to the tweeter side, with the bottom graph being off-axis to the other side. This is in Vertical mode. Fairly satisfying, as there is relatively little sag around the crossover region – 60° off-axis is only down about 5dB. Even the tweeter is good through about 12kHz this far off-axis, meaning that it should be surprisingly listenable at this point. On-Axis (yellow), 15° off-axis (red), 30° off-axis (green), 45° off-axis (pink), and 60° off-axis (blue). Note that this suggests that putting the tweeter to the outside would provide the best results – indeed, my ears suggested this, so it is satisfying to see measurements in support. The tweeter rolloff 30° off-axis with the tweeter on the outside is as smooth as just 15° off-axis with the tweeter on the inside. And from 1kHz to 4kHz stays pretty much solid throughout.