Some more pictures from the last tests with TDA:
Pic1. Mutual cancelling of the front channels (appr. 260, 460, 800, 1600Hz) and influence of the infrasonic filter.
Pic.2 - Best possible dfr for the present install (3way passive)
Pic.3 - 2D delay presentation
As one can see, cancellations on the first pic. are gone. Without infrasonic filter the sub became "closer" to the front. Sounds more tight and accurate.
Mutual cancelling and ultrasonic filter.jpg