Jebe1
Robert answered one question I had as an inductor and resistor were on the board and not soldered in the circuit. I wanted to confirm he meant to leave them out of the circuit. He did make a change and decided the speaker sounded better without these parts in play. He also offered to help to should I have any other questions. That is the extent of what he helped me with.
The 40.1 speakers are amazing and every bit as good as the Crescendo speaker. I sold them for aesthetic reasons in our new home and shared living/listening space. I would say the Crescendos go deeper and more powerful in the bass while the 40.1s seem to play all types of music and poor recordings well. They are so smooth and easy to like while the AZ speakers are more dynamic and resolving.
The upgraded AZ speakers just widen the gap in improved resolution, dynamics, and refinement.