Acoustic Zen Crescendo speaker crossover capacitors ... who makes them?

I now think the tweeter and mid board is fully burned in and the end result is spectacular to be sure. I plan on upgrading the binding posts in the future as the final step in the transformation of this great speaker. A great design that is begging for top end crossover parts. The drivers are very high quality as well as the speaker cab. The crossover design is first rate. Robert should be proud of his effort with this speaker and the crossover upgrades I performed just helped his fine design be all it could be! I changed no part of his design or schematic. I did not mess with values. 

I think Robert should offer this speaker with upgraded crossover components as the speaker responds so well. The Super Crescendo option would cost more, but there is a market for the upgraded speaker I have in my home. 

Sherod,
I’ve met Mr. Lee on several occasions and he is very gracious, friendly and accommodating. He’s proud of his speakers and deservedly so. They are the result of much time, effort and talent he has put forth.

I believe that he takes the position of "hey I’ve put everything I could into making this a sucessful speaker ". He may feel a sense of resentment that someone would come along and "tamper " with a speaker he’s put so much thought and energy into building. I can appreciate how he and other builders could adapt this attitude. Some may even feel insulted.

Yet I have to agree with Bill that clearly acknowledged excellent products "can" be improved further with carefully selected higher quality parts . Better quality parts will upgrade performance compared to lesser quality parts. In fact some manufacturers do recognize this and enthusiastically offer upgrade packages.

Just as someone can resort to tube rolling to improve sound quality, one can "roll" capacitors, resistors and wire using the same rationale. 
Charles

I am a firm believer in upgrading with better quality capacitors. I have improved my Reference 3a Dulcet and MMC crossovers with Audyn True Copper Max with spectacular improvements. I also have refurbished at least six vintage tuners by replacing all electrolytic caps with Elna Silmic II and Black gate caps with amazing results. I have no doubt that just replacing all the sand cast resistors in the AZ Adagio crossover would make for an improvement. 

Finished the bass board upgrade and again I am happy with the results. Nothing like upgrading the mid/treble board to be sure in terms of total improvement, but a nice little improvement in bass resolution or articulation. Very slight. 

If someone else wants to upgrade their Crescendo speakers, I would be happy to help any way I can. I would suggest an outboard crossover if you have the room and a spouse that is ok with it. Good idea to get these parts out of the vibration woofer box😎 Behind and under woofers are not the ideal spots sonically for crossover boards. It would be fun to place them in external boxes With vibration mitigation footers etc...

The speakers are now totally broken in and sound so wonderful. They sounded great after just 24 hours of break in, but now have improved in the areas of openness, ease, and realism.

I am actually thinking of getting another set to do the same exact mod, except putting all the parts in an external crossover! We will see as I have to run it past my wife. More boxes in the room :(