Hello CWelsh52 and everyone, I'm glad that active crossover works well for you, but it doesn't make things any easier for me. I still don't know which type of amplifier is best for direct connections to a horn speaker with a recommended 800 Hz crossover frequency and a 15 inch woofer? Thanks
Well it kind a depends on what sound you like. At the moment, i am driving a 15" bass woofer with an F6 and a Fulltone driver with the ACA Mini, with a crossover point (-6 dB) at 160-170 Hz. All driven by a ZM iron Pre and a NP FR EQ before the BiAm6-24. The ACA Mini is to be exchanged by a ZM LuDEF amp very soon.
Some of the questions you can consider, for choosing an amp:
What is the sensitivity of the driver?
What is the resistance (8/4/??)?
What kind of sound do you like? Consider harmonics, both the content (neg 2nd dominating, 3rd dominating etc.) and the amount - to my ears, too much harmonics content, can make some simpler music sound out of this world, while take the life out of more complex music
Some might use a class D for bass and choose a glorious sounding, low efficiency class A amplifier for mid and tweeter.
There is no correct answer, the fun is in the journey
By the way for the right music i highly recommend the ACA Mini, it really sounds good - instruments and voices are magical with it.
On one of yours the lead spacing looks to be 15mm. I think you want 5mm for that figure. I can't see that data on your second cap variant. For what it's worth I used these:
https://www.digikey.com/en/products/detail/wima/MKS2D021001A00MSSD/9370565
https://www.digikey.com/en/products/detail/wima/FKP2D014701G00HSSD/9370190
These for my first variant and recall the crossover point is as you calculated. I've since changed those caps to cross ~ 100hZ.
Paid the princely sum of $3 for a wood +mdf chassis. These crossovers are so quiet at least in my experience require no shielding, I had it sitting naked on top of my Iron Pre no problems.