Hello once again Jeff. Its been a while since we last spoke.
So here are my thoughts regarding this project -
I'm going to make recommendations here as if you had no capacitors or budget.
Assume no restrictions on budget, and we can take it from there.
The perfect cap for all the series positions to the ribbon is the Jupiter Copper. On a budget, SO. This ribbon will not be bright with any of the caps in question, so I would tend to refrain from using warmer SG, SGO, Flat Stack, etc... This in part is why this tweeter works (musically) at all with a gritty, edgy, bright cap like Solens.
So then if using Jupiter Copper Foil Cap for both 6.0 and 15.0 uF values should do the trick. This would come to $1700 to cover both speakers.
To lower the budget, if I were to use the 6 uf Cap for Jupiter Copper Foil, and have the 15 uF value consist of the 6.8 and 8.2 uF Mundorf Supreme S/O, would you see any issues audibly with this mix of caps for the ribbon tweeter?
The midrange would benefit from a true film and foil unlike the ribbon (even though the Jupiter Copper is a true film and foil). This mid would never have any issues with clarity when using any single winding film and foil. Now for the weight, and rich harmonic bloom? The Jupiter VT Flat stack would be the best way to go. You should use all large values. On a budget, your planned caps would be fine. However, I would work a larger VT Flat Stack into the mix with those MRs.
So for the 12 uF value, I can use my 12uF Jupiter VT Flat-Stacked Cap
For the 80 uF Value, I can use either - (two 25 uf for) 50uF for Clarity Cap MR, and then (two 12 uF for) 24 uF for Jupiter VT Flat Stacked, leaving me with a 6 uF Cap to purchase. Perhaps I would need another 6 uF Jupiter Copper Foil Cap, or a 3.3 and 2.7 uf Mundorf Supreme S/O? Any recommendations?
I have 25 uf Values to work with for the Clarity Cap, and 12 uF Values to work with for the Jupiter VT Flat Stacked. If the mix of values should be different, I am open to suggestions.
The woofer shunt would benefit from a stack of G1s or ESAs, but that too would be costly.
Are there any other shunt caps besides the woofer circuit (including parallel shaping networks)?
How would I be able to tell if a cap is connected as a shunt? The manufacturer does not offer schematics of the crossover design, so I will have to ask them, or I can visually inspect the crossover board.
Thanks much Jeff!!!