@cal3713 Another vote for the Jupiter Coppers in your application as a cap to be placed in series with the Accutron tweeter. I used the Jupiter in my Coincident Super Victory II for that application with a Duelund Silver by-pass, and could not be happier. In the end, all we can do is guess. The good news here is that it is not hard to improve on the Solens, but no one can tell you for sure what the "best" cap for your application is going to be. Just be aware that the Jupiters are painfully slow on break in. They oscillate between really good to really bad for at least 120 hours, maybe 200, and apparently it is common for them to require 400 hours to completely stabilize.
@audioman58 I am also perplexed by the crossover design in the PREs. I don't know what one might find in the woofer cabinet, but since the preferred wiring arrangement is a direct connection from the monitors to the amps, with a second set of cables running to the woofers, and since the monitor enclosure contains only one crossover in series with the tweeter, I must surmise that the midrange is being run full range. It would seem that the midrange is truly crossoverless, with no inductor or capacitor in series or even in parallel. When I rebuilt the crossovers on my Coincident Super Victory IIs, I chose to stick with the stock Solen 12 and 14 gauge inductors. I don't regret the decision, but of course it may have been possible to improve upon them. I think the big bang for the buck here is going to be in swapping out the tweeter cap. The PREs are already superb, in my humble opinion, speakers. It may not take anything more to get cal3713 where he wants to be.
@audioman58 I am also perplexed by the crossover design in the PREs. I don't know what one might find in the woofer cabinet, but since the preferred wiring arrangement is a direct connection from the monitors to the amps, with a second set of cables running to the woofers, and since the monitor enclosure contains only one crossover in series with the tweeter, I must surmise that the midrange is being run full range. It would seem that the midrange is truly crossoverless, with no inductor or capacitor in series or even in parallel. When I rebuilt the crossovers on my Coincident Super Victory IIs, I chose to stick with the stock Solen 12 and 14 gauge inductors. I don't regret the decision, but of course it may have been possible to improve upon them. I think the big bang for the buck here is going to be in swapping out the tweeter cap. The PREs are already superb, in my humble opinion, speakers. It may not take anything more to get cal3713 where he wants to be.