I just was confused when I took a look at the Caps they put in parallel. For example the 68uf/50V with the 18uF/250V.
Do you know why they do this? And can I replace those two by a higher quality cap with the value of the sum of those two?
I asked myself the same thing. Apparently, the designer chose to put a electrostatic 68uf and film 18uF bypass in parallel for cost reasons. He wrote: "Capacitors: the majority of caps in the standard crossover are polypropylene. There are some high value electrolytics but they are bypassed with PP caps to reduce any distortion". So bypassing is a way to reduce distortion of electrolytics in parallel.
The problem is that there are no 86uF capacitors (68+18), it is no standard value. Closest is 82uF, and 4uf difference is a 5% tolerance difference ,that may or may not impact the crossover. Usually capacitors are in 5% tolerance, though.
