Mystery Capacitor and the Tangent RS4 Crossover

There are definitely times when you want to do a complete speaker analysis.  Infinity speakers, old Yammies come to mind.

One thing to keep in mind is that we used to use a lot of bypass capacitors because big films were too expensive, and achieving good results was cheaper with big electrolytics and small films in parallel.

In any event, the proper way to go about doing this is to measure each driver's electrical and acoustic properties, in place, and simulate the crossover using something like XSim.  I encourage you to go over to the DIYaudio forums where people snack on these issues all day and you can post pictures.

Best,

Erik

This might help:
https://www.electronicshub.org/capacitor-color-codes/#Capacitance_Color_Code_Table

Don't alter the component values of that crossover! Those values were chosen by extensive listening tests by the designer! Only replace the electrolytic caps with similar values of new poly caps. You can replace the two inductors (coils) with air-core types - if the originals are solid core. But again the replacements' values must be equal or very close to the originals - to maintain proper phase and amplitude response between the woofers and tweeters.

I owned a pair of the Tangent RS2's back in the 80's. Excellent speakers. if a bit too "British" - laid back! Well, they are not JBL's!