Mystery Capacitor and the Tangent RS4 Crossover


 I have a pair of Tangent RS4s whose crossovers I am currently in the midst of trying to rebuild (Early 80s British 2 way speaker). I used to power them in the 80s with an Adcom GFA1 amp (200 watts/channel which I understand both Bob Carver and Nelson Pass had a hand in designing back when Adcom was based in New Brunswick, NJ, my old home town). Apparently, either time or I did a fair amount of damage to those caps (probably both) and some are hard to id, particularly one that looks like a piece of pink sugar coated candy with green, white and violet stripes? I'm working on a schematic for this crossover so I can get some expert opinion on the project and maybe id the capacitor value by process of elimination. But I am new to this and am learning as I go. If there is anyone out there interested or who could lend some assistance I would be happy to share/learn.
I set out to simply replace the caps but am beginning to question the design and wonder if it could not be improved upon. For starters it seems to have a lot of caps for a two way crossover (8 in five styles), plus 2 resistors and 3 coils. Modern designs I have looked at typically have two or three caps for 2 two way crossover.The drivers and cabinets are in good shape and I have always liked this speaker which sports a 200mm Audax bextrene cone woofer and a 19mm KEF t27 dome tweeter, housed in a nicely crafted 42.5 liter walnut veneered mdf cabinet, all of which has held up amazingly well over the yearsI'll try to figure out how to post pictures to this site if anyone is kind enough to offer assistence.


Ag insider logo xs@2xbruce19
@bruce19     The pink cap is a film cap,  most likely a mylar.  If you are doing the work yourself, I would recommend replacing the parts with Polypropylene caps throughout.    If they were mine,  I'd do a complete crossover rebuild based on listening to the parts individually and measurements.    Its hard to give much advice without a ton of information that we will not likely get on a thread like this.  Good luck,  
Tim 
@timlub As it turns out I have gone that route with guidance from the stellar tech support man, Josh, at Madisound I bought a mix of Solen and Claritycap polypropylene caps. It is worth mentioning that Solen is made in  France and Clarity is made in England and the Tangent's Audax woofer was made in France and the KEF tweeter was of course made in England. Nice little symmetry eh?
You'll find out if you nice symmetry when your finished.  The folks at Madisound are nice folks, but through the years, I've learned to get it right, I had to do it myself.  I didn't always get accurate advice. Hopefully, all will work out well for you. I started building speakers in 1979 and started in the speaker business in 1980.  
You will note in the picture is the infamous pink mystery cap that prompted the start of this thread, which has since measured at 2.25mF. I’d be curious if there is anyone out there who can tell me that the color code matches my measurement.
The capacitor value is 2,200,000pF or 2.2µF which is within tolerance of your measured value at 2.25mF.

Because the first and second digit both are red (2), that’s why the color band look thicker than other bands. The third band is green (5) represents the multiplier, the fourth band is white represents 10% of tolerance and the bottom band is red = 250V.