Mystery Capacitor and the Tangent RS4 Crossover

@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.  

@I really appreciate your interest and input

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.