Hi, When we worked on rebuilding the crossovers for our IRS V's, Arnie Nudell recommended the following list of components to us. I would suspect there may be some similarity it what you should use:
· Mundorf MKP capacitors
· Goertz foil inductors for the tweeters and midrange low pass filters
· Jantzen Permite core inductor for the midrange high pass filter
· Metal film precision resistors, using multiple resistors instead of single large wire-wound cement filled type
· Metal film resistors and a 12 position switch instead of the rheostats
Best of luck with your project. The change was a big improvement for us.
Larry
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