In article ,
John Stone wrote:

If the existing film caps are polystyrenes, I wouldn't
bother replacing them at all. Polystyrenes are about as
good as it gets for crossover caps. They are very stable
and would not go bad unless the system was heavily overdriven.

Well, they look like polystyrenes, but I can't be sure. Even so, they're
20 years old. Don't they degrade over time?

Since you have no way of referencing back to the
original crossover curves, I'd do as few changes as possible.

Actually, I do have an extra set of crossovers to test, but it's true
that I don't know what the exact intentions of the designer were.

Thanks for your input. I feel like I'm getting close to a decision on
which way to take this whole project.

--
Steve Cohn