Hi crwilli,
I've not really considered changing the crossover caps in the mid/treble units. Doing so might possibly upset the tonal balance & I don't want to take that risk. They sound fine at the moment I'll let it be.
My main concern is for the bass servo unit, it can be replaced by a more modern crossover unit but it then looses the servo function. I do have a schematic (thats not very accurate) and electronic skills so I could effect repairs if necessary but with an ever ageing unit continued reliability is not a strong point.
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