Quote Originally Posted by miker1 View Post
Each 890C crossover uses two 6uF and one 3uF caps. The switch controls three parallel resistors across the tweeter inputs. Not sure there's much sonic advantage to bypassing the switch. Also never seen a crossover schematic but you can find photos of the crossover from people that have recapped them.
Looking at the photo, the resistors connected to the switch aren't parallel. Each one connects to a different terminal. So each terminal appears to select a different series resistor for the tweeter.