First, remember that the electronics inside the boxes don't know or care what channel they are marked. They will do the job with equanimity. So, if the colored markings on the phono pre are inconsistent with the other components, simply ignore the colors and use the engraved R as right and L as left (or conversely, ignore the L and R markings and pretend that the black terminal is actually red. This would reverse the engraved markings; but as I say, the phono preamp doesn't care). The rumble filter (I assume KAB) only needs to have the connections consistent on the way in and out--so designate one side as red (R) and one side as white (L) and you are good to go. Finally, just to be sure you've maintained consistency throughout the connections, just listen to some familiar music--if the violin section in an orchestra is coming from the left, for instance, then you've conquered the mountain.
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