"This guitar features the new-for-1959 рRic-o-soundс dual output-jack systemяone output was mono and the other stereo. Ric-o-sound became part of the deluxe package of Rickenbacker guitar features and remains so today. A special wiring unit was available as an accessory to enable players to take advantage of the stereo output, so each pickup could be routed to a separate amp or amp channel. "