Check the listing for details. Ghost Note Audio Swirls 80s Effect Chain Pedal EFFECTS - NEW - PERFECT CIRCUIT. Condition: New. Listed at 230.00 USD. In the 80s, big racks were all the rage, and guitarists would frequently stack effects in parallel to add more "thickness" to their sound. But this usually required multiple rack units and complex wiring systems to accomplish, with the end result being the size of an average fridge.