The Quiet Box 9 volt power filter & power distribution (compatible with Voodoo Labs, The One Spot, other 9 volt negative center adapters) This simple box cleans up the 9 volt power supplies output and in turn reduces noise in guitar pedals. Also works as a distribution box for the "One Spot" or "Sanyo pedal Juice  VooDoo Labs power supply while greatly reducing pedal noise. Works with any 9 volt negative center input. All 2.1mm connectors.