ARTEC Vintage Tone Controller Twin offers amazing powerful bass response and lots of crisp volume, yet still delivers super clear trebles and open-airy midrange. It is specially designed to eliminate the noise, so you can hear the natural "Tone-to-Tube" sound of your guitar. This circuit is like the Vintage Tone Controller w/single switch but offers a high & low switch for more control over your tones. See details for more info. Includes wiring diagram, washers & nut.