Electro-Harmonix Tube Zipper Distortion & Envelope Filter
Your guitar signal will be massaged by a complex set of filters moving through a vacuum tube maze. Energized by two Electro-Harmonix 12AX7 tubes, the Tube Zipper's patented moving filter tastefully adds controlled analog harmonics to your signal. Available at JetCityMusic.com.
http://www.jetcitymusic.com/index.php...