JetCityMusic | 1 decade ago

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?page=shop.product_details&flypage=vmj_naru.tpl&product_id=527&category_id=43&manufacturer_id=10&option=com_virtuemart&Itemid=89