Electro-Harmonix is not only an effects pedal pioneer but we are the leading manufacturer of vacuum tubes in the world. Put the two together and we are proud to present a line of vacuum tube pedals that take full advantage of the sweet, warm, lush sounds that vacuum tubes are known for. In all of our vacuum tube pedals, we run the pedals at full power with approximately 300VDC on the plates giving the tubes a chance to shine in a relatively small guitar pedal footprint. Now you don't need to search the far reaches of the Internet for deals on vintage tube amps and studio gear to get a real tube sound.