: also there is a tube driven overdrive pedal such as the Messa Boogie, hardly worth mentioning since it costs more than many tube starter amps. There are also those made by electro-harmonix http://www.ehx.com such as hot tubes, black finger and a few more, I believe eh’s tube pedals are tube driven but, have seen them hear and there online for much less than what the likes of musicians friend/guitar center, music123/woodwind& brasswood or bananas sell them on sale for. They seen good and hold up well the tubes are easy to come by. find something for little and try it if a store doesn’t have a demo unit.