Invitation to Sam Ash Tuesday Night Guitar Jam and a demo of the Catalinbread Naga Viper Treble Boost or Booster pedal, using both a heavy duty 9V battery AND a more consistent 9V lithium ion power supply, the Sanyo Eneloop. Next time, I’ll also compare to an Alkaline battery. I think the heavy duty is the grooviest and sounds the best when it sort of “gives up“! You can also power the pedal with an 18V power supply, but I think I like the saggy, lower voltage, fuzzy sound.