AMMO nite The AMMO nite is based on two Mosrite Ge Fuzzrites that I own. red : 6623 This pedal is based on my Fuzzrite Ge. With a pot code of 6623 (which dates it to the 23rd week of 1966). blue : 6647 This pedal is based on my Fuzzrite Ge. With a pot code of 6647 (which dates it to the 47th week of 1966). Differences Between 6623 and 6647 6623 has a lot of bottom, 6647 has more high mid, and 6647 has a little more gain than 6623. SOUR Switch This switch gives you a more gated sound, and more bottom end when engaged.Use the center position as a base, and adjust the switch to the left or right to explore the effects of the SOUR switch. Power Jack The AMMO nite works with center plus 9V DC adaptor (tip-positive). Please note that the power supply cannot be shared (daisy chained) with pedals that use a normal center-minus 9V power supply, but it can be used with an isolated power supply.