Check the listing for details. One Control Minimal Series White Loop With BJF Buffer - A/B Switch / True Bypass. Condition: New. Listed at 108.62 USD. The One Control Minimal Series White Loop is a dual-loop true bypass switcher that offers guitarists the ability to quickly switch between both loops or immediately switch both loops to bypass. The left footswitch switches between the active loops (Red or Green) and the right switch deactivates both at the same time. This is a handy tool if you want to quickly change channels and don't need a complex switcher system. As with the Black Loop, two DC barrel connector outputs are available for looping through the power supply. The White Loop can also be used as an A/B switch with mute function - you simply connect an amp to the send of the Red Channel and an amp to the send of the Green Channel and you can switch between the two amplifiers with the left footswitch. The pedal can also be used a.