Lehle D.Loop SGoS is a loop switcher with two effect loops, A/B. The loop switch is true bypass, so if you turn off the loop, the signal will be output to the amplifier as is. In addition, the loop has a stereo specification using TRS. Additionally, if there is a possibility of signal degradation at the input or output, you can choose to use an input buffer, where you can boost up to 12dB. Three modes can be used for loop selection; mode 3 allows program change control (sending and receiving) via MIDI, and multiple Lehle SGoS pedals can be linked using this. A relay with gold-plated contacts is used to switch the signal, and a highly durable micro switch is used for the foot switch for excellent durability.