The One Control 1 Loop Box was developed to be the smallest possible true bypass loop switcher for one effects loop. With the painstakingly optimization and special arrangement of the PCB boards, One Control is the first manufacturer in the world who has succeeded in building such a small true bypass looper on a modern PCB basis. The design was developed with special care to create extremely small circuit boards that fit into the compact housing of the 1 Loop Box. In addition to the small size, the circuit was also developed to be more robust and durable than comparable switchers. The 1 Loop Box can be used for many different purposes. When the 1 Loop is operating in bypass mode, the input signal is sent directly to the output socket. If the pedal is activated, the input signal is routed to the send socket and the signal going into the return socket is sent to the output. As a result, in addition to the classic application as a true bypass loop switcher, the One Control 1 Loop Box can also be used as an A/B box, mute switch or input selector.