The LEHLE 1AT3 SGOS is a programmable True Bypass switcher that allows seamless switching between up to three amplifiers at your convenience. Additionally, with the jack socket C→B, output C can serve as an effect loop for amp B, removing unwanted effects from the signal path. It's also possible to connect a tuner to output A, thereby removing it from the signal chain.

The switcher's gold-plated-contact relays, equipped with active pop-and-click suppression, switch both the signal and the signal ground, preventing hum loops when alternating between outputs A, B, and C. As part of the SGoS family, the LEHLE 1AT3 SGOS boasts easy and intuitive programming. Its slim, TRS format remote socket aids in programming and, through a stereo patch cable, enables communication with other SGoS switchers or direct interaction with MIDI controllers. The LEHLE 1AT3 SGOS can operate as an independent unit or be remotely controlled via MIDI program change commands.