Order code: 1012
Gold-plated Relays & Switches
The signal from the pickups of an electric guitar or bass is so weak that poor-quality cables, cold joints and cheap contact materials ruin your sound. Switch contacts need to be made of special materials to permit loss-free switching of these low-level signals. All Lehle switchers feature special relays and slide switches with gold-plated contacts for totally reliable, absolutely zero-loss switching.
Switching precise, swift and quiet
Swift and precise switching as between different instruments, effects loops or amps is essential in many live setups. To ensure this almost silently and wear-free, we have designed a finely tuned control system with a self developed spring located between the foot switch, our famous mushroom head, and the actual sensing device on the circuit board. A processor based on the ARM Cortex-M technology controls the switching operation very fast and precisely. While a conventional switch can handle a maximum of 20,000 switching operations, the interplay of the components used here enables a service life of 2 million switching operations. A hundred times more!
LEHLE Footswitch
The easy-action mushroom-shaped buttons characteristic of LEHLE products are mounted in the cover, so that your foot pressure is transmitted indirectly only, via a spring. Thus the electronics board is not exposed to mechanical loads, making your LEHLE virtually indestructible and guaranteeing years of trouble-free switching.
MIDI interface
By means of the MIDI interface, control information can be exchanged. All LEHLE products with the MIDI symbol are able to be networked with external equipment, in order to control it and/or be controlled.
No Hum Loops
All LEHLE products not featuring a LEHLE TRANSFORMER HZ transformer and bearing this symbol switch the signal ground parallel to the signal itself via switches or relays with gold-plated contacts. Hum loops are thus effectively eliminated when switching backwards and forwards between different signal sources without, for example, simultaneous activation of two amps.

The LEHLE 1AT3 SGOS is a programmable True Bypass switcher that lets you switch backwards and forwards between up to three amplifiers, when you want, as often as you want.
In combination with jack socket C→B, output C can also be used alternatively as an effect loop for amp B, excluding all the effects you don't currently need from the signal path. A tuner can also be connected to output A, taking it, too, out of the signal chain. The gold-plated-contact relays feature active pop-and-click suppression, and switch not only the signal, but also the signal ground, making hum loops impossible when switching back and forth between outputs A, B and C.
Like all members of the SGoS family, the LEHLE 1AT3 SGOS can also be programmed unbelievably easily and intuitively. The slender, TRS format remote socket assists with programming, and can be used, via a stereo patch cable, to communicate with other SGoS switchers, or for direct contact with MIDI controllers. The LEHLE 1AT3 SGOS can be programmed as a stand-alone unit, or remote controlled using MIDI program change commands.

Q: How do I program and use the MIDI functionality of the LEHLE SGoS pedals?
A: There is a blog article about the general procedure: https://blog.lehle.com/2017/09/27/how-to-program-a-lehle-pedal/
Q: What does SGoS stand for?
A: TRS socket for connection with other LEHLE SGoS switchers and external MIDI equipment for synchronization. SGoS switchers can receive MIDI program change commands and are very easy to program, they can also send MIDI program change commands and function as a MIDI controller.
Q: I can't hear any effects when activating the C->B loop on the LEHLE.
A: B must be switched off, otherwise the direct signal will overlay the looped signal.
Q: Is ist possible to use the outputs of the LEHLE 1AT3 SGoS simultaneously?
A: Yes, you can use the outputs of the LEHLE 1AT3 SGoS simultaneously, but when this is done in combination with two or more amplifiers, noises like hum or buzz can occur. We recommend using our LEHLE P-SLIT, to provide safe galvanic isolation on at least one of the signals via the LEHLE TRANSFORMER HZ transformer.
Weight 678 g
Length 103 mm / 4"
Width 156 mm / 6.1"
Overall height 47 mm / 1.9"
Supply voltage 8 - 20 V DC
Current consumption 97 mA
Number of FX Loops 1
Fuzz 2010.04
Mats Nermark
My sound was suddenly warmer, clearer and a lot more dynamic, wow ! As if somebody pulled the blanket off my speaker cabinet. If the D.LOOP SGoS was only a looper then Ikea is only a small furniture shop with a couple of chairs.
Gitarre & Bass 2008.08
Ebo Wagner
LEHLE 3at1, 1at3 & DUAL SGoS
Next generation of High-Tech-Signal-Routing : once again LEHLE stands out from competitors with the new revised product series. Something similar in regards of signal integrity, versatile and easy to handle in one, can't be found anywhere else on the market. Since the LEHLE switchers are mechanically super-solid and well made there can only be one conclusion : the price-performance-ratio is very healthy.

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I have the following questions on the product LEHLE 1AT3 SGOS (Order code: 1012)
Joachim Joki Schaller
Tel +49 2855 850070