Order code: 1010
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.
Hum loops and phase cancellations can occur as soon as the signal from an instrument is fed to more than one amp simultaneously. The one and only remedy for this is a high-quality transformer. Standard transformers modify the tone of electric guitars and basses very severely, since they are not designed to handle the low-strength high-impedance signals generated by instrument pickups. The LEHLE TRANSFORMER HZ, on the other hand, has been specially conceived for use with these high-impedance signals, preserving instrument tone and the interaction between instrument and amp and eliminating hum loops.
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.
Adjustable Gain
Adjustment of volume or distortion using a gain controller is a vital feature in many situations. The gain controllers on the corresponding Lehle products feature black anodized aluminium knobs set back into the housing so that they can be easily fingertip rotated but keep their settings during performances and transportation.
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.
Many effects units feature stereo outputs. Or: instruments frequently have two pickup systems, e.g. a combination of conventional magnetic and Piezo types, to emulate an acoustic sound. Lehle accessories are ideal for trouble-free routing of such dual-channel stereo signals. All stereo-capable Lehle products are, of course, also suitable for mono operation.
Balanced Output
Equipped with a standard TRS-socket for balanced output signals if needed.
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 DUAL SGOS is the second evolutionary stage of the highly successful programmable switcher for two amps plus tuner. This unit makes it possible to play through two amplifiers individually or simultaneously, either as a stand-alone unit or in a network with other Lehle SGoS switchers. A particularly popular combination is the LEHLE DUAL SGOS with the LEHLE D.LOOP SGOS. Programming is as easy and intuitive as you would expect from a Lehle product, and can also be done remotely, using MIDI program change commands. Hum loops are completely excluded, thanks to electrical isolation of outputs A and B by the LEHLE TRANSFORMER HZ high-end transformer. Gold-plated-contact relays, ground switches and phase inverters assure the full, loss-free guitar sound. The potentiometers are in the signal path when output A and B are active simultaneously, and the volume of the two amps can be balanced - producing a third sound you've never heard before! Output T, basically intended for instrument tuners, can also be used for a third amp or for a second channel for amp B, opening up even more potentials. The gold-plated-contact relays feature active pop-and-click suppression, outputs A and B can be muted for undisturbed instrument tuning. Welcome to the new Duality!

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: Which function do the volume controls for A and B have?
A: With these controls you can balance the volumes of the 2 amps to create a mix-sound as soon as A and B are active at the same time. Without these controls the Y-sound would probably be too loud, so this is a very helpful feature.
Q: What is galvanic isolation?
A: Background noise, generated by ground loops, occurs again and again when two electronic devices are connected to each other, and the LEHLE P-SPLIT III provides a simple but extremely effective remedy when installed between the two units. The two devices are galvanically isolated when the 'ISO' output is used, eliminating this background noise.
The protective earth conductor and the ground connection of the audio signal create a loop which will pick up external interference generated, for example, by coils. Such interference will impair the signal. The LEHLE TRANSFORMER HZ transformer included in the LEHLE P-SPLIT III galvanically isolates the ground connection. The hum loop is thus broken at this point.
Q: Can the LEHLE DUAL SGoS be used as DI box since it has 1/4" sockets?
A: Yes, you get a balanced or unbalanced (mono-) signal from transformer-isolated output A when using a stereo (TRS) cable.
Q: Does the galvanic isolation color my sound?
A: No, neither sound nor dynamics will be altered, the signal is passing the switcher without any loss in strength or frequency. We use our self-developed LEHLE TRANSFORMER HZ transformers for this, the selection of high quality components guarantees a rich sound throughout the full frequency range.
Weight 748 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
Bonedo 2012.10
Thomas Dill
Champions League
First class! The processing is top, the components are of the highest quality, the soundquality is very well and the concept is unbeatable.
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 DUAL SGOS (Order code: 1010)
Joachim Joki Schaller
Tel +49 2855 850070