G-Lab GSC-4 User Manual - page 29
28 user manual GSC_4
Connecting a typical volume pedal instead of an expression pedal requires the use of a -“Y”- type cable.
The RING cable should be connected to the INPUT (or INSTRUMENT input) and the TIP cable should be
connected to the OUTPUT (or AMP output)
5.2 Amp channel / function switching:
The diagram below indicates the layout connections of the SW1&2, SW3&4 and SW5&6 outputs.
SW1-6 OUTs are used for controlling the amp channels as well as other functions,
e.g. the amp’s built-in reverb.
G LAB consults with amp manufacturers in regards to their proprietary wiring of amp controlling/switching.
Information can be found in our website www.glab.com.pl which explains how to control a given amp
model and what cable or adapter is required. Many amps are equipped with a
¼’ female Jack( footswitch
input). If your amp is equipped with such type of connector, please check on www.glab.com.pl or ask
your dealer and amp manufacturer if it is possible to connect and control your amp directly (with mono
or stereo Jack/Jack or Y type cable) by using relay outputs.
Warning! DO NOT CONNECT THE SW1&2, SW 3&4 and SW5&6 OUTPUTS TO THE
EXTERNAL SWITCHING INPUTS OF THE MESA BOOGIE AMPS. To control these
types of amps use G LAB MIDI AMP CONTROLLER MAC-4.4 (product code 00876).
5.1 Expression pedal wiring:
The expression pedal must be passive (preferably with a potentiometer in the range of 10k ohm to 100k
ohm) and feature a TRS connection as shown in the picture below.
The SWITCH outputs are galvanically isolated in order to avoid ground loops. It is recommended to use
connectors with A plastic shielding to avoid accidental connection with signal grounding.