TC Electronic G-System - Manual (Page 21)

Instrument Input
The Instrument input on the front of the GFX01 is
identical to the Instrument input on the rear. This is very
convenient when the GFX01 is mounted in a rack and
you wish to connect your guitar to the front.
Mounting the G-System in a Pedal- Flightcase
Though the G-System is built from heavy-duty materials,
you may wish to mount it in a flightcase for extra
protection on the road.
Therefore, the G-System’s side panels have four screw
threads (Ø 4mm).
Be sure to use the correct type of screws (M4) to
avoid damaging the threads.
OVERVIEW
19
You cannot connect guitars to both of these inputs
at the same time. Which input to use is set up via
the Input Select parameter located in the Global
Levels menu. - See also page 35.