Name of jack, port or connector Explanation
INPUT

Connect your guitar here.
OUTPUT L/MONO, R Connect these to your guitar amp or mixer. If using a mono connection, use only the L/MONO jack.
PHONES Connect your headphones here.
SEND/RETURN

Connect an external effect processor here.

You can connect an external effects processor between the SEND jack and RETURN jack, and use it as one of the GX-100’s effects processors.
The sound that is input to SEND/RETURN within the effect chain will be output to the SEND jack. The sound that is input via the RETURN jack will be input to SEND/RETURN within the effect chain.

[GND LIFT] switch

This should normally be set to OFF. Noise may occur due to a ground loop when you connect an amp to the EXT LOOP (SEND/RETURN) jack. The noise may be eliminated if you switch to LIFT.
AMP CTL 1, 2

By connecting this to the channel switching jack of your guitar amp, you can switch channels from the GX-100.
CTL3, 4/EXP2

You can control various parameters by connecting an expression pedal (Roland EV-5: sold separately) or a footswitch (FS-5U, FS-6, FS-7: sold separately).

  • Use only the specified expression pedal. Connecting expression pedals made by third-party manufacturers may cause this unit to malfunction.
  • Refer to Connecting External Pedals for the footswitch (FS-5U, FS-6 or FS-7, sold separately) settings.
MIDI IN/OUT Connect an external MIDI device here.

ă (USB COMPUTER)

 Use a USB cable to connect to a computer and exchange audio/MIDI data between the GX-100 and the computer.
DC IN

Connect the included AC adaptor here.

  • Use the cord hook to secure the cord of the AC adaptor as shown in the illustration.

Ground terminal

 Connect this to an external earth or ground. This should be connected when necessary.