MIDI 4 X LOOP allows to add four additional effects loops to the guitar system. MIDI 4 x LOOP (abbreviated to M4L) is an effects loops switcher controlled by MIDI interface or manually, by using the buttons. Controlling takes place by Program Change and Control Change commands. Using the MIDI commands it is also possible to mute the signal (e.g. for silent tuning). M4L should be controlled by programmable MIDI controller (which enables to program and to send any command of PROG CHANGE or CTRL CHANGE for a given tone and preset). It is recommended to use M4L switcher as an extension of functionality for the G LAB guitar system controllers GSC.

Examples of the M4L use:


Scheme of M4L connection to the amp effect loop



Scheme of adding four effects loops to the GSC controller

Scheme of the system with the M4L switch connected to the amp input and the GSC in the effects loop

four bypassed (by electro mechanic relay) loops to connect the pedal effects or serially connected sets of effects
power supply and loop switching indicators
four buttons for manual on/off switching of loops
use of muting system based on opto elements
possibility for silent switching on/off
MIDI THRU connector to connect other MIDI devices
stabilized power supply unit (9V DC, max. power consumption 100 mA)
powder-coated casing made of the sheet steel
dimensions (depth x width x height):
270 x 70 x 38 mm
0,6 kg