Long-press this button while the play screen is displayed to turn the lock feature on/off. This feature prevents the knobs or buttons from being accidentally operated when you’re playing.
Press both switches at the same time to change the FSW mode (footswitch mode).
The indicator colors and illumination change according to the functions that are assigned to the [É/1] , [Ç/2] switches.
Rear panel
INPUT L/MONO
Connect your guitar or the output(s) from an external effect unit here.
When connecting the outputs from a stereo effect unit to the inputs of this unit, connect the jack for the L channel signal here.
INPUT R (RETURN)
Connect the jack from the stereo effect unit for the R channel signal here.
When using the send/return feature, connect the output from the external effect loop here.
OUTPUT L/MONO
Connect this to the input of your amp or an external effect unit. If using a mono connection, connect only to the L/MONO jack.
When connecting to the inputs of a stereo effect unit, connect to the input jack for the L channel.
OUTPUT R (SEND)
Connect this to the R channel input jack of a second amplifier or stereo effect unit.
When using the send/return feature, connect to the inputs of the external effect loop here.
CTL1(3),2(4)/EXP jack
Connect an external footswitch or expression pedal here.
MIDI OUT/IN
Connect an external MIDI device here.
Connect the MIDI OUT to the input of an external MIDI device. Connect the MIDI IN to the output of the external MIDI device.
USB
Use a USB cable to connect to a computer, for exchanging MIDI data between the EX-4 and the computer.
DC IN
Connect the included AC adaptor (PSA-S series) here.
The DC IN jack also serves as the power switch. The power turns on whenever a plug is inserted into the DC IN jack, and turns off when the plug is disconnected.
Ground/earth connector
Connect this to an external earth or ground. This should be connected when necessary.