I found this on the Marshall Forum, instructions on how to setup a Boss ME 70 using an amp's effects loop:
I would plug your guitar straight into the input of the MA50.
Then plug your amps FX Loop (OUT) into the GUITAR IN of your BOSS ME-70, then plug the GUITAR AMP OUT (L.MONO) of the BOSS ME-70 into the FX Loop (Return) of your amp.
Does this setup apply to all multi effects pedals or is it just the ME 70?
I would plug your guitar straight into the input of the MA50.
Then plug your amps FX Loop (OUT) into the GUITAR IN of your BOSS ME-70, then plug the GUITAR AMP OUT (L.MONO) of the BOSS ME-70 into the FX Loop (Return) of your amp.
Does this setup apply to all multi effects pedals or is it just the ME 70?