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hi. I have a used Marshall mg100 amp head only - I do NOT Have a speaker stack to run it through or even test it out……. I have a Line 6 1-12" combo amp…. is it possible for me to plug into the line 6 amp for speaker only - and not power up the line 6 amp? Just to test the Marhall head? I’ve never tried it before……and I don’t wanna blow either amp…….

Gregory Justice sounds unhealthy to run an amp through another amp. Something is going to fry on your Line 6 amp.