This is my first Marshall set up, I have an Origin 20 Head connected to a origin 2x12 cab, when I power it up it makes a loud buzzing sound for 5 seconds or so, I assume it's warming up., I have had tube amps like the Peavey Valve King, however it didnt make such a sound on power up. Is this normal?
Hello Christopher,
The ORI20H shouldn`t make a buzzing noise when powering up, we would recommend having the ampflifier checked over , please contact the dealer it was purchased through and they will be able to help you.
Kind Regards
Marshall Support