Especially in ch. 2 more the noise is terrible with the least amount of gain and volume. Speaker cab keeps sounding like you are unplugging under power. I was excited about getting a new Marshall but so far I am disappointed. Any help is appreciated. It's not as bad on green channel but still very noisy the more gain and volume you add. None of my other amps do this, two Line 6 Spider V 240's and a Fender Champion 100.
Hello David,
From your description it sounds as though this may be being caused by a pre amp valve, as you have just purchased the amplifier and it is under warranty we recommend that you contact the dealer you purchased it from.
Kind Regards
Marshall Support
