i just recently bought a marshall valvestate 8100 head and cab. when i put it on OD2 i do an open palm muted chord in drop b and it makes a muffling, farty bucket sound and it is horrible, could it be the tube?
any help is welcome
i had a ****ty ashton before, the tube is on the inside of the amp head so i really shouldnt pull it apart then tap it while its on
Doesnt the 8100 only have one pre amp tube, im not familiar with how those amps sound but either its the way the amp is eq'd or it is your guitar.
that's good.

Can you close the amp up at all throw a blanket or something over it for now? I'm personally not familiar with that cab but my immediate response is ...meh...

Can you hook your amp up to a different cab and see what gives?