Marshal vs 8080 hissing

[Tahoeblues]

I have a Marshal Valvestate 8080 that recently developed a loud hissing noise in both channels. It seems to get louder as the gain is increased. It still...

[vegaluthier]

Hi, folks, last year I bought a 90's 8080 amp, and it worked fine, but last months it had a intermitent fail, suddenly went low volume and sounded distorted....