My amp is making this really loud sound.

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User avatar India
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Joined: Tue Dec 18, 2018 10:25 am

My amp is making this really loud sound.

Unread post by Henrryparth » Tue Dec 18, 2018 10:29 am

So I have a Marshall valvestate 8080 which is 25 years old (got it from my dad), and whenever I turn it on Movies series world it makes this really loud low frequency humming/buzzing sound. When I first got it and turned it on it made te sound, but the second time it worked fine, until last week when it has started to make the sound every time I turn it on. The sound doesn’t stop after a few seconds and just stays, so the amp is practically unusable. I really love the amp but am short in money at the moment so does anyone know a way to fix it without taking it to a professional. If anyone even knows what is the reason for it making the sound that would be super helpful..
Last edited by Henrryparth on Wed Dec 19, 2018 6:58 am, edited 1 time in total.
User avatar Great Britain
Les Turnbull
Posts: 117
Joined: Sun Jan 13, 2013 7:30 pm

Re: My amp is making this really loud sound.

Unread post by Les Turnbull » Tue Dec 18, 2018 11:23 am

Best let someone qualified fix it , Loud buzz usually means one of the big 400 volt capacitors has shook loose or dried out . They must be discharged before touching them .
User avatar Ireland
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Re: My amp is making this really loud sound.

Unread post by Saul » Tue Dec 18, 2018 5:36 pm

Yeah got to be careful with this because as Les said, those capacitors need to be discharged before you do anything. You CAN normally discharge capacitors yourself using a multimeter or screwdriver but with something like a 400 volt unit you really need a proper discharging tool because these things are incredibly dangerous!
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