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  1. G

    Help with 1980's Mesa 4x12

    I disconnected the speaker that showed 20 and then connected the top left speaker. Now I have three working speakers so I am going to take the bad speaker for repair. I have to say it's sad to have to have the speaker repaired but working is better than original vintage I suppose.
  2. G

    Help with 1980's Mesa 4x12

    As best as I can tell it is wired as series parallel. One positive runs from the jack to the top right speaker from that negative terminal it goes to the top left positive terminal when looking at the back of the cabinet. There is a negative from the jack to the top left negative. This is...
  3. G

    Help with 1980's Mesa 4x12

    Thanks for the tips, I am going to do more digging after work and will post any findings.
  4. G

    Help with 1980's Mesa 4x12

    Hello, I am a new user here and wasn't sure where this goes, as I may have been to blind to find the guitar cabinet section. Anyhow, for some years now I have had an older 4x12 and the top two speakers seem to not function. The rundown: Top two speakers are original Black Shadow 150W(each) 8...
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