Amp buzzing

Discussion in 'Amp Tech Center' started by OldAndNew, Sep 26, 2021.

  1. OldAndNew

    OldAndNew TDPRI Member

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    My 1979 Fender Deluxe Reverb is buzzing when I’m playing. I have tightened all the visible hardware and the nuts on the baffle (but not too tight). The buzzing is most apparent when playing a low g note but I can still hear it at most other frequencies. When I play the low g and lightly touch the cone, the buzz goes away mostly. If I touch any other part of the amp, the buzzing continues. I suspect the speaker itself (the stock Fender Special Design) is the problem.

    Is it okay/smart to remove the speaker from the baffle, plug it back into the output, and see if it still buzzes? Maybe it just needs to be re-coned

    Please advise. I don’t have much experience with amp maintenance.
     
  2. corliss1

    corliss1 Poster Extraordinaire Platinum Supporter

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    No, a speaker not mounted to a baffle won't sound right.

    Do you have another speaker or cabinet you could try instead?
     
  3. OldAndNew

    OldAndNew TDPRI Member

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    No cab but if this is an excuse to get one then that’s great.

    I could possibly try a Speaker out of my Champion 100. Not sure if impedance matches but I’ll check before.
     
  4. Wally

    Wally Telefied Ad Free Member

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    Can you run that Champion 100 through the DR’s speaker?
     
  5. ArcticWhite

    ArcticWhite Tele-Afflicted

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    Check the nuts on your power transformer and output transformer.
    I chased a buzz on my 73 Princeton Reverb for a week, till I found loose nuts on my PT.
     
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  6. Skyhook

    Skyhook Tele-Holic

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    I'd check the cabling between the guitar and amp.
    If you find one of these connected there, turn it off. :p

    [​IMG]

    </goofballing>
     
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  7. Jon Snell

    Jon Snell Tele-Holic

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    It is either seriously maladjusted/failed bias on the 6V6s or the speech coil is coming away from the former in the speaker. More than likely the latter as it is most pronounced at low volumes.
     
  8. OldAndNew

    OldAndNew TDPRI Member

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    Possibly. Just slide the connections off the champion speaker and connect the wires from the DR? Or is there a better way?
     
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  9. OldAndNew

    OldAndNew TDPRI Member

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    good idea. I’ll check that first.
     
  10. corliss1

    corliss1 Poster Extraordinaire Platinum Supporter

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    Nope - that's all there is to it.
     
  11. Wally

    Wally Telefied Ad Free Member

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    You will want to disconnect the speaker leads from the amp to the speaker in the DR before attaching the leads from the Champio 100. Simply pulling the speaker plug from the DR does this.
     
  12. tubedude

    tubedude Tele-Meister

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    If it is the speaker (most likely) it's a good reason to get a better speaker. If funds are shy you can try installing it upside down. Sometimes an old speakers weakened soft parts (spider and cone edge) droop with age causing a cone and coil alignment issues that can sometimes be corrected this way.
     
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