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When i plug in my bass guitar into my amp it just makes a rapid thumping noise and makes no sound from guitar, but when i plug in my electric guitar it works just fine. Can anyone help?

  • Does the bass guitar have active circuitry - i.e. do you have to put a battery in it?
    – Laurence
    Commented Nov 17, 2017 at 0:42
  • No I do not have to. Commented Nov 17, 2017 at 0:46
  • 4
    This is actually a problem with the bass, since the amp works fine with the guitar. Can you maybe edit in a picture of the bass and/or more information about the bass itself? What model is it? Commented Nov 17, 2017 at 1:34
  • Does the "rapid thumping noise" repeat itself or only occur once, when you plug it in?
    – user43681
    Commented Nov 17, 2017 at 9:03

2 Answers 2


A process of illumination is needed here (throwing light on the problem...).

You need to establish first if it's actually the amp or the bass. You've got half way there, as the guitar seems to work with the amp. Next to eliminate is the bass, by plugging it into a different amp. If it still doesn't work, then chances are it's the bass.

You've already (maybe) eliminated the lead (cord, cable), by using the same one for each, and if so, and it worked with guitar, it's not the lead. Even so, try another lead with each, so you know.

If it comes down to the bass only that doesn't work, it's more than likely the jack socket in that bass. Needs taking out and checking and re-soldering. Often a solder joint looks fine, but has become what's called a dry joint, remedied by re-soldering.


Check if the bass has problem with the jack output (it's one of the most common things to break on electric instruments). In that case you'll have to solder a cable or two.

  • Not sure why this was down-voted - it's very good advice. Perhaps you should explain a bit more - how do such a check, more details about how to go about fixing the problem, etc.
    – Stinkfoot
    Commented Nov 19, 2017 at 4:31

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