So my bass cab is making a wierd noise..
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EyesOfAnguishbassist
- Platinum Member
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- Location: Shade Gap
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So my bass cab is making a wierd noise..
Ok Im hoping I didnt blow my speaker (its a 15) but I dunno I dont think thats what it is. Whenever I hit a string and leave it ring out (it only seems like its only when i hit the top string too)it doesnt do it right away but after it rings out a bit it makes like a crackling noise but it isnt even that horribly bad, just enough that I notice and it pisses me off. Somebody told me it could be a loose wire even maybe.. Anybody have suggestions? Thanks!
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bassist_25
- Senior Member
- Posts: 6815
- Joined: Monday Dec 09, 2002
- Location: Indiana
You could possibly have a bad voice coil. I just recently had a driver replaced in one of my cabinets for the same reason. It started off very small and annoying until one night, I plugged it in and got nothing but static (thank God I was DIed to the front of house and could go without stage volume).
"He's the electric horseman, you better back off!" - old sKool making a reference to the culturally relevant 1979 film.
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onetooloud
- Gold Member
- Posts: 263
- Joined: Monday Aug 11, 2003
- Location: Johnstown
Remove the grill if needed then.
Tap around the edge of the speaker about an inch inside the surround area. Try different places on the cone and also perhaps tap softer and or harder. While tapping listen for a rattling or buzzing type noise. If you do this right and hear noise you need either a recone or replacement..
If it passes the tap test try to push on the cone near the voice coil. While pushing on the cone keep the pressure even on both sides of the voice coil. Push it in then allow it to come back out. Don't push so hard that you deform the cone just enough to move it. Its not going to move much. Listen for grating or grinding noises . You might even feel it rubbing. If this is also done correctly and you hear noise or rubbing you need a recone or replacement.
You can also use a 9 volt battery to test for an open voice coil, but that isn't likley to be your problem in this case. Use a 9 volt battery and some wires touch the wires to the speaker an battery for only a second. It should move and make sound not a pleasing sound, but noise. If not its voice coil is burnt or tinsel leads are broken.
If done correctly this can prove that you do have a driver problem.
There are other tests to prove these things such as a sweep test.
If you do find you have a problem I recone speakers and repair magnets.
Generally repairs are less than a replacemnet sometimes much less and operate as new.
Tap around the edge of the speaker about an inch inside the surround area. Try different places on the cone and also perhaps tap softer and or harder. While tapping listen for a rattling or buzzing type noise. If you do this right and hear noise you need either a recone or replacement..
If it passes the tap test try to push on the cone near the voice coil. While pushing on the cone keep the pressure even on both sides of the voice coil. Push it in then allow it to come back out. Don't push so hard that you deform the cone just enough to move it. Its not going to move much. Listen for grating or grinding noises . You might even feel it rubbing. If this is also done correctly and you hear noise or rubbing you need a recone or replacement.
You can also use a 9 volt battery to test for an open voice coil, but that isn't likley to be your problem in this case. Use a 9 volt battery and some wires touch the wires to the speaker an battery for only a second. It should move and make sound not a pleasing sound, but noise. If not its voice coil is burnt or tinsel leads are broken.
If done correctly this can prove that you do have a driver problem.
There are other tests to prove these things such as a sweep test.
If you do find you have a problem I recone speakers and repair magnets.
Generally repairs are less than a replacemnet sometimes much less and operate as new.