Fender rumble buzzes when treble is turned on

[xdanxx]

Ive had my fender rumble 100 for a good 6-7 years, and now for some reason it has a problem now of buzzing uncontrollably unless I turn the treble completely off on my eq. Once I give it some treble it buzzes again. The problem seems to come and go, and when its having the issue the severity fluctuates when I move around or get closer to my amp.

Its not the bass or the cord, since they work flawlessly on other amps. However, once I disconnect my bass the buzzing stops.

Any ideas what it could be?

 

[RickenBoogie]

Sounds like it's your bass. maybe a loose ground wire.

 

[ksandvik]

Sounds like it's your bass. maybe a loose ground wire.

See first posting, especially mentioned that the bass and chord works fine with other amp.

But it could be grounding in the input jack that is loose or have a bad soldering job, not uncommon for low-cost products like Rumbles.

 

[xdanxx]

like ksandvik said, its definitely not my guitar because it works fine on other amps. Ive also tried plugging different guitars into this amp and they have the same problem.

Should I just assume the amp is toast? It would probably cost as much to fix then this amp is worth id assume. The worst part is it comes and goes, so i'm having a hard time justifying getting rid of it. But my fear is it will have an issue during a gig.

 

[B-string]

Input jack are $6.50 I think from Invalid Link Removed plus 3.95 shipping. 1/2 hour labor most likely. Input jacks going dodgy are common.