resonating 'c' note in 2x12 cab. Any ideas?

[Chuck H]

And yet another idea... Swap the speakers in the 2X12 cabinets and see if everything behaves.

[mfreqmaster]

I just know everyone wants closure on this, & I failed to post timely, so here goes: I don't have a function generator, but I do have a DAW. I just recorded the offending note on my guitar direct into the computer, then looped it & ran the output into my amp head. This allowed me to have 2 hands free to probe around. I found one of the handles was loose, which I was not able to find earlier. I really tightened this up & all is well.

[Chuck H]

I'm honestly not trying to be a jerk, BUT...

I said:

By "resonate" does mfreqmaster mean that the cab is vibrating loudly or that the cabinet seems to pronounce these notes loudly?!?

And then you said:

It pronounces the notes loudly...

How does a loose handle cause disproportionately loud bass notes in C?!?

I'm really NOT trying to be antagonistic. If you have other problems that need to be addressed (besides a handle vibration), we're here to help. No one should ever "settle" if they don't have to!

[mfreqmaster]

Well, maybe I thought the note was louder because of the vibration. There definitely was some vibration, I could feel it. It was just hard to feel it with a guitar in hand. Thanks for your help. I hate settling too. But so far I haven't been able to recreate the problem so I believe problem is solved.

[Enzo]

next time you have such a problem, apply some signal to make the buzz more or less constant. Roll up a magazine and hold the resulting tube up to your ear, then use it like a stethoscope to listen around the cabinet to hear just what is vibrating.

[Chuck H]

THAT WORKS! I've done it. Another trick (the one I use most often) is to use a wooden dowel pressed on the cabinet as a stethoscope. It's a trick I learned from a guy that troubleshoots engine problems! Great for getting ultra close to the vibration.