Rattle on a G note

[amb2013]

I am at a loss of what is happening. Anytime I play a G note (doesn’t matter the octave) my amp rattles like crazy. Any ideas?

 

[Sands]

Nearby stuff? Cord against wall? Items in desk, on wall? I recently modded a cab and ended up removing the crossover, associated wires, etc. …still had a low g note flutter. I think it was some loose padding in the cab. I pulled all that crap out, vacuumed various particles. No more racket.

 

[jnewmark]

The amp head or the cab ?

 

[micguy]

There are a lot of things that can rattle in a cabinet - assuming it is the cabinet. Taking the back off the thing is often necessary to grab onto things to see if you can make it stop.

One of the toughest things to diagnose is air leaks - you hear what's clearly a mechanical sounding rattle, but it isn't - it's chuffing air from an air leak. A lot of cabinets with dual 1/4 inch jacks will do this if one of the jacks has no plug in it.

 

[beans-on-toast]

Does it do the same thing with a different bass? I had a bass that did this.

Try the cabinet in another room and see if you can repeat the issue there. It might not be the cab. Leave the head on the floor, away from the cab.

Check all the cabinet fasteners, including the speaker ones. Don’t over tighten the speaker ones. Seasonal changes can cause things to loosen.

Try sitting on the cab and reproduce the resonance. Rotate it onto another side, sit on it again. Repeat till all four sides are tried. Try pushing on different locations on the front.

 

[Mike Caldwell]

What model cabinet is it?

I'm going with something mechanical as well, loose screw, maybe a loose brace inside the cabinet, the grill on the cabinet, as mentioned an air leak.
There is a chance of a speaker issue, slight crack in the surround, the spider came unglued from the frame in a spot, the leads from the terminals to the cone.

Have you tried taking the cabinet outside to eliminate anything in the room from vibrating.
Also maybe look at getting a tone generator app or going to a website with on line tone generator, connect that to the amp sweep the tone to the frequency that causes the most the rattle, that will be easier to look / listen to the rattle then playing the bass at the same time.
Here's an on line tone generator I've used before when I did not have stand alone unit
with me.
Online Tone Generator - Free, Simple and Easy to Use.

 

[amb2013]

This is the current set up. I tried bypassing my pedal and going directly into the amp and it still rattled on me he G note. We recently tilted the amp back. It rattled before we did this.

 

[Old Garage-Bander]

View attachment 4865150 This is the current set up. I tried bypassing my pedal and going directly into the amp and it still rattled on me he G note. We recently tilted the amp back. It rattled before we did this.

That's a rattle room in the making. Like looking for a needle in a haystack.

As mentioned before, take the amp and bass somewhere else where there isn't a lot of stuff laying around that might vibrate, and see it you still have a rattle.

 

[amb2013]

That's a rattle room in the making. Like looking for a needle in a haystack.

As mentioned before, take the amp and bass somewhere else where there isn't a lot of stuff laying around that might vibrate, and see it you still have a rattle.

I will try that and see what happens.

 

[Old Fart]

In my experience, rattling sounds that seem surely to be coming from the cabinet, are actually caused by something else in the room that is rattling. 95 out of 100 times. At least.