Why did the hum stop? MXR bass di+

[OOD]

This is kind of a half amp half effect question.

My amp was humming our buzzing or whatever you want to call it. Why did it disappear when I plugged in though my MXR bass di + distortion?

I don't really have a problem, just wondering if anybody can explain it to me.

 

[DiabolusInMusic]

Was the amp humming/buzzing without anything connected to it? Does the issue persist or has it ceased?

 

[OOD]

Was the amp humming/buzzing without anything connected to it? Does the issue persist or has it ceased?

Yes there is a hum when nothing is plugged in and it gets worse when I plug my pedalboard in. I just happened to put the mxr di on my board and it stopped.

 

[DiabolusInMusic]

Yes there is a hum when nothing is plugged in and it gets worse when I plug my pedalboard in. I just happened to put the mxr di on my board and it stopped.

That is quite bizarre. This is well over my paygrade, sorry. I am really curious to hear why this may be though.

Does it stop if you just use the DI + distortion only without the rest of the board?

 

[OOD]

Does it stop if you just use the DI + distortion only without the rest of the board?

Yep. I tried plugging it in solo first.

 

[jloftin1]

You probably have a grounding issue that is solved with the ground lift switch on the mxr. It may be on and you didn't know it.

 

[OOD]

You probably have a grounding issue that is solved with the ground lift switch on the mxr. It may be on and you didn't know it.

I thought that at first, but the weird thing is, it stops the buzzing no matter what way I have the ground lift button.

 

[jloftin1]

Well I'm stumped then. Enjoy the happy accident. Does it do it with just the bass plugged in?

 

[OOD]

Well I'm stumped then. Enjoy the happy accident. Does it do it with just the bass plugged in?

Yeah it does it with just the bass plugged in. It's not as bad with just the bass plugged in, but it's just bad enough to be annoying. I was getting ready to put the MXR into storage. I'm glad I didn't.

 

[bringitlow]

Hmm, could it have something to do with the built in noise gate on the MXR?

 

[AndyLES]

Orrr....the buffer in the DI is somehow isolating the signal? Beats me.

 

[OOD]

Hmm, could it have something to do with the built in noise gate on the MXR?

I doubt it. The gate is only on the distortion.

Orrr....the buffer in the DI is somehow isolating the signal? Beats me.

This might be what's happening.

 

[Milo Spleen]

Active, or Passive bass?

 

[OOD]

Active, or Passive bass?

It's passive.

 

[BAG]

I thought that at first, but the weird thing is, it stops the buzzing no matter what way I have the ground lift button.

I was going to say the same thing about the ground lift but this just makes it very weird.

 

[Hypocrite]

You probably have a grounding issue that is solved with the ground lift switch on the mxr. It may be on and you didn't know it.

I thought the ground lift switch only made a difference when using the XLR out?

 

[newfuture]

I thought the ground lift switch only made a difference when using the XLR out?

This should be the case. If it's like most DIs out there, it just connects Pin 1 of the XLR to the signal/amp ground when it's not lifted, or remove it from that ground when it is.

 

[Old Garage-Bander]

This is kind of a half amp half effect question.

My amp was humming our buzzing or whatever you want to call it. Why did it disappear when I plugged in though my MXR bass di + distortion?

I don't really have a problem, just wondering if anybody can explain it to me.

DIs usually have an isolation transformer. Iso tranfmrs go a long way towards mitigating most hum issues.

 

[Jazz Ad]

I would say the noise gate in the pedal does its job of gating noise, which means the noise comes from the bass or pedalboard, not the amp.
Ground switches only act on the di part and have no effect on the amp input.

 

[kulit17]

Why did the hum stop?

Because it finally remembered the words!!

***drum roll***
***drops mic****
Then walks away from thread
*carry on!!!