I can't figure out what's causing buzzing in my Laney amp

[Ademsan]

Hey all. I recently started having sound issues with my Laney Ironheart 60 amp. I noticed sometimes when I use the clean channel I get a kind of crackling (random pops), but on the gain channels (rhythm and lead) there was no issue. But recently I started having a buzzing sound on these channels, but only when a guitar is plugged. I made a video to document the issue:

So here's things I did to try to diagnose the issue.

1- Buzz sound:

• There's buzz only when a guitar is plugged in.
• Unplugging the guitar stops the buzz.
• The buzz is present with any of my guitars.
• Reducing the volume on the amp reduces the buzz.
• Reducing tone from the tone knob on my guitar significantly reduces the buzz.

2- Crackling/popping sound:

• On the clean channel there's crackling/popping sound.
• Plugging a guitar adds a buzz to the crackling.

Any help would be appreciated.

Thanks.

 

[huggygood]

🙂

 

[Netlist]

The buzz is present with any of my guitars.

This sounds very much like a bad cable having its shield damaged.

Hugo

 

[Ademsan]

This sounds very much like a bad cable having its shield damaged.

Yep. Turns out I had two faulty cables + interference from a wifi router in the same room.