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both Mesa's buzzing at different areas of the room... need help fast plz!
Old 30th May 2006
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Jason Poulin's Avatar
🎧 15 years
both Mesa's buzzing at different areas of the room... need help fast plz!

Hey folks,

This is something new that just accured at the studio.

I am using a Mesa F-100 combo and a Dual Rec with 4x12 cab for recording.

My dad and I (we're both electricians)recently wired an isolated circuit/ground system for the whole studio... everything runs with absolutely no noise.


When I finally got around to plugin in the mesa's, they both now makes tons of buzzing noise... like a 600hz - 1khz area.

We tried pluging into only one, same thing.. upstairs, downstairs.... different guitars, you name it! It sounds like a ground loop would sound but it's not a ground loop. Everything in the studio is on the one split circuit we ran with the isolated ground.

And, they work fine at my house and in other live venues.


We shut all breakers in the house to eliminate any florescent lighting/dimmers/fridge/freezers in the path and still there.

I move around with my guitar and it gets better at certain places but still not to my likings. It gets a lot worse when I approach my amp's transformer with the guitar too... like big time! I use to be able to do this easily for getting good feedback tones.

This wasn't an issue last year when recording.

Is there some type of signal going through the house?

We're also using top knotch cabling.

Any advice is a appreciated! Thanks

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