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Author Topic: Amps buzzing in a newer venue  (Read 874 times)

Kemper Watson

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Amps buzzing in a newer venue
« on: August 08, 2021, 01:34:52 PM »

I know this has been discussed but I just wanted to maybe start a thread on what to look for in this situation with main causes and what can be done. I had a friend call me from Fla this weekend from a wedding type venue and had this issue. Maybe make this or start a sticky thread on problems and solutions?
 It was only the guitar amps . I was told that they had three prong connectors. All were tube amps
Thanks in advance
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John Roberts {JR}

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Re: Amps buzzing in a newer venue
« Reply #1 on: August 08, 2021, 02:28:52 PM »

Guitars are high impedance, so perhaps a noisy magnetic field from fluorescent lamps?

Of course building wiring is always suspect.

JR
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Kemper Watson

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Re: Amps buzzing in a newer venue
« Reply #2 on: August 08, 2021, 04:24:49 PM »

Guitars are high impedance, so perhaps a noisy magnetic field from fluorescent lamps?

Of course building wiring is always suspect.

JR

He texted after I posted this. The lights were a big part but it never really went away. Once the lights were dimmed the buzz went to about half. .
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Brian Jojade

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Re: Amps buzzing in a newer venue
« Reply #3 on: August 08, 2021, 09:31:04 PM »

Were the guitars plugged in when the buzzing happened, or was it just the amp on its own?

The type of lighting in the venue can make a big difference.  Some LED lights output a huge amount of hash that single coil pickups in guitars can't handle.  Not a whole lot you can do about that short of building a faraday cage around the stage.
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Jordan Wolf

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Re: Amps buzzing in a newer venue
« Reply #4 on: August 10, 2021, 08:45:46 AM »

Hmm...any neon signs close-by?
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Tim McCulloch

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Re: Amps buzzing in a newer venue
« Reply #5 on: August 10, 2021, 10:26:07 AM »

If you get dimmer noise in amps, likely there's a bootleg neutral/ground bond someplace.
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Kemper Watson

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Re: Amps buzzing in a newer venue
« Reply #6 on: August 14, 2021, 07:18:49 AM »

If you get dimmer noise in amps, likely there's a bootleg neutral/ground bond someplace.

I bet that's it.
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Jordan Wolf

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Re: Amps buzzing in a newer venue
« Reply #7 on: August 14, 2021, 11:53:50 PM »

If you get dimmer noise in amps, likely there's a bootleg neutral/ground bond someplace.
Subpanel feeding the stage?
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Jordan Wolf
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John Roberts {JR}

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Re: Amps buzzing in a newer venue
« Reply #8 on: August 15, 2021, 10:50:46 AM »

If you get dimmer noise in amps, likely there's a bootleg neutral/ground bond someplace.
Neutral/ground bonds away from the power panel (to grab a bootleg ground) are ill-advised and can be dangerous for multiple reasons. Increased chassis ground noise is only one of those several reasons.

Chassis/safety grounds are far from clean audio grounds.

Guitar pickups/amps are high impedance so susceptible to electrical interference (noise).

JR
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Re: Amps buzzing in a newer venue
« Reply #8 on: August 15, 2021, 10:50:46 AM »


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