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Hi all, just wondered if anyone can help.

My GFs mum owns a Taylor electro acoustic which is pretty susceptible to picking up interference from certain lighting rigs. She currently plays through a Marshall acoustic amp, which has an output to a PA. Apparently it's fine during set up, but when stage lights are on it's picks up pretty hefty hum.

We're assuming it's an issue with earthing/ grounding as opposed to an issue with the amp/ guitar / PA but to be honest I'm pretty lost...

Any thoughts?

can she skip the marshall?

do a double check on the wires and plug in jack. it happens to me all the time

Pour beer on it?

No seriously as above - check all wiring, specifically if any earth wires have wriggled loose - the jack is a good place to start. I suppose one question here is has it ever NOT picked up hum? I.e has something definitely gone wrong rather than some 'nature of the beast' factor with that guitar?

I'm no expert with wiring Will but happy to take a look if you want - no promises I can fix it though!

Thanks for the responses guys.

I will definitely check all the wires for loose connections. I think the main factor is that there is no discernible hum with that set up until the lights in some venues are switched on. Ie in soundchecks it's fine, but once they're on stage it's a bit of an issue.

Yeah some types of light are killer for interfernce - my lizards UV bulb is a case in point! Maybe there's a way to give it extra shielding around the pup?

Hmm fair point. I'm going to do a bit of trial and error later to try and isolate the actual problem, will report back with findings.

Is the wiring shielded itself?

Shielded