Cammy

Hi folks, looking for some opinions...

Ok, so we're playing at a mega posh hotel in the centre of Edinburgh last night, £50 a ticket black tie job, gig is going really well, we'd been playing about an hour and a half, then suddenly the loudest most horrible noise ever comes through the pa......holy ****, it was horrendous!

It wasn't feedback, it's quite hard to describe, it was like a continuous electrical krrrrrrrrr noise (if that makes sense!).

I put the master faders right down and slowly put them back up....still there. Back down again, waited a minute, treid again and was gone.
The volume of the noise was incredible, the punters **** themselves!

So, checked all the connections, all fine, carried on.

End of the gig, ipod in, playing a mix whilst we broke the gear down, happened again.

This time, switched the mixer & power amp off for a minute, back on, had stopped.

So, does anyone have any ideas what on earth this was???
Obviously we're going to have to replace gear, but is it the mixer or the power amp or something else? Replacing them all would be expensive, so would be hand to isolate which one it would be.
I know that's mega hard to answer without seeing / having gear checked over, but wondered if someone hear had experienced this before and could speak to what it might be?

Here's our rig:

2 x Peavey Pro 15
2 x Peavey Pro Subs
t.amp TA2400 MK-X
Behringer 2222fx mixer

Thanks guys :-)

Chula Vista

Sounds like a ground connection in the amp has gone bad. Was the noise kinda like when you have a guitar cable plugged in (to the amp but not to the guitar) and then you touch the end that would go into the guitar?

BRRRRRRRRRRRRNG

__________________

“The fact that we live at the bottom of a deep gravity well,
on the surface of a gas covered planet going around a nuclear fireball 90 million miles away
and think this to be normal is obviously some indication of how skewed our perspective tends to be.”

Cammy

Sounds like a fair description mate. Easy fix you reckon?

Chula Vista

If it's a loose ground then maybe yes, maybe no. Do you know anyone with electronics experience?

What you could try yourself is unplugging the amp, let it sit for a couple of hours (to make sure all of the capacitors have bled off) and then checking the mains ground. Right where the plug enters the chassis there should be a (normally green with a colored stripe) wire with a lug on the end that'll be screwed down to an unpainted portion of the chassis. Check to see if that's loose.



If it's not then find yourself a tech!

__________________

“The fact that we live at the bottom of a deep gravity well,
on the surface of a gas covered planet going around a nuclear fireball 90 million miles away
and think this to be normal is obviously some indication of how skewed our perspective tends to be.”

The Batlord

I say keep the gear as is and become a power electronics band.

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Chula Vista

Definitely.

__________________

“The fact that we live at the bottom of a deep gravity well,
on the surface of a gas covered planet going around a nuclear fireball 90 million miles away
and think this to be normal is obviously some indication of how skewed our perspective tends to be.”

The Batlord

Your new avatar must be a necromancer.

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oneflightup

grounding?

Nick