long power cable run

[billfitzmaurice]

I made the mistake one time of using a 100-foot 16X3 extension cord to run the whole band. The stage amps and PA kept dying out on loud passages. I was lucky not to lose some gear over that.

That's a common scenario with lawn party gigs, where the person putting it on is totally clueless. But cluelessness isn't the exclusive purvey of amateurs.
A major venue I consulted for installed remote towers. They put the power amp rack with three Crown Macro-Tech 3600s in the FOH, told their electrician to add a dedicated outlet for it. He did: 110v/20a. The first show they did with them they wouldn't run more than 2 minutes before popping the breaker, essentially shutting down with every hard hit on the kick. After re-setting the breaker six times I turned off the LF amp. They went the rest of the show with only the mids and highs, but luckily the LF output from the main arrays was adequate to do the job. The next day that 110v/20a outlet was replaced with a 220x50a sub-panel.

 

[Bob Lee (QSC)]

I made the mistake one time of using a 100-foot 16X3 extension cord to run the whole band. The stage amps and PA kept dying out on loud passages. I was lucky not to lose some gear over that.

That's not a good way to run a show, but it would not be a likely cause of gear damage.

 

[Munjibunga]

But ... you just look so damn smart in your avatar pic!

If not smart, at least self-confident.

 

[ulrich]

That's not a good way to run a show, but it would not be a likely cause of gear damage.

If Bob says your audio gear is safe, you can bet it's safe, however:

Off Topic: Undervolting electric motors, in this manner, will reduce their lifespan. Though frequently unavoidable, I try not to run my 15amp Skillsaw, under similar conditions.

IME robotic lights, on severe undervolt, pop their fuses. Though in this case they'd been plugged in to a dimmed circuit, not a long, thin cable.