Peavey problem

[Two Leggs]

Good solutions.
I can’t figure out how the DI would get damaged. Most have a switch to engage (ground lift)when the hum occurs. If there’s no switch,
Then your solutions would come in handy.

No switch on amp’s DI— time for a new amp or separate quality DI.

It is possible to run on separate legs without hum. Much of my band room in my house is intentionally set up that way to balance the load st my panel. There loops raise their ugly head when the path or termination points of the grounding conductor are questionable.
This often happens when the ground and neutral are bonded at more than one point—- a common violation of the National Electric Code.

Seen that one more than once

 

[agedhorse]

This is not a tour situation, yes, I worked with big touring acts and tied in huge generators using all legs.that’s a different story when you’re in a club ,you do the best you can ,if you can’t get on the same leg if possible, if not, use a DI. I always carried a distro with a big breaker tied in the club myself. And had no issues , I’m older now stopped doing clubs and bands now i just repair broke sound gear. Good luck.

I’m still repairing amps with bad DI circuits from ground loops. That’s a different story ,some people believe , some people don’t

Again, being on the same phase makes zero difference since each piece of equipment has a power transformer and is electrically and galvanically isolated from each other.

If you don’t understand this, please don’t continue to spread bad information as fact because it’s wrong.

A DI is used for a different reason, primarily to isolate grounds to eliminate ground loops. This is regardless of the phase legs the equipment is connected to.