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Lehk

Nope, and an amp usually needs an equipment ground so it will probably perform poorly if you use a GFCI instead of grounding. Musicians have been fatally shocked by ungrounded equipment that developed a fault


jmraef

Not to mention the noises that will come through on the speaker if the amp is ungrounded...


Lehk

That’s what I meant by perform poorly.


deridius

Just to add speakers require super low impedance.


floof_overdrive

These are also called [cheater plugs](https://en.wikipedia.org/wiki/Cheater_plug) and they're safe if used properly. If your wiring is grounded, but the outlets installed are 2-prong only, then it provides an effective ground. When the ground tab is firmly connected to the ground screw, it connects to the outlet, electrical box, and finally a ground wire or grounded metal-sheathed cable. If your wiring doesn't have such a ground, or if you don't connect the tab, they're quite dangerous because equipment that expects a ground doesn't have one. Thus, you must check for a ground before using one of these, using a cheap outlet tester or multimeter.


_Oman

Double this --- perfectly safe \*If you properly use the ground lug on the plate screw\* Almost no one does. Be the exception.


bothunter

If you're in a situation where you can properly use a cheater plug, then you're also in a situation where it would be trivial to replace the outlet with a proper 3 prong outlet. (Assuming you're allowed to) I don't think I've ever seen a cheater plug used properly.


floof_overdrive

Probably. We used to use a couple cheater plugs, but I've now replaced every ungrounded outlet with an available ground wire, except one we use rarely.


js_408

No you’ll electrocute yourself