There is a little confusion in what "lifting a ground" means.
It’s perfectly safe to lift the signal ground. That is, the ground associated with RCA or XLR cables and plugs. Pro gear or devices with XLR inputs often provide this feature. It’s a very good thing and sometimes the most important reason to use XLR inputs.
The AC safety ground is not the same thing. It starts at the round middle pin on the AC plug and terminates at the metal chassis. Lifting, or removing the AC safety ground is NEVER a safe thing. Not all equipment requires it, but if they do, it should not be removed when present.
Cheater plugs originally had a good purpose. They were designed so you could screw the ground to the face plate screw on wall sockets without having to replace the entire receptacle. However, many of these receptacles weren’t grounded to begin with, so the screw was pointless, and no one uses it correctly anyway. :) So, effectively, @bpoletti is right. Leave them at the store. If you have 2 prong wall outlets then it is time to upgrade them anyway, as your wiring is probably 40-50 years old.
Best,
Erik
It’s perfectly safe to lift the signal ground. That is, the ground associated with RCA or XLR cables and plugs. Pro gear or devices with XLR inputs often provide this feature. It’s a very good thing and sometimes the most important reason to use XLR inputs.
The AC safety ground is not the same thing. It starts at the round middle pin on the AC plug and terminates at the metal chassis. Lifting, or removing the AC safety ground is NEVER a safe thing. Not all equipment requires it, but if they do, it should not be removed when present.
Cheater plugs originally had a good purpose. They were designed so you could screw the ground to the face plate screw on wall sockets without having to replace the entire receptacle. However, many of these receptacles weren’t grounded to begin with, so the screw was pointless, and no one uses it correctly anyway. :) So, effectively, @bpoletti is right. Leave them at the store. If you have 2 prong wall outlets then it is time to upgrade them anyway, as your wiring is probably 40-50 years old.
Best,
Erik