Most audio pros know that a well soldered connection is much more reliable than a mechanical connector like a crimp on terminal. Solder joints are not subject to failure from things like vibration and don’t normally weaken over time.
Apparently a section of the electrical code that refers to connectors like Powercons says that grounding terminals on power cables can’t be soldered, but must use a mechanical connection. The primary argument is that an overheated solder connection can fail, leading to an ungrounded circuit.
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