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Ground is the wrong term today.

There is absolutely NO operational requirement for an audio circut to be connected to an Earth Ground. The term *ground* with regards to electronic circuts actually refers to circut Common return. With correct terminolgy, there then is no such thing as a floating ground. During the early days of crystal Radio, an actual Earth connection was required to boost weak Antenna currents. The old timers, out of habit, continued to refer to the circut Common return as a *ground* when active detection & amplification devices (vacuum tubes) became available. This continued use of a now erroneous terminology (circut Ground instead of Common return) is responsible for much confusion per circut operation today. Only a SAFETY Ground needs to be connected to the chassis, and at one point only, and separate from the signal or circut Common connection to chassis. Signal or circut Common should NEVER have a direct connection to AC Mains; only via the chassis lest SAFETY be compromised.

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