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Audio Fundamentals
ends of the audio cable are active balanced.
Clean ground
Safety
An audio hum problem can be made to go away when a ground adapter is connected in series with a three-wire power plug, as seen in Fig. 6. It disconnects the ground conductor. This is a BAD choice for safety. The ground connection is there for a reason and should not be circumvented. Find another way to solve the problem. Active balanced audio works well in cases where both
Every studio facility should have a ground reference that is common to all studios in the building. A good way to do that is to establish a single-point ground in the engineering/equipment room. That should be a copper strap connected to an insulated #6 or better stranded cable that is run to the incoming electrical power panel with its associated ground rod or rods.
Heavy ground conductors should be run from the engineering/ equipment room to each studio. Fig. 7 shows an RG-8 coaxial cable with the inside and outside conductors brought together at the end. It makes for an inexpensive low-resistance conductor that is insulated along the cable route because of its non-conductive jacket. You don’t want the ground wire to
