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Grounding and Shielding Audio Devices - RANE Commercial
https://www.ranecommercial.com/legacy/note151.html#:~:text=Usually%2C%20metallic%20boxes%20are%20used%20to%20surround%20audio,electromagnetic%20fields%20in%20and%20out%20of%20the%20enclosure.
Grounding & Shielding Audio Devices
https://www.jhbrandt.net/wp-content/uploads/2014/11/Grounding_and_Shielding_of_Audio_Devices.pdf
modulate the ground where the shield is terminated. This also modulates the signal referenced to that ground. Normally great pains are taken by circuit designers to ensure “clean and quiet” audio signal grounds. It is surprising that the practice of drain-ing noisy shield currents to audio signal ground is so widespread.
Grounding and Shielding for your DIY Audio Projects
https://diyaudioprojects.com/Technical/Grounding-Shielding/
Use only one end of the shield inside equipment. If needed, run a separate ground wire to the volume control or where ever the signal is going. It will be the ground reference for the signal and the shields will be only shields. This can greatly improve the signal to noise in a piece of equipment. We still have three separate grounds.
An Overview of Audio System Grounding & Shielding
http://www.bennettprescott.com/downloads/grounding_tutorial.pdf
MYTH: Poor Shielding Causes Noise Common-impedance coupling causes 99% of noise problems in unbalanced interfaces Trivial noise contributor in modern systems Audiophile cables from famous maker, costing $80 to $500 per 1-meter pair, have no shield at all — wires are simply woven together! Shielding can be issue with old vacuum-tube
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