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What is a dedicated line?

by Nyal Mellor April 08, 2013

A dedicated line is an electrical circuit used solely for the purpose of supplying power to an audio or video system. No non-AV equipment should be connected to a dedicated line. The line runs back to the main service panel or a sub panel. A single high performance room may be fed by a number of electrical circuits, some dedicated lines supplying AV equipment and other non-dedicated lines shared with other parts of the home supplying lighting and other loads. Our recommendations for dedicated power lines:
  • Go for a 20A rather than 15A line
  • Use high gauge wire - preferably 10awg - to minimize impedance and maximize the ability of connected equipment to draw the instantaneous current they require
  • Minimize the length of wire between the outlet and the service panel for the same reasons as above
  • Use high quality 20A specification or medical grade outlets to minimize contact resistance and added noise
  • Ensure all lines are on same electrical 120V leg to minimize cross leg current flows

Nyal Mellor
Nyal Mellor


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Nyal Mellor, Founder, Acoustic Frontiers

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