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RE: Instantaneous current demand and wire gauge?

Check out the link below-
otherwise-

The ability of a given wire to accommodate a given amperage is well characterized and appears as part of the IEC - and is usually given in tables where you have Volt amps on one side, wire gauge across the top and in the columns are listed the acceptable distances -
while this is not exactly what you asked - it does address the subject-

the speed of transmission is a constant- through the wire and is only affected by the connections and the supply

Typically in HiFi we are in the under 1000 V/A range - so at 120 VAC the current would be 8.334 Amps - so anything over #14 wire is good for 50 feet with negligible losses - and if you use wire better than #10 you are good to 100+ feet-
Given that many of the speaker wires commonly used are bigger - the ampacity is not really an issue - it becomes the exotic construction etc...

Happy Listening


Edits: 03/09/16
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