Speaker Wire Loss Study
Posted by
John Oppenheimer on
Dec 19, 2018; 2:46am
URL: http://elecraft.85.s1.nabble.com/Speaker-Wire-Loss-Study-tp7647228.html
There were some comments about speaker loss and the contribution of loss
as a result of vinyl dielectric. A way to evaluate is to measure a
length of speaker wire and compare to an air dielectric equivalent. Here
is an example:
https://www.kn5l.net/SpeakerWire/The Air dielectric equivalent model is for #18 with spacing for a Zo
match with the speaker wire, 117 Ohm.
Note that at 10 MHz, the speaker wire loss is over three times the air
dielectric equivalent.
A DC resistance of the speaker wire suggested that the wire size is
actually closer to #19. Tough measuring these very low DC resistances,
so decided to assume #18 for the air dielectric model.
The speaker wire loss and Zo used a Zoc and Zsc data set. There are
links to the two files for verification.
Check my math!
John KN5L
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