Doug Sax on wire
"Arny Krueger" wrote in message
. ..
I can believe someone might hear a difference between a non-copper cable
like the silver cable, and I can believe it might be due to
rectification
effects. I know that I can hear a difference between copper-clad-steel
RG-174 and similar copper cable. I am pretty sure that is due to
junction
issues.
For people who don't carry a RG cable characteristics table around in
their
heads, RG 174 is micro coax. The center conductor is about 24 gauge. DCR
of pure copper 24 gauge is about 2.5 ohms per 100 feet. It makes pretty
crappy speaker wire, but tell that to Radio Shack!. ;-)
IME the DCR of copper-clad wire is about 4 times that of solid copper, so
now we're talking 10 ohms per 100 feet. IOW if you're driving a 110 ohm
load
with a low impedance source, there's about 1 dB of loss per 100 feet.
You'll
easily hear that in a close comparison.
Except that the only 110 ohm loads most of us drive are AES digital
connections, and you shouldn't hear a difference with a 1dB loss in a
digital signal unless the receives is so bad that it craps out without 100%
full amplitude.
More likely in the audio world a coax cable would be used into a 10k load,
and the loss would then be about .009dB. Even into a 600 ohm load the loss
would be 0.14dB -- and who uses unbalanced coax into 600 ohm loads?
Peace,
Paul
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