On Wed, 03 Sep 2008 00:21:38 -0500, flipper wrote:

On Tue, 02 Sep 2008 08:18:21 -0700, John Larkin
wrote:

On Tue, 02 Sep 2008 09:48:21 -0500, flipper wrote:

On Tue, 2 Sep 2008 21:57:00 +1000, "Phil Allison"
wrote:


"flipper the fool "


Then why didn't you answer his question "How could a toaster work if
its line cord has hundreds of ohms of impedance?"


** Cos it was a stupid & irrelevant bait.

No, what's "stupid" is you can't explain why zip cord works perfectly
fine for toasters (and speakers) even though your audiophool cable
folks claim it has well over 400 ohms 'characteristic impedance' at
50/60Hz.


The answer is because it isn't a transmission line...

** Shame that is a 100% wrong answer.

Shame you apparently don't know squat about transmission line theory.


At audio frequencies transmission line effects don't begin until you
reach one or two thousand feet and at 50/60Hz power line frequencies
it's on the order of 5 miles.


** Shame that is 100% wrong too.

http://www.audiosystemsgroup.com/TransLines-LowFreq.pdf


It's worse than the paper suggests. Characteristic impedance is the
apparent impedance at one end of an infinitely long hunk of
transmission line. For any but a lossless line, there's, well, loss.

Right.

That'll also screw up trying to 'pretend' a speaker cable as a
transmission line in transmission line calculators because, unless you
compensate with ridiculous wire sizes, you end up with having to put
in astronomical line lengths to get the things to treat it as a
'transmission line' and cable losses also become astronomical.


What the carbon-loaded-plastic people are probably doing is diddling
the lossy transmission line equation to add enough shunt loss, the "g"
term, to make the characteristic impedance 8 ohms. The result is a
very lossy line. If it were long enough to act like 8 ohms, it would
eat all the amp's power, leaving nothing for the speakers. Even worse,
the loss vs frequency would be ghastly, the exact opposite of what an
audiophool is presumable trying to avoid.

Characteristic impedance is being confused with impedance. Some people
can't understand the difference.

What the carbon-loaded-plastic cable people are apparently not doing
is spending much money on copper.

High-end audio is mostly about lies to rip off the gullible.

Zip cord is fine. People who can hear the difference in speaker
cables, or RCA interconnects, or power cords, are delusional.

John