[Phil Allison[_3_]]

"flipper"

Well, I suppose we just wouldn't mention that to be a transmission
line at audio frequencies the cable would have to be miles long.


** Not this stupid red herring again !!!

I though only ****wit radio hams misunderstood the topic of transmission
lines so badly.

The theory of "electrically short" transmission lines says they act like
pure capacitors if unterminated and like inductors if shorted. As with
longer transmission lines, when terminated by a resistance equal to the
line's characteristic impedance - there is almost no upper limit to the
frequency range.

Ordinary twin speaker cables are transmission lines, but with a
characteristic impedance of around 100 ohms - so when terminated by an 8 or
4 ohm resistor show high frequency roll off above the audio band due to
series inductance. Specially made cables ( woven conductor or strip lines)
with a characteristic impedance of 8 ohms show no such roll of.

Mostly this roll off hardly matters, but a few cases exist where the
speaker's impedance falls to a low value ( 1 or 2 ohms) at or near the top
of the audio band and then it can matter quite a bit. The original QUAD ESL
is one example and even the AR11 has a huge dip in the impedance at 5 to 6
kHz



..... Phil