"John Phillips = Pommy ****"

Even in the audio band,
loudspeakers can present impedances from near zero to high enough to
be considered infinite.

WRONG. Show me one.

That's not relevant.


** It was YOUR damn stupid claim - ****head !!

Soooooo *** YOU *** get to prove it OR else

be considered by ALL as yet another lying, pommy TURD.



In designing a power amplifier what's important is
the range of possible behaviours over as many 'speakers as the designer
wants to take into account - not just one.

** Giant HUH !!!!

What sort of pseudo-logical, dishonest CRAP is that ????



That's true only in the consideration of load-related stability problem,
and then only in the case where the "usual" RLC network is present.
Having learned about the RLC solution to the problem I, for one, retain
the academic curiosity to learn how it might otherwise be done. Remember,
that's the way progress lies.


** Another GIANT HUH !!!

This TOTAL LOON must be one of them half-witted Star Trek fanatics -

with pointy ears and all - to match its pointy head.


So it seems to me that investigating loudspeaker cables with loads
from zero to infinity, and at frequencies well above the audio band,
is perfectly reasonable.


** No doubt Mr Spock would agree.


I guess you meant to write that differently since the minimum of that
range as written, (4 +/- 4j) Ohms, would only do for designing an
amplifier intended to drive loudspeakers labelled "8 Ohms" or above
(assuming the relevant DIN standard had been observed).
You might like to consider, for example, figure 4 from this page:
http://www.stereophile.com/features/99/index4.html.


** Figure 2 shows the impedance curve of a typical, 8ohm nominal, 2-way
speaker with minimum Z of about 7 ohms * resistive* at 250 Hz and a worst
case load phase angle of 45 degrees ( leading ) at 16 ohms and 80 Hz.

Easily driven, to full output level, by just about any amp ever made.


HOWEVER:

Figure 4 simply has no technical meaning whatsoever.

But IS a VERY NICE example of the MAXIM that says:

" There are lies, damn lies and ... statistics. "
-----------------------------------------------------

BTW:

Speaking about being " helpful "...

go help yourself to a kilo of rat bait.

ARSEHOLE !!!



.... Phil