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(Bob-Stanton) wrote in message . com...
(Stewart Pinkerton) wrote in message
While true, this is irrelevant to the fact that lumped theory is
perfectly adequate for audio frequencies in domestic situations.

Yes, I agree that lumped constant models are perfectly adaquate for
audio frequencies, if one doesn't have the software necessary for
modeling a true transmission line.

BTW, have *you* ever tried modeling a *real* speaker cable using
lumped constants?

BTW, have *you* EVER bothered to see if your "theory" results
in predictions that you have then compared with ACTUAL
measurements?

I'm curious to see what you used as a lumped
constant model. Please show us a model of 100 ft of standard (Home
Depot), 12 gage cable (terminated by an ideal 8 Ohm load).

Please show us who is using 100 ft of standard (Home Depot)
12 gauge cable in a typical home listening situation.

Please show us ANYONE whose speaker cables are terminated by
an ideal 8 ohm load.

Mr. Stanton, your model is **** NOT because its a transmission
line or any other model, it's **** becuase of your grossly incorrect
assumptions and the fact that these assumptions simply don't exist
in actual situations.

BTW, have you ever tried modelling a *real* loudspeaker as the load?

Dick Pierce in the past, has presented a lumped constant loudspeaker
model. I'm sure it is adaquate for use as a load.

And that is yet more evidence of how far from physical reality
your "model" is. I have presented a NUMBER of lumped parameter
(not "lumped constant") models, as each and every speaker system
presents a significantluy different load.

So, let's review your assumptions behind your "model" once again:

1. You assume that people are using 100 feet of cable.
But people VERY RARELY use 100 feet of cable, it's more
typically 1/10th that distance, making the necessity of
a transmission line model even more irrelevant and
unnecessary.

2. You assume that the cable is terminated by an ideal
8 ohm load.
But NO speaker is anything approaching an ideal 8 ohm
load.

3. You have looked at ONE example of a non-ideal load.
But, apparently, you have never incorporated such a non-
ideal load in ANY of your models.
Further, you have apparently ignored the fact that one
lumped parameter model simlpy is not representative
of the enormous variations in actual speaker loads.

And, finally:

4. You have never once presented a single shred of physical
evidence in support of your "theory" that demonstrates
its superiority or even its very efficacy. You insist
your "theory" is right, but are unable or, more likely,
simply unwilling to do ANY of the work YOU need to do
to support it.

YOUR theory, based on your gross missapplication of transmission
line principles, your preposterous assumptions of operating
conditions, and your long-demonstrated inability to relate it to
any real-world performance issues indeed makes YOUR theory useless.