In article , Don Pearce
writes
On Sun, 18 Jun 2006 14:45:02 +0100, Glenn Richards
wrote:

Don Pearce wrote:

OK Glenn, maybe you can't be bothered (yeah, right) but I can. I've
done the work for you and simulated the two effects - biwire, or
parallel wire, joined at the far end - in PSpice. The results
vindicate my position completely.

No they don't.

You've only placed a "lossy" cable on one leg of the speaker cable. So
you've got effectively a 5 metre run of cable from the positive speaker
output, then a short (as close to zero ohms as possible) run back to the
ground point on the amplifier.

Also, most crossovers I've seen often only have a series inductor (for
LF) or series capacitor (for HF), and don't bother strapping L or C
across the load. Admittedly some do, but I just took the plate off the
back of one of my Mission 760iSE speakers, there's a single inductor in
series with the LF driver and a single cap in series with the HF driver.
Clearly a case of KISS (Keep It Simple, Stupid).

Of course, Spice could be totally invalid along with a couple of
hundred years of theory, I suppose...

So how do you explain the fact that when the speakers are bi-wired they
sound better (clearer and sharper treble, more detail etc)? And when
single-wired they sound muddy by comparison?

Hint: the standard uk.rec.audio cop-out of "it's all in your mind" is
not a valid response. Of course it's all "in your mind", your ear only
gathers sound and turns it into electrical signals. It's your mind (or
more technically your brain) that interprets those electrical signals as
noises, whether pleasant or unpleasant. Just in case you feel like
getting pedantic.

Remember that computers do what you tell them to do, not what you want
them to do. So if your model isn't tying up with the observed effects
then your model is obviously wrong.

I'll give you a B+ for effort, E for accuracy. Your computer model does
not match the observed effects. Now, take the effort you're about to
expend on trying to prove me wrong and channel it into finding out why
the observable and repeatable effects occur.

Head teacher's comment: Plenty of enthusiasm, needs to channel self
better. D-.

Good grief - there really is no end to it.

OK, I've done all I can - anybody else feel like trying?

d



'ere guv, how can I bi- or tri wire me ESL63's cos if the squirrelsounds is
right.. I want some of what he's on)
--
Tony Sayer