"Ian Molton"...
Therefore they buy and recommend people to buy gear that requires
bi-wiring.

Thus if Quad didnt recommend it, they would lose out as high street
sellers wouldnt recommend their gear.

since bi-wiring wont DEcrease sound quality, why NOT recommend it?

So why do people, like What Hi-Fi magazine recommend it?
(At least, I think they do)

On Mon, 15 Dec 2003 08:47:28 GMT, "Wally" wrote:

Stewart Pinkerton wrote:

Will the presence or otherwise of bass frequencies affect how the
cable transfers the high frequencies?

No. This *has* been tried experimentally, and even with ten amps of
bass frequency current flowing, no artifact above -140dB could be
observed in treble tones.

So, what sort of artefact was there in the treble tones?

-140dB was the limit of measurement - no artifacts to be seen.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

On Mon, 15 Dec 2003 08:47:28 GMT, "Wally" wrote:

Stewart Pinkerton wrote:

Will the presence or otherwise of bass frequencies affect how the
cable transfers the high frequencies?

No. This *has* been tried experimentally, and even with ten amps of
bass frequency current flowing, no artifact above -140dB could be
observed in treble tones.

So, what sort of artefact was there in the treble tones?

-140dB was the limit of measurement - no artifacts to be seen.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

Stewart Pinkerton wrote:

No. This *has* been tried experimentally, and even with ten amps of
bass frequency current flowing, no artifact above -140dB could be
observed in treble tones.

So, what sort of artefact was there in the treble tones?

-140dB was the limit of measurement - no artifacts to be seen.

Aha. :-)


--
Wally
www.art-gallery.myby.co.uk
Latest work: The Langlois Bridge (after Van Gogh)

Stewart Pinkerton wrote:

No. This *has* been tried experimentally, and even with ten amps of
bass frequency current flowing, no artifact above -140dB could be
observed in treble tones.

So, what sort of artefact was there in the treble tones?

-140dB was the limit of measurement - no artifacts to be seen.

Aha. :-)


--
Wally
www.art-gallery.myby.co.uk
Latest work: The Langlois Bridge (after Van Gogh)

On Mon, 15 Dec 2003 16:18:34 -0000, "dead"
wrote:

"Ian Molton"...
Therefore they buy and recommend people to buy gear that requires
bi-wiring.

Thus if Quad didnt recommend it, they would lose out as high street
sellers wouldnt recommend their gear.

since bi-wiring wont DEcrease sound quality, why NOT recommend it?

So why do people, like What Hi-Fi magazine recommend it?
(At least, I think they do)

It gives them something to write about, and some of the contributors
like Jimmy Hughes are seriously out to lunch!
--

Stewart Pinkerton | Music is Art - Audio is Engineering

On Mon, 15 Dec 2003 16:18:34 -0000, "dead"
wrote:

"Ian Molton"...
Therefore they buy and recommend people to buy gear that requires
bi-wiring.

Thus if Quad didnt recommend it, they would lose out as high street
sellers wouldnt recommend their gear.

since bi-wiring wont DEcrease sound quality, why NOT recommend it?

So why do people, like What Hi-Fi magazine recommend it?
(At least, I think they do)

It gives them something to write about, and some of the contributors
like Jimmy Hughes are seriously out to lunch!
--

Stewart Pinkerton | Music is Art - Audio is Engineering

"Wally" wrote in message

Nick Gorham wrote:

Well as Stew has pointed out, it isn't going to make any difference,
but I still think assuming a high pass filter in the xover, then the
resistance of the xover will be high at low frequencies, so the
current at low frequencies will be correspondingly low.

Will the presence or otherwise of bass frequencies affect how the
cable transfers the high frequencies?


Nicely stated.

I've been saying over and over again that claims of reduction of
intermodulation due to biwiring presume that the copped cable is nonlinear,
but this says the same thing without far less technobabble.

"Wally" wrote in message

Nick Gorham wrote:

Well as Stew has pointed out, it isn't going to make any difference,
but I still think assuming a high pass filter in the xover, then the
resistance of the xover will be high at low frequencies, so the
current at low frequencies will be correspondingly low.

Will the presence or otherwise of bass frequencies affect how the
cable transfers the high frequencies?


Nicely stated.

I've been saying over and over again that claims of reduction of
intermodulation due to biwiring presume that the copped cable is nonlinear,
but this says the same thing without far less technobabble.

"Wally" wrote in message


Stewart Pinkerton wrote:

Will the presence or otherwise of bass frequencies affect how the
cable transfers the high frequencies?

No. This *has* been tried experimentally, and even with ten amps of
bass frequency current flowing, no artifact above -140dB could be
observed in treble tones.

So, what sort of artifact was there in the treble tones?

Nothing audible. -140 dB corresponds to one part in ten million. Pinkerton's
point is even with measurements with that incredible level of sensitivity,
there are no artifacts to be seen.

Once upon a time, a well-known expert in audio perception (James Johnson,
then of AT&T labs, now of Microsoft) was asked for an unconditional limit to
audibility, and he said -100 dB.

This would be under absolutely ideal listening conditions, including an
unbelievably quiet room.

100 dB is the unconditional limit, for sure.

With the usual real-world messiness, the 100 dB almost always falls to
something like 60 to 80 dB, and can be as poor as 20 dB.

IOW if a spurious response is 20 dB or less down, you'll probably hear it
regardless. In typical studio or listening room conditions, you might hear
something that is 70 dB down. Under the most ideal conditions imaginable,
something 100 dB just might be audible.

Hearting something 140 dB down is really unimaginable, in real-world terms.

I can measure artifacts up to about 120 dB down, and at that point copper is
still a *perfect* conductor of audio signals, as are most common metals -
brass, aluminum, tin, nickel, gold, silver, lead, steel... However, add a
little surface contamination at the contact point, and all bets are off!