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Re: How were the two "top" cables selected?

Posted by Jon Risch on April 20, 1999 at 19:06:21

In Reply to: How were the two "top" cables selected? posted by Richard Greene on April 20, 1999 at 17:04:51:

I also tend to disagree with the author of the original article (Mr. Hayward), for many reasons, not the least of which are that he latches onto one single measurement factor as the ultimate metric, risetime, and that is a sure sign of having methodological blinders on. But your statements after that are not all factual or substantiated.

[ So the "down 3 dB at 20 kHz. is not audible. ]

This is right out of the ABX bible. Couldn't you be a little more imaginative? -3 dB implies - 1 dB at 10 Khz, and several fractions of a dB at lower frequencies. Nothing exists in a vacuum, including -3 dB points. In fact, examination of the inductance of typical zip cord cables, indicates that the rise from the DCR baseline starts at a relatively low frequency, one that gets lower and lower as the gauge does down (wire gets bigger). Most 12 gauge zip cords deviate from the DCR baseline by several hundred Hz. Yep, that big garden hose of a wire is no longer as low in impedance begining as low as 300 or 400 Hz!

The other factor invariably overlooked is that a -3 dB point implies a phase shift of at least 45 degrees, with corresponding amounts below that point, all the way down to the several hundred Hz point.

This means that the phase of the highs is no longer in step with the lows, and waveform distortion is the result.

[ That comment would not apply to bi-wiring which
simply adds more copper between your amp and speakers -- perhaps
"buy wire" would be a better spelling than "bi-wire" -- the
electrical circuit remains the same whether the wires from the
drivers inside your speakers meet at the speaker terminal or
at the amplifier terminal. ]

This is also right out of the ABX bible, nearly word for word.
Now I have posted frequently about how bi-wiring works. I find it hard to believe that you have not seen a one of them, or that you are not aware of the information at my website regarding current flow in bi-wire cables.
The electrical circuit IS NOT the same, nor is the resulting output signal from the speaker.

That makes your statement either supreme ignorance, or the desire to make unsubstantiated and misleading statements.

With the benefit of the doubt in mind, see this post and the related posts:
/audio/tweaks/messages/487.html

Jon Risch

This post is made possible by the generous support of people like you and our sponsors:

Sonic Craft

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