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Snake Oil Department, Top This
- Thread starter Ron Texas
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Speedskater
Major Contributor
For Radio Frequency Characteristic Impedance above say about 100 kilohertz , you can use the short form formula and this is true.
For Audio Frequency Characteristic Impedance, things get real complicated real fast.
At audio freqs and home cable lengths, characteristic impedance dosnt matter. If what Danny says was true a 1khz square wave would get mangled (very easy to measure but no GR research means no testing) and transatlantic phone calls would have been impossible.
Speedskater
Major Contributor
Exactly.
and at audio frequencies it has a different characteristic impedance ah the frequency changes.
mhardy6647
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Wait, does Einstein know about this?So according to Danny, signal travels faster along cables with lower resistance? Must be a bummer for recording studios. Mics and instruments will be all over the place due to the resistance variation from differing cable lengths.....
Does that depend on how heavy the loudspeakers are? It'd be interested to see a plot of break-in time vs. loudspeaker weight (or maybe pressure, mass per unit area*).
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* I was gonna type pounds per square inch, but then I remembered where I was postin' and thought better of it.
Speedskater
Major Contributor
While Danny description was not exactly correct, it has been known since the days of telegraph, that in miles long audio cables, the velocity of propagation varies with frequency
Indeed, but I'm not buying that silver plating over copper on a speaker cable brings the midrange forward by virtue of the claim that it arrives faster!
Actually, pressure is defined as force per unit area; the SI unit is Newton per square metre (N/m²). Granted when talking about surface loading on earth, the surface loading is proportional to mass, the mass exerting a force vector towards the earth's centre of magnitude mg, where g is the earth's gravitational field strength, ~9.8 N/kg. g varies according to how far you are from the earth's core (the earth is not perfectly spherical) so it 's different at different points on the earth's surface.Wait, does Einstein know about this?
Does that depend on how heavy the loudspeakers are? It'd be interested to see a plot of break-in time vs. loudspeaker weight (or maybe pressure, mass per unit area*).
___________
* I was gonna type pounds per square inch, but then I remembered where I was postin' and thought better of it.
mhardy6647
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Actually, that was a response I was going to post, then decided not to, but Xenforo's memory is better than mine! (i.e., I forgot to delete the comment).
For the record, I got to thinking about the fact that c varies in different media (cf. Cerenkov radiation), so I had meant to demur.
Is that frequency dependence an E = hν kind of thing?
There are reasons I am a biochemist and not a physicist!
If a footer takes days to break in, how long does a refrigerator need to break in before using it?
You have to also put your amp east of the the speakers so you can take advantage of the time shift to make the midrange forward. If you want to tame the midrange, move the speakers east of the amplifier. I am surprised that Danny did not suggest that!
PHD
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Would you pay $60k for a Music server that looks like a toaster oven?
You have to listen to this nutjob explain the special feature that allows you to control the amplitude and shape of the digital waveform without affecting the ones and zeros, which improves the sound quality.
www.theabsolutesound.com
You have to listen to this nutjob explain the special feature that allows you to control the amplitude and shape of the digital waveform without affecting the ones and zeros, which improves the sound quality.
Wadax Atlantis Reference Music Server - The Absolute Sound
Wadax Atlantis Reference Music Server - This new music server features cutting-edge technologies never seen in an audio product—and delivers unprecedented sound quality. Robert Harley reports on a groundbreaking design.
www.theabsolutesound.com
Those have to be the ugliest looking pair of components I've ever laid eyes on.Would you pay $60k for a Music server that looks like a toaster oven?
You have to listen to this nutjob explain the special feature that allows you to control the amplitude and shape of the digital waveform without affecting the ones and zeros, which improves the sound quality.
Wadax Atlantis Reference Music Server - The Absolute Sound
Wadax Atlantis Reference Music Server - This new music server features cutting-edge technologies never seen in an audio product—and delivers unprecedented sound quality. Robert Harley reports on a groundbreaking design.
Alexander Gödde
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"If the preamplifier has colourations, you can't really hear what the rest of the system does." - Robert Harley in that video.
Why does that no apply to the source, or the poweramp, or the speakers? After all, it's the sound coming from the speakers that you hear.
Why does that no apply to the source, or the poweramp, or the speakers? After all, it's the sound coming from the speakers that you hear.
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The reason is that you have to believe in audio voodoo, unscientific information and be gullible to all the snake oil that the snakes (companies) can put out. The stupid stuff that these people believe always goes 100% against any accepted science for the audio region of frequencies. A lot of snake oil uses fairly accurate info regarding GigaHertz frequencies and tries to say it applies to our speaker drivers. Pure poppycock.
Speedskater
Major Contributor
Yep, a lot of audiophile marketing departments take real engineering knowledge way out of context and misapply it.
A cable that is great at Gigahertz frequencies is a poor choice at audio frequencies and the opposite is even more true.
There'd be no money in it. Profit margins for cables can be ludicrously high since the cost of the materials to make cables is low, compared to making, say, an amplifier. That's true unless expensive materials, like pure silver are used. I'm sure that if silver were used, the price would be jacked up above and beyond what would be needed to cover silver's cost.
Nice Playstation you got there
Manufacturer of snake-oil free cables. They seem to have a successful business manufacturing and selling cables at sensible prices made from high quality materials.
Bought all of my Canare 4S11 speaker cable from them.
