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Old 3rd January 2012, 05:53 PM   #11
TerryO is offline TerryO  United States
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Quote:
Originally Posted by Evenharmonics View Post
You want to stay away from forums like that. There's a high chance that you will be misguided and end up wasting your money.
I have to agree. There's a lot of misinformation out there and until you get a handle on what's real, what isn't and what's iffy, I wouldn't invest too much (mentally or monetarily) into some of the more "controversial" areas of Tweakdom.

FWIW, all copper wire in the US (at least if it "is" American Manufactured Copper) comes in two standard (OFC) grades of "purity", 99.95 and 99.98 percent pure. The remaining impurities are, for the most part, trace amounts of sulphur. Chinese made copper wire, OTOH, is usually in the 80's for purity, so there can be a difference.

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Old 3rd January 2012, 05:55 PM   #12
TheGimp is offline TheGimp  United States
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If you have moderately long runs of speaker cable, and an amp which is sensitive to capacitive loading, then the capacitance of the cable may become a factor and it would be possible to hear the difference in cable in such an instance.

However, I submit that correcting the sensitivity of the amp to capacitive loading would be a better use of one's effort.
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Old 3rd January 2012, 06:27 PM   #13
DF96 is offline DF96  England
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Originally Posted by Zeta4
not expensive enough
Yes, sellers want profit. Buyers may want bragging rights, and price stimulates the placebo effect.
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Old 3rd January 2012, 07:12 PM   #14
benb is offline benb  United States
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Originally Posted by brucetassin View Post
I want to understand as much as possible.
I just edited this wiki entry to include and describe the ARRL Handbook:
Electronics:Recommended Reading - diyAudio

I have the 2011 edition. Page 22.39 has a table giving the resistance of copper wire of any given AWG, good for calculating the resistance of any cable. Resistance is usually the main thing you want to know. From that you can calculate the voltage drop into a nominal speaker impedance and the dB loss from the cable. As others suggested, inductance and capacitance could also be important depending on the cable length and how well the amplifier can drive a high capacitance. For power cables, you can calculate how much voltage drop there is in a cable between the power outlet and the internal connection in the amplifier. This is from cable length and AWG (which addmitedly might be hard to find out from the "data sheets" of these high-dollar cables).

Knowledge is power (personal, not electrical). With a little studying, you'll know more about cables than all the salesmen and most of the "designers" of these things.
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Old 3rd January 2012, 10:25 PM   #15
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OK, everyone is involved....good.
There is talk of cable length, resistance, purity of the coper, capacitance and so on.

I'm still stuck on a 1 meter power cable, you know, the one that takes the 120vac to the power transformer of the amp? OVER $1,000.00 in some cases!
What about from the back of the wall recp, all the way back to the power generating station?
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Old 3rd January 2012, 10:31 PM   #16
AJT is offline AJT  Philippines
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^what effect could a 1 meter power cable on a power transformer that can have 300meters of magnet wire? go figure......
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Old 3rd January 2012, 11:19 PM   #17
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Quote:
Originally Posted by Tony View Post
^what effect could a 1 meter power cable on a power transformer that can have 300meters of magnet wire? go figure......
Some people add to tube amps power sockets with filters intended to be installed in devices with SMPS that generate high frequency garbage. As the result, they catch up on their ground garbage from outlets. Lousy cables with higher resistance and inductance add losses attenuating currents that in case of strong cables would cause garbage drops on ground loops.

Here is typical example of such filter:

Click the image to open in full size.
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