knightout:MattSPL:
I got bored reading every post in this thread a while ago, but if it hasn't been mentioned, one of the reasons that cables do sound different is due to them having different types of insulation and some being screened and some not being screened.
An unscreened 79 strand copper wire for example is leaving itself open to airbourne RFI. So a screened cable will sound better that it, even if only for having reduced RFI due to the screening.
If you look at the complex construction of some cables
http://www.psaudio.com/ps/products/description/xstream-premier-sc?cat=classics
Even though you may say a cable is a cable, this complex arrangement of the cable conductors and screening is what you pay for and what brings the benefits as much as anything else.
Id say this thread has broken all records at this stage so congratulations to the OP for that.
The link you give is for a power cord. We are talking about cables not filters any existing RFI in the mains cable would still be present. If for some reason the last meter of cable in your room is subjected to a lot of RFI, like you live next to a transmitter tower, then a shielded power cable costs <£10. Personally I rely on the power supply components of my hifi equipment to remove any RFI. The conversion from AC to DC done in the power supply stage should eliminate all or most RFI in the power supply. Good amplifiers are designed to have quiet power supply by using filtering and regulating the dc rails. If the main supply has so much RFI it gets past the power supply stage and has an audible effect I would suspect either the hifi equipment is very badly designed or you have grounds for complaint to the utility company. Ground loops and ground noise seem to be a much more common problem with power supply.
I agree RFI can be a problem but I think it is much more likely to effect components if it is getting in via line-level inter connectors.
I do use shielded cables for my satellite system, because the LNB > Receiver frequency range is the same as used by some cordless phones, and occasionally caused by some other things like electric Emerson heaters.
Yes i did post a link to a power cord, mainly just to show complex cable construction. But the cable i posted has a ferrite impregnated sheath around it, and its proven that ferrite filters RFI from the mains, thats why computers power cords have ferrite rings on them. So its not just to block airbourne RFI. If amplifiers and electrical components have adequate filtering as you say, then why do computers and their monitors need these ferrite rings on their power cords?
And back to the speaker cables, Ps audio use screening on their speaker cables
http://www.psaudio.com/ps/products/description/xstream-speaker-cables1?cat=classics
as do many other cable manufacturers. This somewhat justifies their extra cost compared to 79 strand copper cable.
I know some cables are stupid money that i wouldn't consider paying but thats when i found Ps audio. The RRP for their top products is sometimes crazy money but when they replace them with a new model they are available for very reasonable money and outperform anything ive heard at any cost, especially the Premier sc power cords.