Native_bon said:
andyjm said:
Anyone searching for an example of expectation bias need look no further than this thread.
In a past life I designed audio recording equipment for a well known national broadcaster. At no stage did we entertain any cable tomfoolery, except to specify current carrying capability for mains cables, and basic LCR parameters for signal and speaker leads.
In spite of this, we still managed to build studios which arguably produced some of the best recordings of the 20th century. Just remarkable how we managed to get by without the benefit of modern marketing.....
Hum... What of ..WIFI.. internet.. sky.. virgin satellite... not to talk of more equipment in ever house. In one home you may have as much as four laptops or even more phones. The noise in the mains these days will not be the same like the time you mentioned.. I think you need to kind of bear that in mind..
Strangely, in the 30 years since I was an EE, the basic theories of electromagetic radiation and conduction have remained the same. In fact, they haven't really changed for the last 100 years.
As long as your amp has some filtering on the mains input (a power supply transformer and storage caps make a pretty good filter), then no amount of nonsense with a mains cable will make any difference.
If (and it is a big 'if') your amp has an extremely poorly designed power supply, and your mains is extremely noisy, then a proper LC mains filter placed close to the amp may make an improvement, but not a magic cable.
While there is a tendency on this website to dismiss expectation bias effects as 'it doesn't happen to me', given the lack of any scientific underpinning for mains cable claims, and the wealth of reports on the unreliability of human perception, my money would be that any difference you hear is not due to the cable.