The only thing I would say about that is that when it comes to power leads, I bought a Rotel A11 Tribute amp and found that it had an audible transformer hum when switched on at the wall - didn't have to be "On". I didn't like it and was thinking about buying a DC blocker. In the event, I bought a length of good mains cable, a mains plug and a kettle plug and made a new lead. It doesn't hum now. I realise that that's not "sound" as such, but removing the DC hum certainly made the sound of the music more enjoyable. I might be wrong, but I thought the issue with cables and sound was that some cables filter out e.g. RF noise more effectively than others. IF removing extraneous noise from a system is the intention and IF some cables do that more effectively, why wouldn't there be a higher price for those that do it better?If constructed and terminated correctly then there is no verifiable reason why a bundled cable of sufficient gauge will sound any different to any aftermarket cable of the same gauge and construction. Same applies to power leads.