Serial numbers may have little affect, but at least it shows that the company is making an effort. It can make one more hurdle that may make a counterfeiter hassle an easier target, like Audioquest. Audioquest has more problems with counterfeit than other companies, because they are such an easy target.
Also, companies like Tara Labs and XLO that have serial numbers and registration programs do help even more. If you are buying used cables, ask the seller for the serial number. Tara Labs and XLO could tell you if that seller is the registered owner of the cables. If you then buy the cables, you can have the registered title transferred to you.
This may sound ridiculous to some, but when you are talking about buying used cables costing many thousands of dollars, it can be comforting to know that they are authentic. It can be done, wouldn't you like to know that some of your $10K speaker cables paid to help authenticate them? LOL!
Also, companies like Tara Labs and XLO that have serial numbers and registration programs do help even more. If you are buying used cables, ask the seller for the serial number. Tara Labs and XLO could tell you if that seller is the registered owner of the cables. If you then buy the cables, you can have the registered title transferred to you.
This may sound ridiculous to some, but when you are talking about buying used cables costing many thousands of dollars, it can be comforting to know that they are authentic. It can be done, wouldn't you like to know that some of your $10K speaker cables paid to help authenticate them? LOL!