I am not technically trained so I can't give an authoritative, scientific answer. However, I too am curious as to the answer. Here are some speculative, albeit uninformed, thoughts.
1. Some high end manufacturers do not believe you need any "special" wire". As long as there is good contact at the terminals, no film of dirt or oxidation, and sufficient wire gauge, then that is generally sufficient.
2. The wire inside the component may not be as good as some "special" interconnects. So the better interconnects may subtract less during transmission, so to speak, than the component's internal wire. For example, the interconnect may be better shielded than the wire inside the component.
3. The signal is passing through terminals which may alter its charcteristics. In other words, the signal inside the component before it reaches the output terminal may not be the same as the signal after it passes through the output terminal on its way to the power amp. So the interconnect may be optimized for the different signal characteristics than what is ocurring in the component. This is a variation of number 2 above. Number 2 suggests the wire in the component may not be as good. Number 3 suggests it is the terminal which are having an effect, therby necessitating a different wire.
4. There are good marketing people who make you believe the interconnect is "special", when in fact it may make no difference.
I shall be interested to see what others say.
1. Some high end manufacturers do not believe you need any "special" wire". As long as there is good contact at the terminals, no film of dirt or oxidation, and sufficient wire gauge, then that is generally sufficient.
2. The wire inside the component may not be as good as some "special" interconnects. So the better interconnects may subtract less during transmission, so to speak, than the component's internal wire. For example, the interconnect may be better shielded than the wire inside the component.
3. The signal is passing through terminals which may alter its charcteristics. In other words, the signal inside the component before it reaches the output terminal may not be the same as the signal after it passes through the output terminal on its way to the power amp. So the interconnect may be optimized for the different signal characteristics than what is ocurring in the component. This is a variation of number 2 above. Number 2 suggests the wire in the component may not be as good. Number 3 suggests it is the terminal which are having an effect, therby necessitating a different wire.
4. There are good marketing people who make you believe the interconnect is "special", when in fact it may make no difference.
I shall be interested to see what others say.