I wonder if there is anyone who has compared the unequal length of interconnects personally and can hear or feel the differences? On the other hand, one might not be able to tell the difference at the beginning, but feel uncomfortable after long listening?
The differences caused by unequal length of interconnects may not only be the speed of Electrical signals travel. The unbalance of capacitance, inductance and phase may cause more problems, but those differences may be too subtle to tell.
It is very interesting that most member in Audioasylum believe the cables must in equal length for both channel, but I do not know if they can tell the differences when the cables are in unequal length.