Most likely the long unbalanced interconnects must be shielded(RFI safe) and it dictates higher per-unit capacitance. How much of the trebble will be rolled off? Probably not too significant. May even be more beneficial to the listener, but I 'grew up' from having unbalanced interconnects and use only balanced between components regardless of distance.
I can share on how to convert any unbalanced component to balanced.
I can share on how to convert any unbalanced component to balanced.