@gammastrep if you can afford moving the amps close to the speakers the balanced interconnects from the preamp or source are not expensive, you don't need to go with special balanced cables, if you're equipment is balanced and differential take advantage of that.
In some cases geometry (or the wife) works against us and you can't separate in which case then go with long speaker cables.
In some cases geometry (or the wife) works against us and you can't separate in which case then go with long speaker cables.