What is a good cable/socket system for modular circuits?
So, is there a good cable/socket type for this purpose? It preferably needs at least five wires (high, low, mid, left channel, right channel), which is why I don't think USB is a possibility. Also, will it be necessary for one of the wires to be hooked up to ground of the central hub? My intent is for the display and hub to have different power supplies, with the filter outputs hooked up to transistors in the display, which will in turn "trigger" the leds.
Forgive me if this is a glaringly obvious question; I'm entirely new to electronics, so I have no experience with cables and the like.
edit: the display is going to be at least a foot from the central hub, if not more, so ribbon cables and the likes are out of the picture.