just for the record, the shielding is metal or it's not shielding; it also needs to be grounded, but the power audio outputs of amplifiers are generally not des

just for the record, the shielding is metal or it's not shielding; it also needs to be grounded, but the power audio outputs of amplifiers are generally not designed for grounding; and you also need to worry about capacitance and inductance; twisted pairs might give you better noise characteristcs wrt AC wiring hum than shielding I'm not saying wires don't matter and I'm not saying wires do matter, I'm saying inasmuch as they make a difference, there are plenty of ways to undermine what you are doing. Might be a better idea to send shielded high impedance signals around the room and put power amplifiers at the speakers.