I have a Neutrik speaker cable, with the connector on one end and bare wires on the other. It's a two core cable. Is this usual? I got the cable to connect my MJ Acoustics subwoofer high speaker level input to my amp, though from what I've seen/read I'm meant to have a 3 core? Or perhaps I'm misreading and I should just connect one cable to two plus "+" terminals on front left/right speakers and the other cable to the negative to one. Does that sound right?
The colour of the 2 core cables are brown and blue, if that helps.