The cable has dual core wires. This is the sub end. The brown wire connects to the center pin. This is the signal wire, correct? The black wire connects to the outer contactor on the connector, this is the return wire, correct? So, they use a seperate return wire instead of the shielding brade. Correct???? Receiver end looks the same but the shielding braid and black wire are soldered together on the connector. So,
IF I'm correct, which I'm not claiming to be but just stating my assumptions, a return path is provided to complete the circuit and the world can keep on turning. If my assumptions are incorrect, please educate me.
I apologize for the crappy pic, but its 3:15 AM here, and I'm not digging out the digital camera for this. SO, it is what it is, a pic taken with an android phone in one hand and a flashlight in the other.