that is how i envisioned it, but no retailing i've spoken to has agreed, though that could well be because they don't have experience with this approach and want to handle things according to their own sales approach.
re connections: i'm confused, one SET of speaker cables for each channel means two separate wires (each with a positive and negative sub-wire if you will) going to two terminals (i.e., positive and negative terminals on sub and amp). i guess you could attach two sub-wires to each terminal but that seems unnecessary, why not just take one wire from the SET, with a positive and negative sub-wire (sorry for the stupid neologism), and use that for the left and the other wire with its two subwires for the right. my apologies for the confusion. and thanks