Had to configure my system the same way due to room aesthetics, with equipment near one wall and speakers near the opposite wall. Ran speaker wires internally up one wall through the attic down the other wall. Must be around 10 meters because that is the length REL gives you for their powered sub woofer hookup. Used 10 or 12 gage for the B&W 805's. Ideal? No. Sounds great? Yes. Should work out.