The last component of my 12 year old Sony Shelf System died. The speakers connected with traditional spring clips. When installing my brand new Sony MHC-EC709iP (mini hifi), I discovered that it had a modular "telephone/internet" style connector for the speakers and subwoofer. One end is hard-wired to the speaker. The other, which connects to the "amp," is the modular connector. The previous owner of my home had already run wire through the walls and under the floor, so that his speakers, and now mine, had some distance. My question is, is it advisable for me to use the same wire by cutting the cord at the speaker, attaching it to the already installed and run speaker wire, and then attaching the other end of the "in-wall" wire to the wire leading to the modular connector? Sony (of course) wants me to buy a proprietary speaker wire.