Turns out they're Sony connectors. You get little plugs that snap onto the wire ends and then plug those in. You can find them via a search for "speaker wire connectors (or adapters)" on eBay. About $10. Found a unit made by Sony (str-ks380...there are similar models...ks370...ks360) that has a coax in, 3 HDMI in, one HDMI out...used...for $50. That'll work. Will run a separate DVD player into it with HDMI. There are home theater receivers as well that have speaker wire inputs but they don't have much in the way of HDMI in and out. "A/V HDMI receiver Sony" will pull these units up on Ebay.
