Hello, all,\n\nMy Yamaha RX-V685 AV receiver came with a YPAO microphone. I know it did because I held it in my hands.\n\nBut that was a couple months ago, and I seem to have lost it. I'm sure it exists somewhere in the world, but I don't know where and I've given up looking.\n\nWhat bad things happen if I don't have one? I know I can't run the test referred to on pages 38 to 43 in the online PDF manual, and I don't know what else the YPAO mic does. Is there some way to fake it, i.e., can I get close to setting my five speaker's volumes or whatever it is in the absence of that mic? Is whatever it does so important that I should spend money to replace that YPAO mic?\n\nOn what I think is a related question, the room where my Samsung 65-inch QLED TV, the Yamaha RX-V685 receiver, two Klipsh speakers for the front, a center speaker for the front, and two bookshelf speakers for the back are missing a subwoofer. My questions are whether I need or want a subwoofer and, if so, which brand and model you would recommend. Can I somehow take advantage of Bluetooth technology to send sounds from the receiver to that subwoofer?\n\nPlease help with the subject of the mic and the subject of the subwoofer, and thanks.\n\n--JohnnyGee\n\nP.S. If I go to Amazon, do you know which exact model of YPAO microphone came with my Yamaha RX-V685 receiver? A model number or a link -- if you're sure -- is all I need. I can't figure it out with enough certainty to go ahead and plunk down $15 or $30.\n\nP.P.S. I realize I'm a complete stranger to all of you, but if you have the working YPAO mic that came with your Yamaha RX-V685 receiver and decide to trust me despite the fact I could be conning you out of your YPAO mic, please let me know and I'll be happy to discuss shipping arrangements with you. This is not an emergency.