Adorama offers the open-box Polk Audio S60 Tower Speaker Pair bundled with the Yamaha RX-V683 7.2-Channel 4K Ultra HD Bluetooth Receiver, Polk Audio S20 Bookshelf Speaker Pair, and Polk Audio S35 Center Speaker for $1,119 $1,199 with free shipping. That's $981 under the lowest price we could find for factory-sealed versions of these items purchased separately elsewhere. This set features a 26Hz to 40kHz frequency response.