Newegg offers the Sony 154-watt Ultra Premium Hi-Res Portable Bluetooth Speaker with NFC and WiFi in Black, model no. SRS-X9, for $349.99 with free shipping. That's the lowest total price we could find by $149. It features 154 watts RMS power, a 45Hz to 40kHz frequency response, four 0.75" tweeters, two 2" midrange speakers, 3.75" subwoofer, NFC pairing, 802.11g wireless, Bluetooth 3.0, Ethernet, USB, 3.5mm auxiliary port, and remote control via the free SongPal app for iOS or Android.