idjnow.com via eBay offers the Alto Professional Bluetooth DJ PA Speaker, model no. TS115W, for $300 with free shipping. That's the lowest total price we could find by $99. It features a 15" woofer, 12” low-frequency transducer, 1” neodymium driver, 800 watts of power, two mic/line combo inputs. XLR output, and contour EQ control.