MallStop via Amazon offers the Sony 1,800-watt Mini Music System in Black, model no. LBTGPX77, for $489 with free shipping. That's the lowest total price we could find by $6. (Most merchants charge $579 or more.) It features an 1,800-watt total RMS, four subwoofers, two tweeters, CD player, AM/FM radio, LED display, Bluetooth, USB, and remote control.