As one of its daily deals, A4C offers the Harman Kardon Aura Plus Bluetooth Speaker in Black or White for $179.95 with free shipping. That's $20 under our September mention the lowest price we could find now, also by $20. This omni-directional system features six 1.5" drivers, a 50Hz to 20kHz frequency response, and Apple Airplay. Deal ends today.