Ending today, A4C offers the refurbished Harman Kardon Aura Bluetooth Speaker in Black, model no. HKAURAAPBLKAM-Z, for $139.95 with free shipping. That's $10 under our refurb mention from December and the lowest total price we've seen. (It's also $29 below the best deal we could find for a new unit.) This omni-directional system features a 50Hz to 20kHz frequency response, six 1.5" high- and mid-range drivers, and a 4.5" subwoofer.
Note: A 90-day A4C warranty applies.