As one of its daily deals, A4C offers the refurbished Harman Kardon Aura Bluetooth Speaker System in Black for $139.95 with free shipping. That's $10 under our mention from a week ago and the best price we've seen. (It's a current low for a refurb by $10.) This omni-directional system features a 50Hz to 20kHz frequency response, six 1.5" high- and mid-range drivers, and a 4.5" subwoofer. Deal ends today.
A 90-day A4C warranty applies.