Groupon offers the Harman Kardon Onyx Studio Bluetooth Speaker in Black for $79.99 with free shipping. (A 2-Pack is available for $158.99.) That's $10 under our mention from a week ago and the lowest total price we've seen. (It's the best deal today by $34.) It features 60 watts of total system power, two 3" woofers, Bluetooth 3.0, and 60Hz to 20kHz frequency response.