Groupon offers the Harman Kardon Onyx Studio Bluetooth Speaker in Black for $89.99 with free shipping. (A 2-Pack is available for $177.99.) That's $10 under our mention from five days ago and the lowest total price we've seen. (It's the best deal today by $10 as well.) It features 60 watts of total system power, two 3" woofers, Bluetooth 3.0, and 60Hz to 20kHz frequency response. Deal ends December 3.