Microsoft Store offers the Harman Kardon Invoke Bluetooth Speaker with Cortana in Graphite or Pearl Silver for $99.95 with free shipping. (Best Buy charges the same price; Amazon does too, but it's on backorder.) That's tied with a Black Friday sale price from a week ago and the lowest price we could find now by $100. It features three woofers, three tweeters, two passive radiators, Cortana voice control, and a frequency response of 60Hz to 20KHz.