Harman Kardon offers its Harman Kardon HKTS 20 5.1-Channel Speaker System in Black for $599.95. Coupon code "220HKTS20" cuts it to $219.99. With free shipping, that's tied with our mention from a month ago and the lowest total price we could find now by $90. It features four 120-watt 2-way satellite speakers, one 120-watt dual-driver center-channel speaker, one 200-watt down-firing subwoofer, and all the necessary cables and wall-mount hardware. Deal ends May 15.