Harman Kardon offers its Harman Kardon HKTS 20 5.1-Channel Surround Sound Speaker System in Black for $189.99 with free shipping. That's tied with our June mention and the lowest price we've seen for a new system. (It's the best deal now by $35.) It features a 45Hz to 20kHz system frequency response, four 120-watt 2-way satellite speakers, 120-watt dual-driver center-channel speaker, 200-watt down-firing subwoofer, and all the necessary cables and wall-mount hardware. Deal ends August 20.