Acoustic Sound Design via Amazon offers the Harman Kardon HKTS 15 5.1-Channel Home Theater Speaker System for $129 with free shipping. That's $30 under our August mention, the best price we've seen, and a low by $520. It features a frequency response of 35Hz to 20kHz, four satellite speakers with 1/2" dome tweeters and 3" drivers, center-channel speaker with 3/4" dome tweeter and dual 3" drivers, 10" 100-watt powered subwoofer, speaker cables, and four shelf stands and wall mount brackets.