The Harman Kardon HKTS 20 home entertainment system is a 5.1-channel system with a 200-watt powered subwoofer. Moreover, this Harman Kardon Home Theater System is upgradeable to 7.1 channels. This 6-speaker home cinema system includes four identical two-way satellites, one center channel speaker, and one subwoofer. Technical features of this Harman Kardon Home Theater System include a low-pass filter switch, audio sense turn-on, phase switch, and subwoofer level control. The Harman Kardon Home Theater System is designed to be set on a shelf with the option of placing the center and satellite speakers on the wall with the included wall-mount brackets. The frequency response range on the Harman Kardon HKTS 20 home entertainment system is 45 Hz to 20 kHz. Additionally, for the satellites and center speakers, the nominal impedance is 8 Ohms, and the sensitivity is 86 dB. The weight per speaker on this 6-speaker home cinema system is 2.1 lbs for the satellites, 3.2 lbs for the center speaker, and 19.8 lbs for subwoofer.