Harman Kardon 6.1 Channel Home Theater Speaker System (HKTS 8) (Discontinued by Manufacturer) Level control and low bass filter switch for fine-tuning bass response to match the room acoustics. 100 watt Powered subwoofer for great sounding home theater. All speaker cables are included. Magnetically shielded speakers. The subwoofer automatically senses the audio signal and powers on and off by itself.