I just got my K-100SW the other day and have it connected to a Onkyo TX-NR656, set up in a 5.1 config. My Sub is connected via the LFE channel on AVR and all seems to work great!
Except... When I turn off the AVR, after about 30 sec. I get a loud hum from the sub's. Im not sure if it is a config problem or something with the AVR. Any help would be appreciated.