I recently purchased the Onkyo HTS650 system, and I had one question. Can I leave the subwoofer on 24 yrs a day, 365 days a year, or is that harmful?? The back of the subwoofer itself has a volume (maybe frequency) dial, than can adjust the level of bass it produces, and it also has a STANDBY light. B/c of the STANDBY light, does that mean it is alright to leave it plugged in all the time. Thanks, all help will be appreciated.