If you have cable as your source of TV, and I suspect you might, the subwoofer hum *may* be a ground loop from your cable source ... make sure you have your TV cable well grounded. Regarding the Blu-Ray and the hum, I'd probably take a close look to make sure that particular series of cables has a tight connection on all inputs. Just a guess, so I could be and probably am way off base.

Rick
Our Room

smile