Interesting? I think 5 minutes before twelve should be more than fine. I have my EP350 at 12:05....What receiver are you using? Could it be the level on the receiver has gotten cranked up for the Sub channel? I think mine is like -4db when I watch movies, and it rocks the room...

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85