Ramius, the Stryke bass test CD you mentioned to me arrived. What an amazing piece of equipment. Proves one thing, there is no 50hz in my living room! Can't tell if it is the speakers or the room but I suspect the room. Also, I can't hear anything below 26hz, it is there because the SPL meter says it is there but I'm dashed if I can detect it. I must be getting old. I will have hours of fun moving my sub around the room, thanks.