As per Jason's suggestions I checked my speakers with the SPL meter set at 80, the speakers all came in around -2 or 78db, where the sub made a significant rise to -7 or 73db.
I'm guessing the sub is still set at a rather high level, the 500 volume is about the 7 o'clock position with the dbs for the sub set at +4.5 on the receiver. During the test tone I had pictures on a wall 40 ft away rattling.
Tom, you were correct about the walk around, I'm getting peaks and valleys virtually all over the house, my sitting area being one of the lowest, at about 18ft to the right of the sub near the kids bedroom it's peaking over 80db.
I could place the sub near one of the couches if I get a longer cable and test it there, just the thought of moving it makes my back ache.
