Randy. I remember that sweet looking graph. What we don't have to compare are measurements from the other seats which I'm certain would show smoother response with the 350s than without. Also using the 350s you have far better headroom with its attendent lower distortion. In your earlier calibration you were dialling them in -5db lower as I recall which is significant. Reads like you have found the best placement for now.

To all readers, keep in mind when looking at Randy's charts that the SMS graphical mapping function is off by 3hz for response less than 25hz ie the graph is shifted 3hz to the right of where it should be. The 600 brickwall filter should start sloping sharply at less than 19hz.

John