[Mark Holmes]

I would appreciate a bit of help here.

I have a new DIY sealed sub that I am integrating into my system. I am using a Bassis and a BFD.

What I am trying to get is a response curve flat to 10 Hz. The Bassis is incredible in boosting the low end. And I am working on the BFD to smooth things out. I am almost there but...

First question. What does a driver sound like when you reach excursion limits?

Next, Why does it seem that when I limit frequencies above 20 Hz that the output below 20 Hz increases?

Finally, I have a 4 year old Rat Shack meter, and am still confused as to what correction factors I should be using below 20 Hz.

Down around 10 Hz, I mostly hear things shaking in the room.

Thanks,