Originally Posted by Stereodude
If you can bottom out the driver below the tuning point with the 2nd order you can either move the HPF up in frequency or steepen it. It's a little trial and error.
This kinda opens another can of worms for me. I didn't know bottoming out factored in to this. So taking from the statement you just made I'm going to make an assumption and you can tell me whether this is right or not.
I knew that I needed an HPF so that the woofer would not extend pass Xmax and move to far in or out. I'm guessing the term for this is called bottoming out. Assuming that statement is right, I never really new that term meant that. I thought you could damage a woofer without knowing it, meaning that the woofer could be flopping while playing loud music and you would not know that it was flopping. I thought bottoming out meant something else.
So just for clarification will you definitely know if you need a HPF by hearing the sound of the woofer bottoming our or could you still be damaging woofer without knowing it?
You say trial and error, so also I'm assuming that the sub bottoming out once or twice is not a problem, but constant bottoming out would eventually damage woofer?