[Colt4587]

I think I did it right, or at least I hope I did...let me know if I need to change anything, I did give the sticky a read about posting graphs....

Dayton 15" HF driver in a 6 cubic foot box with dual 17" flared ports.

Is there anyway to fix the null at 44hz?

Let me know what you think!

 

[Colt4587]

Here's the waterfall...(granted I can't read them very well)

 

[JohnM]

Trying different positions is the best option for that sharp dip, it would also be worth measuring to a higher frequency, e.g. 200Hz.