[Mattk11]

Thanks for the link. That is pretty cool, but does it take the driver into account or does it not matter?

TC Sounds suggested to me an 8 cu ft box with 3 - 4 inch ports each 35" long to tune to 16.5Hz. I am curious why they suggest something so different that is typically done here. Everything on here is so big with larger ports. I read the LLT explanation but I am not sure of the difference that TC suggested and the larger box you are suggesting.

I am not sure if I want to tune it all the way down to 14 Hz, I don't think I can hear below 17 anyway.

Thanks
Matt