Custom project

I'm trying to build a custom box for the logitech z5500's subwoofer. I am not sure what the driver is but according to the internet it is a Tang Band WT-644F. But I can't find reliable T/S parameters for it since some change depending on the site. Can anyone help me? I could measure them on my own but I don't know how to do it. This is my first project.

Hi! If you’re new to speaker box design, measuring speaker parameters may not be an easy task for you. It’s better to find someone in your city who can help you with the measurements.

You can measure the parameter with Clio Pocket. But if you know the measurements of the original cabinet. Use that as your start..