Allow me to introduce myself, my name is Yuriy and I live in Minnesota. I am trying to learn as much as I can about HTS and speakers in general. My goal is to build Sealed Subwoofer Box, 2 Towers and 2 book shelf speakers. As of right now I only know what tweeters, Mid-range, and woofers I would like to purchase. What I need help with is calculating the volume for the towers and center speaker. I know how to do the calculations if I have one speaker, but I have a lot of difficulty figuring out how to properly calculate the interior volume of a tower with multiple speakers. I can provide all the specifications of the speakers that I have in mind (including the Sub).

Thank you in advance for all the help.

Thank you in advance for all the help.