I've always been a DIY sub woofer guy. I'm wanting to build a couple towers and wanted something kinda easy. So I was thinking about building two Line array towers using 16 Dayton ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm in each tower. Total height would be around 56". Another thing I was wondering is wiring. If I wire it in the diagram provided would I get a 8 ohm load. I think I will if I did my math right. But this is the biggest thing... The crossover. I have never built a crossover designed one or know what parts look like or what they do. Thank you for your help and information. If I get the help needed for the crossover then I will be building these in February and have a good Idea on the cabinets.