Ultimate DIY Subwoofer. Let's Build The 18" Ultimax

In this video we will design & build a sealed subwoofer. We'll be using the 18" Ultimax subwoofer from, Dayton Audio. UPDATE FOR SUBSCRBERS: Yes I'm still planning to build Parts-Express kits, but unfortunately they are sold out everywhere. As soon as they are available again, we will pick right back up! Thanks for watching!!