This is my second attempt to design and print a decent sounding speaker box. It is designed for a 4" full range speaker with an fs around 90-100Hz. Tested fitting with

• Dayton Audio RS100-8 4" ref driver (https://www.amazon.com/gp/product/B00JZTE00I)
• 1.78" cutout terminal binding post (https://www.amazon.com/gp/product/B00P5Z78F0)

Apply epoxy glue in the grooves to ensure an air-tight seal, and tighten with clamps for 24 hours for the glue to cure

Uploaded STL is for left speaker. Mirror image all three parts for right speaker