Posted September 24, 200816 yr What size ports are you guys using for your Q's? I'm building a custom fiberglass enclosure for my standard cab and i need some info on what people saw was the best result. I will be using round ports.To sum it up, what size diameter,length port do i need to not have port noise and have excellent sound.I was going to build it exactly to 2.5 cuft with displacement and port. Should i make the enclosure smaller? what are peoples views on this-Thanks