Been running this sub for 6 weeks now in a sealed enclosure. One of the more impressive sealed subwoofers I’ve used. Building a ported enclosure for it this week. 3.75 cubes at 30 HZ. It seems to be very well suited in its sealed enclosure so I thought I would shoot for a lower port tuning and see how it does. I don’t have any TS parameters to model it, so it will be a little trial and error doing it ported. 3.75 seemed like a decent middle ground to start with in comparison to other 15 inch systems I’ve modeled and built.