SteveOrtiz1985

If you figure 2.5 cubes per 18" in a 2:1 ratio that's 15 cubes plus displacement. Optimally you need about 22 gross cubes for a 4th order. What are your dimensions?

27 isn't too low. Here is a video of m 4 X 18"s low note on this song is 22hz http://youtu.be/k73xq6vjjn0

The x series do really well in 4th order enclosures. About 2.5 cubes per sub sealed in a 3:1 ratio tuned to 40hz. You'll have no problem hitting 10 hz (if that's what you want)