i built this box for 4 sa-15's in a yukon the box is 48x34x22 with .75 mdf the port is 14x14x16.5 . subs up port back . The problem is that it sounds like its tuned to 50-60hz .its only hits punch bass or high bass hard for example the highest note in "i put on for my city" non-chopped.
Any ideas here kinda confused?