Have you checked out the sub yet? Could be loose dustcap or spider or shims left in the gap...
I'm up by Six Flags if you want it reconed and don't want to send it off.
Hey everyone! My friends Sundown Zv4 18 is clipping at like 10 percent of gain. Can the recone he just had done be doing it. The motor is good ect. Everything is checking positive and good.