The sub is an Epik Castle (http://www.epiksubwoofers.com/CastleOverview.html)

I was very surprised by the results, so I took 6 or 7 seven reads -- and they all turned out the same. I guess there is giant 60hz null right at my listening position.

M60s (previously 22ti)
VP150
Epik Castle
Q8 Surrounds