That top end crossover can make the top signal 90,180, or 360 degrees out of phase...as crossovers are named 1st order, 2nd order, 3 order and 4th order/360 degrees

It goes from a solid low end to shaking the windows in volume all while keeping a clear sound

After searching the internet I found that some folks (Probably much more expensive high end QSC or Mackie speaker owners) gave these Rockvilles bad reviews without ever actually trying them

Great sub covers the low end plus easy to take to gigs fits in my car no problem.

legs!It wasn't only loud, it was a great sounding bottom end

Two of these and a pair of 10" tops could probably support a dance floor of 80 people at a comfortable volume in a medium sized ball room, I imagine, but you might as well use an 18" if you're going to haul a pair of these, and get better low end

so I bought the a 1/4" stereo phone jack with a left and right RCA female ends, and 2 RCA

Gave 4 stars because it is powerful, but still somewhat low end.