It pops at anything above audible levels. Once the sub starts to move it pops and scratches. JL said I have a amp sensitivity problem, new sub confirms that was not the case. In eny event I paid like $300 for the damn thing and now all it is, is a big paper weight. I have never blown a sub in 15+ years of car audio and I usually buy high end stuff just for that reason. This was my first JL and my last. It sounded ok but definitly not worth the cost.
I want to get it refurbished and try to recoup some money, unless someone wants to buy it and confirm that it is blown and I'm not all wet. Thanks