Rockford still makes great stuff IMO, back in the day they were good and then went down hill when they started selling to Best Buy, they had a span of roughly 5 years where they were buying amps from Korea and as stated during that period they were not the Rockford they were 10-15 years ago, but a few years ago they started making their amps back in the USA their quality has risen back to what it was 10-15 years ago IMO even better.

The HX2 was a great sub I had 4 of them in a wall in an Accord however during the time frame of production of those subs is also when VT boxes and ported boxes of that style were becoming popular and now all of the manufacturers are making subs once again that will actually do what they are supposed to do in a box that you can fit in most cars and a lot less airspace, now obviously you can still use big ported boxes with the new subs, but my point is that if you were to take the HX2 and put it in an average sized sealed box and compare it to it's equivalent of today a T1 it is not going to keep up.

Also as someone else has stated that Rockford is being sold by Best Buy and a lot of the big box stores now days, well with any brand out there that anyone could chose if it is not installed properly, gains not set properly, box style and size chosen correctly for the customers personal liking and taste then it will not sound as good as it could, and this is exactly the reason why the big box can not get the power series equipment, so that they can preserve that reputation.

I agree with someone else that the P1 are pretty much just garbage and sound more like a mid bass, however anything from the P2 and up I think is great and comparable or better than almost anything else on the market at their respective price points. As for the amps their are still people today using Rockford Power series for competing in SQ so they can't be too bad.

To answer the original question I would have to say that something probably hit the cone of the woofer, at the shop we have subs open and all over the shop and people always insist on playing with them and pushing on them and tapping them and what ever else they can do to finger fuck them and in the past two years I have only seen one of them crack.