I've only had it for like 10 days and the darn thing stopped playing today on the way back from lunch!
PA880 with gain set at 0, boost at 0db, and crossover at 90hz.
Volume on the car was about half. Was playing 6foot, 7 foot by lil wayne.
All of a sudden the bass cut out and all i heard was what i can only describe as sparking across a coil. I got out and looked at the sub, it looked fine, pushed in fine without scraping, and moved freely. All the sound was coming from behind the sub.
Sucks... I don't think I was overdriving it, and it was only being played for about 2 minutes (lunch drive is very short). At first I thought maybe the pole piece separated from the woofer cone, but when I pushed the cone in there was no contact with the pole that sounded like it was moving... OH while typing that I realize that maybe the pole piece did separate and pulled into the subwoofer and isn't coming back out, hence the rattling. The voice coil might just be sitting inside the bottom of the sub and sparking since it is no longer suspended.
What do you guys think? I already called Polk CS - I'm going to swap the sub out tonight for a spare one I have sitting in the garage (Kicker 10) to make sure its not the amp flipping out.
I'm kind of sad, every sub I've ever owned has been played longer, harder, and with more intent than this sub with no problems, and with less power. The PA880 is 500wrms @ 2ohms, this sub is 2 ohms with less power handling. I know I didn't clip it, so I doubt it was underpowering. (I can't stand clipping speakers). I hope this is just a fluke, Polk speakers have always been good to me, you guys know how adamant I am about Polk and this forum :).