Well I don't really mean to cause a Skar bashing thread, but I ordered (2) IVX 12's from Skar from the "yard sale". One was perfect nice and clean, the other one was all dented at the outside rim and the magnet was sitting at an angle...literally. I believe it was dropped, because the box it was in looked perfectly fine. Anyway I would return the sub but I managed to bend the magnet where it should be so the voice coil isn't scraping anymore. Plus I only paid $110 for both subs shipped. Anyway i'm really impressed with how these subs sound. I'm only running a USA-100 with them but they sound very clean. I built a ported enclosure to the specs on Skars website. I previously had (1) Audiobahn AW1500Q. (these are actually decent Audiobahn subs. no flames the front is all black). The Audiobahn was louder than the 2 12's but the 12's sound better. I'm sure once I finally get a good 1000 watt amp the subs will sound much better. Anyway The yard sale was "AS IS" but "guaranteed working", So I doubt Skar will make this right, and by paying the shipping to return one of them it will totally defeat the reason I bought these subs in the first place.