ok well the sub i picked is a AV123 birds eye maple 10" sealed with a dayton 240 watt amp. The sub is brand new and the amp is brand new. I was searching craigslist and a person local had this great deal. So far I am very impressed. I wanted a sealed box and not a ported box. I just do not think ported boxes sound that great and reproduce the bass I am looking for. As I play with it more I will continue to give my review. One question I do have is how can I prevent from blowing up the sub. What are some things I can watch out for to make sure I am not pushing the sub to hard?