HI- I recently bought at 5.1 Dolby digital speaker set up. the JBL SCS150, system. I would post a link to the JBL website but i don't seem to be allowed to yet. Regardless, After using for a few weeks i noticed that the Cone (i think that what it is called) of the sub had a indention. And was screwing up the way the sound Hit. It is a 150W 10" sub. SO i am looking into replacing just the speaker and keeping the box and all that other good stuff the same. I am using a JVC 8020rx receiver (again i would like to post a link) to push it. SO my questions are as follows: 1) what should i be looking for when buying a new sub to replace my old one. I am thinking Ebay is where i will find the best deal. 2) what brand would work well with my current set up. 3) what should I look out for, and how do i install the new sub. Is just clipping and re-attaching those 2 wires? Thanks for your time.