bought this sub as I am building a SQ system in my car, great price so I went with it...(a wise choice). After break-in, this sub really impressed me!! I have 400 watts running to it and it handles it with ease. It is fast and light as a good SQ sub should be. I was kinda uncertain at first with the ported specs that came with it..it seemed centered kinda in the low range- but went with it as a starting point. Im very happy with the results! punchy and tight, not boomy or having over-hang. This sub should be selling for alot more $.. its that good. good build quality.