I guess it would be cheaper than buyin a new sub. for the most part i like it i'm just afraid it wont do as good on the heavy rock stuff anymore after i port it. I have no doubt rap will be louder after porting. I have heard these do good in bigger boxes and i printed out 2 plans for the above box, so i guess i will try it out. Is it possible that my amp would not be letting it hit hard enough low or the fact im only giving it about 300 w rms right now?