Well i am running a jvc head unit 50x4 bout 5 months old and last week I bought a kenwood10 inch sub" and I am running a class ab q2150 alphasonik amp currently I am running the one sub bridged to the amp and for some reason when i turn the volume up to just like 17 on most songs the sub sounds like its bottoming out now my gain is barely up and the sub is 300 watt rms and 1000watt peak I mean is it just the sub that is garbage or is something wired wrong I have checked it over and over again the sub takes a box from .60 to 1.25 cft volume and im running 1.0 cft volume I mean I have everything to specs I think I mean a hundred and thirty bucks I know its a ten but should sound a little better than this any ideas would be appreciated?