Hi,
just want to say I bought this sub for Ht and non accoustically recorded music (ie RNB HIP HOP for me) and it does the job! It brought, to the JBL 4425 at the front, the ompfff they do not really have, being at -3dB at 45 Hz, and interestingly this bass presence has balanced the whole spectrum: the highs were a bit harsh because of the compression ; it is not the case anymore.

I live in a flat, and if my neighbours were secretly ploting for killing me so far, I think they have now every reason to go through !