You need a new sub, that one can not keep up with your other system components. I had one just like that I got in a deal, I buy and sell speakers and electronics all the time, and I test everything I get for capabilities and referencing. I live in an apartment and I set that sub up in my room and it was not enough for my demands either. I would look at HSU, Onix, or possibly SVS for another sub. Onix has the X-sub, which happens to be an 8", but it would easily outperform the yammy 8". If it were me I would get the HSU STF-2, another sub I have owned and sold. It isn't a monster sub, but more than adequate for a small room like yours.