i've taken a look inside, it is stuffed to the max, polk does a very good job damping and bracing their speakers, the cabinet does not resonate at all audibly, it is extremely well braced. are you saying more power would benefit it? also the sub seems to have plenty of headroom, enough that it will play for 1-2 seconds after i unplug it. i actually like this sub for the price i paid for it, it handles music very well and blends very well with the bookshelfs, at and above it's tuning frequency it seems very clean and tight, most all movies it has enough power to rumble my room and the rest of the house (it can be heard throughout the whole house) the only movie it seemed to struggle with was fight club, that movie has some serious LFE. it was also able to handle WOTW with the volume on the receiver cranked to -10 quite well. it was just fight club, especially the last scene where the building exploded, that movie has alot of subsonic rumbling, and at a very high level. on WOTW, it was able to generate enough LFE that it felt like my room was windy and i could feel it throughout my whole body, it seemed to be able to handle it OK. maybe it is just fight club. i've decided to not add a filter because most of the music i listen to, especially doom metal, have very low tuned bass guitars with harmonics reaching down to 15hz, while the actual base frequency of the lowest E string on the guitar (for this particular band) is about 35hz(so says audacity spectrum plotter), the 15hz harmonic certainly changes the shape of the waveform and helps form the overall sound. same with most of the Black metal bands i listen to, very low tuned bass guitars, the kick drums seem alot lower then a normal rock kick, it's just very bass heavy music. some of the bands include pipe organs as well, such as the intro track on becoming the archetype's terminate damnation CD. i think a filter would seriously compromise it. once finances get straightened out i plan on building a monster sub anyways.
