I am one of those who generally believe that sealed is better for music. This is from my experience more than from any science. The best ported subs I have had a chance to listen to were dual SVS PC-12pluses. IMHO, while they were excellent for HT, they were not close to the quality of my sealed subs (Rythmik E15HP or PSA XS15se) for music! After researching posts from Josh Ricci, it seems that the perception of "good tight musical bass" is actually most often associated with a roll-off (which is more common to sealed designs). IOW, a roll-off at 30Hz will sound "tighter" than a sub that is flat to 20Hz. I am still wrapping my head around this, and hope to set up some good tests to prove it out; but it does seem that could fit my experiences. Another factor here is that without additional processing, any sub which is flat to 20 in an anechoic chamber is pretty much assured to have overblown low bass once you put it in a room (especially if near a wall or corner) which I would assume to only make matters worse! My personal experiences with the two following subs seem to support the idea of preference for roll-off vs flat instead of sealed vs ported. I am a fan of the ported Dayton Audio SUB-1200 as a high value (which starts to roll off at around 40Hz), and for music would rather listen to them than the PC-12pluses! I am not a fan of the sealed JLAudio E112's (which are flat to the low-mid 20's). With some very rare exceptions, the music I listen to does not involve anything below 35Hz, so I am unclear on why there is such an easily noticeable difference. IOW, if the sub is not used below 35Hz why should it matter what it does at 25Hz???