Ever since getting into audio (@1977) basic speaker theory says that when using the same size woofer and same enclosure volume an acoustic-suspension configuration (i.e. sealed) will go lower frequency-wise than a bass-reflex (i.e. ported) design. But over the last few years, I see more and more people writing that the ported configuration will have the more extended bass.* But except for active EQ systems, I have not heard of any new/significant developments with either design, so to me anyway this increasingly common viewpoint is more a result of mis-information than actual fact, worsened by the fact that the internet allows such information to be spread quicker than ever before. Any thoughts? Btw I realize sealed designs are in general less efficient and usually produce less bass (volume-wise) than an equivalently-sized ported speaker. I am really more concerned here with the bass extension issue. * IIRC from my speaker-building days, a ported design can go lower when its enclosure is optimized for that particular woofer but that meant a much larger enclosure volume when compared to a sealed design using the same size of woofer. This is the main reason Henry Kloss and Edward Villchur designed the acoustic-suspension system, so people wouldn't have to deal with those enormous cabinets one sees in 1950s vintage speaker advertisements.