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<blockquote data-quote="Buck" data-source="post: 8870378" data-attributes="member: 591582">The nature of the way ported works is different, because you can force a system Hz peak.&nbsp; With sealed, you rely on a very limited Hz peak tuning option, which you can only change by changing sealed airspace, which often can&#039;t high power play low enough for some, because the box has to be too big and you lose mechanical sub handling to get a low enough Fc/Fsc (sealed peak resonance you want).&nbsp; For sealed, look at Fc or Fsc and Qtc, which is basically peak frequency and severeness of roll off.Orrr....with ported, you can just hard tune those JL&#039;s to 32 hz or so and play strongly down to 30 and maybe high 20&#039;s, and play up to 60&#039;s, 70&#039;s, maybe 80&#039;s well, if you do it right, and it&#039;ll be louder, overall.&nbsp; Going ported vs sealed depends on what type of music you listen to, but ported is almost infinitely more specifically tunable than sealed.&nbsp; Some people who are really SQ fanatics tune their ported boxes down at 25-28 hz.Ultimate SQ IMO is infinite baffle (which can be very difficult) or easier is a transmission line, but those can be huge and often are mechanically power limited, unless you have a specific IB capable woofer or something, but they are very efficient for the power inputted and have somewhat of a lower box/port pressure, more natural sound.</blockquote>

[QUOTE="Buck, post: 8870378, member: 591582"] The nature of the way ported works is different, because you can force a system Hz peak. With sealed, you rely on a very limited Hz peak tuning option, which you can only change by changing sealed airspace, which often can't high power play low enough for some, because the box has to be too big and you lose mechanical sub handling to get a low enough Fc/Fsc (sealed peak resonance you want). For sealed, look at Fc or Fsc and Qtc, which is basically peak frequency and severeness of roll off. Orrr....with ported, you can just hard tune those JL's to 32 hz or so and play strongly down to 30 and maybe high 20's, and play up to 60's, 70's, maybe 80's well, if you do it right, and it'll be louder, overall. Going ported vs sealed depends on what type of music you listen to, but ported is almost infinitely more specifically tunable than sealed. Some people who are really SQ fanatics tune their ported boxes down at 25-28 hz. Ultimate SQ IMO is infinite baffle (which can be very difficult) or easier is a transmission line, but those can be huge and often are mechanically power limited, unless you have a specific IB capable woofer or something, but they are very efficient for the power inputted and have somewhat of a lower box/port pressure, more natural sound. [/QUOTE]

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