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<blockquote data-quote="FtheNutHuggers" data-source="post: 7452587" data-attributes="member: 632254">Everything depends on driver parameters and the maximum external dimensions of the enclosure (since we already have your requested bandwidth....basically the 37-74Hz octave). None of the older rap got very low and very little metal goes below there.....and whatever does is extremely rare. It&#039;s doubtful that you&#039;ll want to handicap the entire bandwidth and sensitivity just to grab a few obscure notes once in a blue moon. Correct me if I&#039;m wrong there, of course.Make sure that if you mention maximum outer dimensions that you are leaving room for the driver to mount on the front and has room for excursion (typically 5/8&quot; above the peak of your surround is plenty).Bass Box Pro, WinISD and LEAP all fail to be able to account for shape of enclosure, location of driver and location of &quot;vent&quot; if it is actually a vented alignment that would even achieve the requested bandwidth at the target listening position. They cannot account for vehicle geometry (which is just as much responsible for shaping the response curve as the enclosure the sub is in). They cannot account for the proximity of the enclosure to the nearest vehicle panel which in some cases can create a tapping effect. Nothing accurate about any of them.</blockquote>

[QUOTE="FtheNutHuggers, post: 7452587, member: 632254"] Everything depends on driver parameters and the maximum external dimensions of the enclosure (since we already have your requested bandwidth....basically the 37-74Hz octave). None of the older rap got very low and very little metal goes below there.....and whatever does is extremely rare. It's doubtful that you'll want to handicap the entire bandwidth and sensitivity just to grab a few obscure notes once in a blue moon. Correct me if I'm wrong there, of course. Make sure that if you mention maximum outer dimensions that you are leaving room for the driver to mount on the front and has room for excursion (typically 5/8" above the peak of your surround is plenty). Bass Box Pro, WinISD and LEAP all fail to be able to account for shape of enclosure, location of driver and location of "vent" if it is actually a vented alignment that would even achieve the requested bandwidth at the target listening position. They cannot account for vehicle geometry (which is just as much responsible for shaping the response curve as the enclosure the sub is in). They cannot account for the proximity of the enclosure to the nearest vehicle panel which in some cases can create a tapping effect. Nothing accurate about any of them. [/QUOTE]

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