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<blockquote data-quote="audioholic" data-source="post: 3370693" data-attributes="member: 549629">You are right. That was confusing.In a ported system, the cone DOES moves the least at or near tuning. This is due to the box &#039;choking down&#039; on cone motion due to pressure changes that are frequency dependant. But this is also where output is the highest, because the box is at its most efficienct point in terms of frequency. So yes, an arguement can be made for there being less distortion produced directly by the driver while playing near tuning in a vented box, less excursion mans more coil in the gap means less distortion produced. But vented boxes tend to produces such a non-linear response that, once mated with in car acoustics, becomes a frequency rollercoaster. At that point, people pure enough into SQ to worry about BL distortion levels produced based on excursion, are already gonna be complaining about frequency response, group delay, etc etc.IOW, it doesn&#039;t really matter. The generally smoother freq response shown by sealed applications in-car make it the more popular choice for SQ concerns.Cheers.</blockquote>

[QUOTE="audioholic, post: 3370693, member: 549629"] You are right. That was confusing. In a ported system, the cone DOES moves the least at or near tuning. This is due to the box 'choking down' on cone motion due to pressure changes that are frequency dependant. But this is also where output is the highest, because the box is at its most efficienct point in terms of frequency. So yes, an arguement can be made for there being less distortion produced directly by the driver while playing near tuning in a vented box, less excursion mans more coil in the gap means less distortion produced. But vented boxes tend to produces such a non-linear response that, once mated with in car acoustics, becomes a frequency rollercoaster. At that point, people pure enough into SQ to worry about BL distortion levels produced based on excursion, are already gonna be complaining about frequency response, group delay, etc etc. IOW, it doesn't really matter. The generally smoother freq response shown by sealed applications [I]in-car[/I] make it the more popular choice for SQ concerns. Cheers. [/QUOTE]

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