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<blockquote data-quote="trumpet" data-source="post: 8549288" data-attributes="member: 628688">I have a hunch that there may be a couple of factors regarding the enclosure that are causing the problem.1) The volume is too large.2) The port volume is too large.This depends on whether your bass in the music is actually playing well below 30 Hz. The reason I say this is because the port, should it be of an appropriate size for the power applied, should be minimizing cone movement at Fb(30 Hz). The excursion will gradually increase as you move away from 30 Hz in a range from 1/2 octave below to 1/2 octave above Fb.The math for the lower range is 0.75 x Fb. The upper end of this range is Fb x 1.5. That is 22.5 Hz through 45 Hz for the port to make most of the sound and to keep the subwoofer excursion well under control. Above ~45 Hz the sub acts like it&#039;s in a sealed enclosure. Excursion rapidly increases below the upper 20s range, although with only 800W RMS split between two subs that really should not be a problem with normal music. Most music has little or no information below 30 Hz.[MEDIA=youtube]flu6KsCqLS0[/MEDIA]</blockquote>

[QUOTE="trumpet, post: 8549288, member: 628688"] I have a hunch that there may be a couple of factors regarding the enclosure that are causing the problem. 1) The volume is too large. 2) The port volume is too large. This depends on whether your bass in the music is actually playing well below 30 Hz. The reason I say this is because the port, should it be of an appropriate size for the power applied, should be minimizing cone movement at Fb(30 Hz). The excursion will gradually increase as you move away from 30 Hz in a range from 1/2 octave below to 1/2 octave above Fb. The math for the lower range is 0.75 x Fb. The upper end of this range is Fb x 1.5. That is 22.5 Hz through 45 Hz for the port to make most of the sound and to keep the subwoofer excursion well under control. Above ~45 Hz the sub acts like it's in a sealed enclosure. Excursion rapidly increases below the upper 20s range, although with only 800W RMS split between two subs that really should not be a problem with normal music. Most music has little or no information below 30 Hz. [MEDIA=youtube]flu6KsCqLS0[/MEDIA] [/QUOTE]

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