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DIY For Audio
T L Loudspeakers
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<blockquote data-quote="Timber_MG" data-source="post: 9246" data-attributes="member: 18"><p>I have done a ML-TQWT to entend useable response of a high-efficiency 12...I found that placement of the batting was helpfull in optimizing the lower midrange. The other difference comes in with the greater phase shift in the port summing with the direct response and ensuing different roll-off (mild, but in this case mentioned I was surprized to see a system designed for 40Hz make it to 25 due to two room modes)..in the end the sub was crossed at 40 but becasue the client wanted to see excursion on his SDA 15 we moved that up to 60.</p><p></p><p>If you limit bandwidth for sub use or the like you can always do a tuned pipe, but often the extended bandwidth of a bass-reflex makes it very practical.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 9246, member: 18"] I have done a ML-TQWT to entend useable response of a high-efficiency 12...I found that placement of the batting was helpfull in optimizing the lower midrange. The other difference comes in with the greater phase shift in the port summing with the direct response and ensuing different roll-off (mild, but in this case mentioned I was surprized to see a system designed for 40Hz make it to 25 due to two room modes)..in the end the sub was crossed at 40 but becasue the client wanted to see excursion on his SDA 15 we moved that up to 60. If you limit bandwidth for sub use or the like you can always do a tuned pipe, but often the extended bandwidth of a bass-reflex makes it very practical. [/QUOTE]
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DIY & Tutorials
DIY For Audio
T L Loudspeakers
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