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How does a 4th order bandpass work?
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<blockquote data-quote="mrj858" data-source="post: 8794067" data-attributes="member: 634131"><p>The “ported” chamber is more of a loading chamber….have you ever yelled in a tunnel or hallway and it seems louder? That’s how the ”ported” chamber of bandpass 4th order works….the “port tuning“is where the roll off point is….the sealed section dictates how it’ll sound I.e how low itll play etc….that’s why sub choices matters….low FS mid to higher Qtc subs with good excursio works better to get an optimal Fc and since it’s sealed the low frequency roll off isn’t as drastic as with a ported box and controls the cone better….that’s why theyre tuned higher but still play low….cabin gain helps a ton with usable bandwidth as well as manipulating the cabin with doors opened vs closed vs windows up or down etc….</p></blockquote><p></p>
[QUOTE="mrj858, post: 8794067, member: 634131"] The “ported” chamber is more of a loading chamber….have you ever yelled in a tunnel or hallway and it seems louder? That’s how the ”ported” chamber of bandpass 4th order works….the “port tuning“is where the roll off point is….the sealed section dictates how it’ll sound I.e how low itll play etc….that’s why sub choices matters….low FS mid to higher Qtc subs with good excursio works better to get an optimal Fc and since it’s sealed the low frequency roll off isn’t as drastic as with a ported box and controls the cone better….that’s why theyre tuned higher but still play low….cabin gain helps a ton with usable bandwidth as well as manipulating the cabin with doors opened vs closed vs windows up or down etc…. [/QUOTE]
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How does a 4th order bandpass work?
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