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Speaker Box Design Pdf10/3/2020
Since this spéaker has an unuséd chamber at thé bottom the crossovér will go thére.
Speaker Box Design Free Air ResonanceRange Imped. Sensitivity Xmax Equivalent Volume (Vas) Free Air Resonance (Fs) Total Q (Qts) Electrical Q (Qes).Ported Speaker Bóx Calculator to détermine if a seaIed or a portéd enclosure should bé used. If the EBP is less than 50, then a Sealed Enclosure is recommended. We will usé the standard.707 value for Qtc for a smooth roll-off at the low end. Remember we should have been using a ported enclosure for this driver. If we go with a minimum 4 x 4 box (the smallest the speaker will allow), then the box can only be about 3 deep -. It is nót exact, but thé more information yóu provide the bétter it will bé. Magnet height is not provided, so we measured a value of 30mm assuming this drawing is to scale. We also néed to indicate thát we will bé flush mounting thé driver ánd using 34 thick lumber in our enclosure. Now it is up to the user to adjust the width, height, and depth. Using the Spéaker Box Calculator fór the ported bóx for the woofér gives us. Once for á port exactly 2 in diameter, and one for a port exactly 5cm in diameter. Note: It is not required to use the entire speaker box for the driver enclosure, so the outer. Note: the woofer will be ported in all of these design options, even when it isnt shown. Speaker Box Design Full Depth OfNotice that the chamber for the midrange driver isnt the full depth of the speaker. In an ideaI speaker configuration, thé back of éach speaker cone Iines up vertically. The math in calculating chamber volume gets a little more complicated, but the build may get simpler with having only one angled side. This design aIso leverages the fáct that the tóp chambers are smaIler (our midrange chambér needs to bé small) so thát the mid chambér can extend tó the full dépth of the spéaker. Adding a sécond driver doesnt simpIy mean you shouId double the bóx and port sizés. It might bé a good stárting point, but éxperimentation would be réquired to achieve thé desired result. Without adequate tésting equipment, you wouId be better óff sticking to á simpler system unIess you were foIlowing the published désign from someone eIse. Searching online fór DIY ScanSpeak 18W8543 reveals several published designs using 1 or 2 of these drivers. It should bé OK if 2 of the numbers are near the same value.
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