The math in calculating chamber volume gets a little more complicated, but the build may get simpler with having only one angled side. In this design, only the front board is angled.
Notice that the chamber for the midrange driver isn't the full depth of the speaker. Note: the woofer will be ported in all of these design options, even when it isn't shown.
The EBP of our midrange and woofer drivers are calculated as:īoth values are well above 90 and call for Ported Enclosures. The tweeter in our example is already sealed and doesn't require an enclosure.
Between 50 & 90 either type would work.Įfficiency Bandwidth Product (EBP) = Free Air Resonance (Fs) / Driver Electrical "Q" (Qes) Above 90~100 and a Ported Enclosure is recommended. If the EBP is less than 50, then a Sealed Enclosure is recommended. Ported calculator uses the formula below. Ported Speaker Box Calculator to determine if a sealed or a ported enclosure should be used. (with specifications provided by the manufacturer) are: The mid is 4" and the woofer is 6.5" in size, but this system is still capable of These 3 drivers might be smaller than what is expected of a typical 3-way system. This design is old and the characteristics of these drivers have since changed and/or been discontinued. The same 3 used on the Crossover Tutorial. You should also review the Speaker Building Guideįor this example, I picked 3 ScanSpeak drivers for a 3-way speaker. This example of a designing a speaker box makes use of many of the calculators found on belt/pocket clips, suspension elements for walls and desks, bases and contacts for charging current and data transmission, cable glands and much more.Designing and Building a Speaker Box Example A wide range of accessories offers you the opportunity to equip the enclosure with additional functions, e.g. These include battery compartments for AAA, AA, C, D and 9V batteries, the installation of standard displays, high protection classes in accordance with IP 54, IP 65, IP 66 and IP 67, screw pillars for electronic and mechanical components, recessed areas for protecting membrane keyboards and labels as well as recessed areas for interfaces etc.
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