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Jbl speaker box drivers#
Jbl speaker box driver#

In the final configuration there are two 6.5" woofers.

This design also leverages the fact that the top chambers are smaller (our midrange chamber needs to be small) so that the mid chamber can extend to the full depth of the speaker. 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.

Another side view alternate configuration.

When flush mounted to a vertical piece of wood, the woofer will be a couple of inches behind the mid & tweeter. In an ideal speaker configuration, the back of each speaker cone lines up vertically.

Side view of an alternate design where the speaker is angled back.

Jbl speaker box driver#

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 side view of the same floor standing speaker.

We must remember to change to metric units in this calculator - all ScanSpeak numbers are in mm & liters. To calculate the speaker box volume, we will use the Speaker Box Designer.

707 value for Qtc for a smooth roll-off at the low end.Ĭalculating box volume and port size for a ported enclosure requires Vas, Fs, Qts, and the cone diameter. I am going to ignore these results and use one sealed enclosure and one ported enclosure to show the differences between the two.Ī sealed chamber will be used for the mid and a ported enclosure for the woofer.Ĭalculating box volume for a sealed box requires Vas, Fs, & Qts.

Jbl speaker box drivers#

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 Designing and Building a Speaker Box Example