Speaker Enclosure Design, free speaker enclosure design software downloads.
Designing and Building a Speaker Box Example. This example of a designing a speaker box makes use of many of the calculators found on. You should also review the Speaker Building Guide. The drivers I chose. Driver. Model. Size. Freq. Range. Imped. Sensitivity. Xmax.
Tweeter. D2. 00. 8/8. Hz. 8 ohms. 90 db SPL Mid. M/8. 63. 64. Range. Imped. Sensitivity. Xmax. Equivalent Volume (Vas)Free Air Resonance (Fs)Total Q (Qts)Electrical Q (Qes)Tweeter. D2. 00. 8/8. 51. 22.
Hz. 8 ohms. 90 db SPL 1. Hz Mid. 13. M/8. Ported Speaker Box Calculator to determine if a sealed or a ported enclosure should be used. Ported calculator uses the formula below.
Measurement Data for Simulation Programs. Madisound Speaker Components has been providing design assistance and selling loudspeakers & other speaker parts to.
If the EBP is less than 5. Sealed Enclosure is recommended.
Above 9. 0~1. 00 and a Ported Enclosure is recommended. Between 5. 0 & 9. To keep this example interesting. I am going to ignore these results and use one sealed enclosure and one ported enclosure to show the differences between the two.
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We will use the standard . Qtc for a smooth roll- off at the low end. The sealed box midrange driver gives us. Remember we should have been using a ported enclosure for this driver.
If we go with a minimum 4. The thickness of the wood will make the box larger. It is not exact, but the more information you provide the better it will be. Magnet height is not provided, so we measured a value of 3. We also need to indicate that we will be flush mounting the driver and using 3/4. Now it is up to the user to adjust the width, height, and depth.
The width and height of the box must be at least 4. When using the ported speaker box calculator, the driver size (Effective Cone Diameter - D). Using the Speaker Box Calculator for the ported box for the woofer gives us. Our calculator gives us a . These numbers are not the same. Once for a port exactly 2.
Some possible options are shown below. 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 isn't shown. Notice that the chamber for the midrange driver isn't the full depth of the speaker. Side view of an alternate design where the speaker is angled back. In an ideal speaker configuration, the back of each speaker cone lines up vertically. When flush mounted to a vertical piece of wood, the woofer will be a couple of inches behind the mid & tweeter.
Another side view alternate configuration. In this design, only the front board is angled.
The math in calculating chamber volume gets a little more complicated, but the build may get simpler with having only one angled side. There are also less balance problems. 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.
In the final configuration there are two 6. Two woofers could be used to help with the fact that the woofers have lower power handling than the other drivers in this system and two woofers will also help in the low end frequencies. Adding a second driver doesn't simply mean you should double the box and port sizes. It might be a good starting point, but experimentation would be required to achieve the desired result. Without adequate testing equipment, you would be better off sticking to a simpler system unless you were following the published design from someone else. Searching online for DIY Scan.
Speak 1. 8W/8. 54. The width, height and depth should not be the same value. It should be OK if 2 of the numbers are near the same value. Account for the size of the internal bracing and speaker driver displacement when determining the size of each chamber - again not a problem because our calculator does this for us. Account for the size of the crossover when determining the size of each chamber.
Since this speaker has an unused chamber at the bottom the crossover will go there. This allows for changing/repairing the crossover without taking the speaker apart.