Best Subwoofer Box Design for Deep Bass
The Design Sequence. Determine size of enclosure. Calculate and subtract driver, brace and port (if ported) displacement from enclosure volume. Finalize driver selection. Step One: Determine size of enclosure. This is the easy part. Get a tape measure and get in the vehicle. How Does Our Subwoofer Box Design Calculator Save Your Time? Imagine how much time you will need to calculate the length of a port by its area and the net volume of a box, then calculate the occupied volume by the port, add it to the net internal volume of a box, and only after that, calculate the dimensions of a box, taking into account the material thickness.
When you are looking into how to design and build a subwoofer enclosure, there are several things you need to take into consideration. The vented enclosure—or ported enclosure—is a more efficient choice. These boxes channel the sound waves from the speaker from both the front and rear and help with making better sound by providing a lower bass reproduction and a low distortion level.
However, these systems are also much more complex to build than the sealed enclosures. These boxes separate the sound waves in the front from in the back. When these waves are not separated they tend to cancel each other out. The sealed box is the most popular choice due to excellent dampening, power handling, and ease of design. When designing a subwoofer enclosure, the first thing you need to do is measure the space you will be placing the how to clean alkaline battery acid off electronics. The space you want to put the box in will greatly narrow down the choices.
For instance, a inch subwoofer typically needs cubic feet of interior space, but you may need to add a bit of extra space to ensure an easy, but snug, fit. Therefore, the box will need to be 2. The next step is to decide what shape to use and determine the internal volume of that shape. You can then get the best sound and also to be sure that you have the correct internal volume for your speaker.
Below are the equations for the most popular shapes to help to calculate the internal volume needed. There are only two types of materials you should be using: fiberboard and plywood. Fiberboard will minimize panel vibrations due to its density, which really makes it the better choice. However, plywood is a good option if for some reason you cannot get fiberboard. Cut all of the pieces to the correct sizes for the interior volume you have chosen.
Cut the holes for the what to make with old baby clothes. Once everything is cut, do a mock-up of the box before you build it to make sure everything has a nice tight fit.
Written by Piyush Jain. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with how to design subwoofer box of hands-on experience.
Charles Ouellet. What You'll Need. Fiberboard or plywood. Carpet optional. Tape measure. Carpenters glue. Caulking gun. There are two types of box designs: vented and sealed. Projects For Beginners. I'm building a subwoofer enclosure for my vehicle with double baffle and wa Read More. I'm making a subwoofer enclosure out of MDF with recessed baffle, and will How test a coaxial cable for issues?
My subwoofer is not working and to eliminate the issue, I like to see if th Powered Subwoofer Connection. Hello, I am trying to. Related Posts Owner: designing and building a home. Can anyone point me in the right direction to start learning about creating I have a Dish receiver to a 30 year old TV. It works good. I have a subwoof How to design subwoofer box you run this t How to build a golf green.
Does anyone have experience building a golf green in their yard? I am ju Popular Articles. How to Make How to get around blocked sites at school 2012 Subwoofer Enclosures. By Charles Owen-Jackson. How to Install Truck Subwoofer Boxes.
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Free Subwoofer Box Design Software
Build a ported box, sealed box for your low-frequency speaker. Make a subwoofer enclosure plan. Calculate a speaker box volume, port length and other parameters without getting confused in formulas. 8 inch Subwoofer Box | Ported | Pipe on the Right Panel. 10 inch Subwoofer Box | Ported | . After you save your driver, click on the create new project button, find, and select your subwoofer. After the window loads, the first option to change is the number of drivers. Change this if you are using more than one subwoofer. The placement setting can be left at normal, and then click next. The next step in designing a subwoofer box is to measure the width, height, and depth of space available in your car to adjust the subwoofer box in. If the box is in wedge-shaped, then you must have to consider the depth at the box’s top and bottom for adjusting it in the available space. Draw a Sketch of Subwoofer Box.
Please use proper safety equipment and procedures when using power equipment. The following information is available for you to use at your leisure. When it comes to selecting an enclosure type to get the best sound from your woofer and matching it to your taste in music, it can be a little confusing.
The purpose of an enclosure is to improve bass response and prevent woofer damage from over-excursion. There are a few things you will need to consider before making your final selection that will ultimately affect your choice in subwoofer enclosure style.
Here are some of the key points you will need to consider:. Once you have determined the above conditions, you will then be able to make a choice that will get the best bass response. The next sections will outline the most popular types of enclosures to help you make a selection that is right for your listening tastes. An infinite baffle is not necessarily an enclosure. This can be a flat board with the woofers mounted to it and then attached to back of the seat of a sedan.
Another example of infinite baffle is how speakers are mounted in the rear package trays of most sedans. The speakers have no enclosure and the speakers are mounted facing up in the package tray. Many vehicles have subwoofers mounted in the rear package tray infinite baffle right next to the full range speakers.
Infinite baffle mounting is often considered the best overall sounding of all the examples we are going to talk about. They do not have an enclosure that will change the way the woofer naturally sounds. When mounting woofers in an infinite baffle configuration, you must have a woofer that is capable of operating in an infinite baffle or ported enclosure.
You will need to make sure that you seal the mounting baffle as good as possible to the vehicle so that the sound waves from the rear of the speaker cannot reach the front of the speaker to cause cancellation. Remember that bass can travel through anything that is not solid such as the rear seat foam and even other speakers that are mounted near the woofers.
Any areas not sealed between the front and rear of the baffle will decrease the amount of bass. An ideal infinite baffle mounting can be a challenge due to the potential difficulty of sealing off the front and rear of the baffle. That is why it is important to have an amplifier which has a subsonic filter to eliminate any damaging frequencies reaching the subwoofer. Infinite baffle mounting does limit the total output of the woofer and its power handling.
That is why it is best to use a woofer specifically designed for this type of mounting configuration. You also have to make sure you have properly isolated the front and rear pressure waves with the baffle or you will have limited output and bass response.
Violet - large sealed enclosure Green - small sealed enclosure. They are usually built within a range of internal volume specified from the manufacturer. The internal volume will vary depending on the type of sound you are trying to achieve. Sealed enclosures can have large or small internal volumes with no ports or vents in the enclosure.
The air inside the enclosure works as an air spring to control cone movement. When choosing the proper volume of sealed enclosure for you tastes, you will need to consider the following: A large sealed enclosure will have a smoother output with deeper bass but may also limit power handling because woofer cone has less control at lower frequencies.
You must make sure that your amplifier does not produce more power than the woofers is rated to handle in this size of enclosure. This type of enclosure is usually used when you are trying to reproduce music very accurately at a moderate volume. Sealed enclosures are one of the most popular box designs for someone that is looking for very accurate sound reproduction. Sealed enclosures are usually used when you want loud music reproduction with very good cone control.
For example, small sealed boxes are often designed for the older rock, hard rock, or speed metal. These genres of music usually have a good amount of drums in the recording and do not have a lot of very deep bass information in the recordings. The woofer will handle a large amount of power because the enclosure will limit the cone movement at the lower frequencies which could damage the speaker. They will not have as much of the punch as a smaller sealed enclosure but will play lower bass overall.
They will also take up more space in the vehicle since they require more air volume. They can reproduce low bass response that is very smooth and natural sounding. This is a smooth gradual roll off that gives them a very good response curve and will not have an excessive peaks in output at certain frequencies.
A Bass reflex enclosure also referred as ported or vented enclosure has a port or vent that will increase output at certain frequencies. This type of enclosure is more complicated to construct. The vent will combine the rear side of the woofers output to the front output of the speaker. It can be tuned to specific frequencies which allow added output around the tuning frequency.
Ported enclosures are very popular because they can dramatically increase the output at specific lower frequencies. This can be an advantage when extreme output levels are desired or if you are wanting to maximize the output of a subwoofer with a smaller power amplifier. As with anything, there are both good and bad things to consider. To achieve the most output, you will need a very large ported enclosure.
This will take up more space in the vehicle. This is very rarely discussed but is very noticeable with large ported enclosures. A larger ported box will have more group delay because of the size of the enclosure and its design. This will have a softening effect on the bass. A large ported enclosure can have substantially more output but at the cost of accurate sound quality. Clear as mud? Glad you understand. Ha ha. Ported boxes have another set of challenges. This means they will limit the lower frequencies the enclosure can produce twice as fast as a sealed enclosure.
The advantage of the ported enclosure is it can play louder before the lower bass starts to roll off. Ported enclosures are often much larger than the sealed enclosures to get them to produce very low bass frequencies. The other trait of ported enclosures is they have no control of the driver movement, called excursion, below the tuning frequency. This means that below the tuning frequency of the enclosure, the driver will perform as if it was in an infinite baffle.
This is why smaller ported enclosures handle less power than larger ported ones. Smaller ported boxes cannot be tuned as low as larger ported enclosures. High power levels below the tuning frequency will overdrive the cone movement and damage the speaker. One of the key ways to control cone movement below tuning frequency is to use a subsonic, or infrasonic filter just like we recommend for infinite baffle. An adjustable subsonic filter is necessary to maximize your output and protect your speaker.
With proper tuning you will have incredible output from the enclosure with maximum protection of the speaker. When tuning a ported enclosure, you must make sure that you have the proper volume of airspace, the correct port area, and port length. One way to see if this is happening is to hold your hand or something over the port opening when playing at high power to see if the noise stops.
This noise can be reduced and is some cases eliminated by rounding or flaring the ends of the ports but in extremely small ports, the noise is unavoidable. The length of the port is also an important factor and relates directly to port area. For example, if you increase the port area to eliminate port noise, you must also increase the length of the port to keep the tuning to the same frequency. Now you have another challenge. Now it is a balancing act between size, sound, and power handling.
You want a ported enclosure to play as low and loud as possible but the louder and lower you want it to play, the more space it will require. Venting rules: When you use ports, you there are a few things to remember.
First and most important is the area and length are very critical for proper tuning. Changing either one will greatly affect sound quality, performance, and durability of the speaker.
The vent shape is not as critical as the total area of the vent. It can be round, square, triangle, rectangle, or any other shape as long as the total area is equivalent to what is required for that enclosure.
Multiple vents can be used if the total area is equal to the specified design. Also, you must keep the vents away from other surfaces. Just remember the vent must allow air to flow freely without obstruction from either end.
A straight vent is better than a vent that has to be bent or folded to fit into enclosure. Bending the vent will also restrict the airflow and will slightly detune the enclosure. Longer vents tune the enclosure to lower frequencies but require more airspace in the enclosure to compensate for their displacement. Small vent areas have shorter lengths but increase airspeed and can have port noise.
A symmetrically loaded bandpass enclosure is designed to pass the entire output of an enclosure through a vent smaller than the surface area of a speaker.
A bandpass enclosure uses both a sealed and a ported chamber. The woofer is mounted inside of a two chamber enclosure in the divider between them. One of the chambers is vented to the outside environment. The main advantage of a bandpass enclosure is to allow significant output through a small opening. They can also be tuned to provide increased output in a narrow band of frequencies. They do share a lot of the traits of both sealed and ported enclosures.
The size of the sealed chamber will affect the low frequency response. For deeper bass it will require more airspace, thus a larger box. The ported side tunes the upper frequency response and output level.