How to build a sub woofer speaker box
When building a subwoofer box, you'll need to do a little math before you begin cutting wood. Each subwoofer is designed to operate in a specific volume of enclosure. For your sub and sub box to sound good, match the size of the enclosure to that spec. Search for the box volume requirements for the subwoofer you're building the box for. Manufacturers of subwoofers list this specification in the manual or on their website.
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How to build a sub woofer speaker box
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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.
Basic Subwoofer Box Building Information
Learn all our advantages. Use our database for the fast design. Join to our community. Many users use our service to rapidly design their boxes and save time to spend it on really important things. The main goal is rapid, easy and accurate box design for your speaker. The service is available on both desktop and mobile devices.
How to Build a Simple Sub Box
To have strong bass in your car, you need to have a subwoofer. If you need a customized size or design, you can build a subwoofer box for your vehicle from scratch, and this is the cheapest way to make a box exactly like you need. To build a car subwoofer box, you need to consider several factors that will affect its design:. When you have the above information, you need to measure how much space you have in the car, determining any further adjustments to the size. Make sure you consider the suitable material, which in most cases will be either fiberboard or plywood. Besides, in some subwoofers, you will need a damping material like fiberglass, and if will decide to make a vented enclosure, you will need a plastic port. As an Amazon Associate, ImproveCarAudio will receive a small commission from qualifying purchases made through the links in this article. Tip: To finish a box and make it look nice, you will need a thin subwoofer carpet. But this is not all. You will also need some tools, like an electric drill , circular saw , and jigsaw cutter.
Main advantages
Standing waves are caused by the dimensions of the internal box cavity. DIY subwoofers are no different, put your best foot forward and eliminate simple mistakes. Often, these resonances are too strong to be damped by the acoustic damping and make their way back to the speaker cone and sent into the room as audible output. You can easily build speakers better than that.
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There are so many benefits attached to doing things yourself. Besides, building a subwoofer box yourself would save you a lot of money, and you'll also whip it up to your taste. Ready to create a cool subwoofer box for your Subwoofer? Then let's get kicking into it. When it comes to building subwoofer boxes, there are a few factors you should consider. Of course, you'll need to consider the size of the Subwoofer before you start to cut the wood into the shape of the Subwoofer.
Subwoofer Box
When building subwoofer boxes , it is important to choose materials that enable the piece of equipment to work effectively. There are six main types of materials you can use to build subwoofer boxes. MDF is the more common name for medium density fiberboard. This type of wood is a manufactured one. It is not created from a single piece of wood. It is widely available and ideal for use in making subwoofer boxes.
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This example of a designing a speaker box makes use of many of the calculators found on this site. You should also review the Speaker Building Guide for additional help. For this example, I picked 3 ScanSpeak drivers for a 3-way speaker - the same 3 used on the Crossover Tutorial. These 3 drivers might be smaller than what is expected of a typical 3-way system. The mid is 4" and the woofer is 6. The drivers I chose with specifications provided by the manufacturer are:.
No car sound system is complete without subwoofers. You can buy ready-made subwoofers from the market. If you want to customize what goes into your subwoofer boxes, you can buy them separately. Then, you can install speakers of your choice inside the boxes you buy. To get you started, here are a few online ready-made subwoofers for automobiles:. These subwoofer speaker enclosures by Atrend are constructed with careful attention to detail. You can get two options — the single vented or dual vented ones, to suit the available space you have.
Are you looking for the best subwoofer box design for deep bass? People who are passionate about music know the importance of each beat and each tune in creating an impact on the soul of the listener. The smallest changes in the pitch or bass of music or song can go a long way in creating a more ambient environment for the listener. Just for this purpose, there are tonnes of equalizers and customizable speakers available which allows us to make desired changes to our favorite music and make it more satisfying to our senses.
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