If you need to fill a stadium theater, you need cone real estate, and lots of it. If you just want a bit of thump and hum in a reasonable room, a high quality driver in a good enclosure is plenty. The links to the left provide more information on these systems, along with other information that will help you to design and build a subwoofer that meets your needs. Vented subwoofer enclosures are slightly more complicated as they introduce a port, or a vent. I really want to stay away from the thrown-in-the-trunk-sub-box look and have something more integrated to the cabin of my car, and I am wondering if building a box other than square or rectangular or a little away from the golden ratio” would affect much the way a subwoofer sounds in a car.
When these values are plugged into an enclosure design formula the resulting box size is 50% smaller than that for one of the same drivers in the same style box. In building a subwoofer box, one needs to understand that the primary strength of the box is in the joints, which are glued together using a reliable wood glue like Titebond II. Any other extra strength glue such as Gorilla Glue is absolutely unnecessary for subwoofer box building and provides no benefit. Drill several holes along the edges of the box and then fill the holes with carpenter’s glue.
Because of small box volumes the length of a port may be too long to fit inside the enclosure. As well as the box materials and drivers, you’ll also need an amplifier to power the subwoofer. Each has its own advantages and disadvantages, but it is probably one of the most subjective decisions that will be made during the whole subwoofer project. However, since naked TIMBER leaves something to be desired in the looks department, I suggest you checked in with GRAVITY FITMENT CENTRE-DEES 0315009032, to get some ideas on customizing a subwoofer box. Otherwise, a mono subwoofer channel can be derived within the crossover from a stereo mix, depending on the crossover make and model.
If you’re willing to invest your time to constructing a subwoofer enclosure, and are willing to devote the space in your home theater, a DIY subwoofer can give the ultimate performance. Just remember to subtract the volume of the wood used in the bracing from the total volume of the box. Next we marked the location of the port on the front of the box including the ¾” Port wall. We used a hand-held tube of silicone, since it would be tough to get a caulk gun down inside the box at this point. In addition, IB subwoofers can achieve perfectly flat bass response, which is impossible with most other subwoofer designs.
Vented boxes will usually expect the driver to have a somewhat lower Qts, and remember that Fs will need to also be fairly low since you cannot usually tune the box below that frequency. Linear long excursion capabilities combined with good cone control will provide high output low distortion sub bass. Apply adhesive to both box and carpet (spray 3M adhesive 77 or 90 works great).
The selection of the actual subwoofer driver must by necessity be considered throughout the process of choosing the actual type of enclosure. Note that sealed systems are generally a lot more tolerant of variation in box volume than are the other tuned-port systems such as the ported and bandpass systems. Slot style ports are another option and require more calculations, it is recommended that you use an enclosure building software to create this design, or refer to the speaker mfg.
Deep low frequency extension is a common goal for a subwoofer and small box volumes are also considered desirable. If you would like to use a vented enclosure, but the box designs we provide you with (in this manual) do not fit because of width or depth, the designs can be modified. Braces were added to the box to help prevent unwanted vibrations, the more an enclosure vibrates the less output you create.
Users who prefer a computer based design process will want to consider software programs like 500-923 BassBox 6 Pro for Microsoft Windows, or 500-945 Eminence Designer, which is also Windows-based and is produced by the Eminence Loudspeaker Manufacturing Company. In the following pages we will discuss how to properly select a suitable woofer, enclosure and filter as well as how to go about constructing an audiophile subwoofer that is both accurate and precise, but also has a high, linear sound pressure level throughout its frequency range. After everything is set, put the speaker wires from the terminal cup to the subwoofer.
These infrequent builders may not want to invest in a book library or software system, and we at Parts Express invite them to use our free design services. I haven’t gone into too much detail about how to physically build the things, but what I’ve covered are all things to bear in mind when it comes to building your own subwoofer. I originally decided to build a single 320 litre ported cylinder subwoofer, tuned to 14.5hz, with a 15 inch driver from Acoustic Elegance.
After measuring our available area, we determined what size box would fit behind the seat. You also need to find the displacement of your sub by calculating or looking it up. The volume of your sub will be subtracted from the internal volume of the box. If I just wanted the bass I’d buy a cheap- box and be done with it, but I’d like to have a final product that I’m proud of so I’ll likely end up doing a nice veneer job on the final product.
Note that the cost estimate is a little on the high side as some of the material (ie – 100 feet of wire, screws, glue, paint..) was previously left over from the HiVi Tower build. As an example of this, the spec sheet for the MTX Thunder 9500 15″ sub calls for a speaker box with an internal volume of 134.9 cubic inches. My method of choice for building subwoofer boxes is simply glue and lots of clamps. Sub-bass frequencies can be considered to be the foundation upon which to build an accurate and realistic home audio system. You can get good results with a box that’s anywhere inside the recommended range.
As I couldn’t easily get hold of another AV15X driver as there were production issues, I decided to sell the 15 inch driver and buy these. To get the minimum height and width for the front of your enclosure, measure the frame diameter of the subwoofer. This is a basic standard enclosure for a speaker is a box that is sealed and designed with acoustic suspension. I made a boom box backpack, I’ll post pics soon enough, sounds great so fa. This was my first soldering project BTW. This is to ensure that you can build an enclosure that the subwoofer can fit snugly into.