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SUBWOOFER BOX TYPES:

Sealed Sub Enclosures
This seams to be one of the most popular subwoofer box used in SPL competition because it produces great low level power handling and require less space than most other speaker boxes need. The sealed box is the most forgiving to design errors. Now a couple of he cons of sealed boxes. You may notice more distortion at high frequency and the speaker magnet will not cool as easily as non sealed boxes. Now even though sealed boxes require the least amount of space if you have even less space than need for you sealed box for a give subwoofer you can use the Isobaric setup. This setup requires less air space in the sealed box but takes two subwoofers to get the output as if you had the one subwoofer in the correct sealed box. Isobaric is when you have a speaker mounted in a sealed box like normal but also mount another subwoofer to the first face to face.


Vented / Ported Boxes / Bass Reflex

If you are going to be making your own sub box, the bass reflex boxes are not nearly as forgiving as the sealed box and you will hear you design mistakes. The bass reflex or ported box is basically a sealed box with a port or vent tuned to a specific frequency. This setup has good power handling and excellent efficiency. Now the down side of the Ported box. The ported boxes can be much larger than sealed boxes. Playing a subwoofer below the tuned frequency and power handling will produce a very poor sound and will damage the subwoofer. Do not lower the port below the manufacturer’s recommended frequency, this will only make things a lot worse.

An enclosure with a port tuned to a specific frequency. There is no internal pressure working against the speaker, giving it worse transient response and speaker damping than a sealed enclosure. It is more efficient (more sound) than sealed enclosures because the back waves are channeled into the listening environment along with the front waves. The ports in these enclosures help produce deeper bass up to the tuned frequency. Below the tuned frequency power handling is bad and damage to the woofer is likely to occur. Also, prefabricated boxes are not built with ports tuned to each speaker manufacturer’s recommendations and may sound muddy or sloppy depending which speaker is used. The air exiting the ports sometimes produce a medium to loud noise called port noise (speaker farts).

Pros:
• more efficient than sealed enclosures (higher sound output)
• will generally have a better low frequency extension for a given response (up to tuned frequency)

Cons:
• larger than comparable sealed enclosure
• poor power handling below tuned frequency making it easier to damage subwoofer • reduced transient response
• ports on pre-fabricated boxes are not generally tuned to speaker manufacturer’s recommendations and sound can be muddy/sloppy
• possible port noise (speaker farts)

Bandpass Sub Enclosures
The most popular in SPL competition. A bandpass box is basically a port box with another enclosure mounted to the front of it with another port or vent. When built correctly will produce very high SPL. But here is the problem. Bandpass subwoofer box is not for giving at all. If the box is not built correctly it will a total waste of time and money and sound horrible. Bandpass boxes have to be tuned for a narrow bandwidth of frequency response. Suboofers are susceptible to cone over-excursion for frequencies outside of the tuned frequency response, and even worse if below. Please make sure to use a very good crossover to keep the frequency response in the correct range.

A bandpass enclosure is basically a combination of a sealed and vented enclosure. “A bandpass enclosure can sound good and give you a flat response but most of the generic bandpass enclosures are not designed for a flat response. They are designed to impress you in the stores. This means that they are built to produce a large peak at some frequency near 60hz. These enclosures will work well with something like rap music but generally won't sound good with other types of music. If you use a bandpass enclosure, it should be designed specifically for your speakers”

Pros:
• Great power handling
• Good low frequency response

Cons:
• Not as efficient as vented enclosures
• Ports are not tuned to speaker requirements
• Most speakers will sound better in ported or sealed enclosure

Polyester Fiber Fill - is used to slow down back waves from a speaker inside the box, making the subwoofer perform as though it were in a bigger enclosure than it is really mounted in. It is recommended to use approximately 1 pound of fill per cubic foot of box volume. In enclosures were it is possible for fill to blow out of port a light multipurpose adhesive should be used to secure the fill to the wall linings.

Subwoofer Box Volume Calculator:
Visit our subwoofer box volume calculator for more information about getting the right sub box for your car.
 
CAR ELECTRONICS NEWS:

FBT introduces new compact line array - PSNEurope

FBT introduces new compact line array
PSNEurope
A storage compartment is provided within the subwoofer enclosure to securely house both the satellite speaker and its supplied mounting pole for storage and transport, while a dedicated locking system holds all of the equipment in place. The mounting ...

Building A DIY Sealed Subwoofer - Audioholics (press release) (registration) (blog)

Audioholics (press release) (registration) (blog)

Building A DIY Sealed Subwoofer
Audioholics (press release) (registration) (blog)
Here we'll look at how to design and build a DIY sealed subwoofer. Sealed subwoofers have a few important advantages for the DIYer. First and foremost, they're relatively easy to build compared to a vented box or a more exotic alignment like a tapped ...

K.I.S.S. AV Launches Sonic Vortex-Powered Soundbar Killer on Kickstarter - Home Theater Review

K.I.S.S. AV Launches Sonic Vortex-Powered Soundbar Killer on Kickstarter
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As part of the Kickstarter campaign, K.I.S.S. AV is offering two different systems--one is a stereo system comprised of the company's X4 speakers, and the other is a 2.1 system including the O6 subwoofer--at savings up to $200 and $400, respectively ...

EAW Debuts RADIUS Loudspeaker Family - Audio Visual News Network

Audio Visual News Network

EAW Debuts RADIUS Loudspeaker Family
Audio Visual News Network
The complete range consists of 8-inch and 12-inch two-way point-source loudspeakers that are available in two horn patterns: a double 8-inch articulated line array, single 12-inch, and 18-inch subwoofer models, and will soon add a 12-inch coaxial stage ...

Immersive Audio System Featuring Patented Audio Technology Launches on Kickstarter for Under $300 - PR Newswire (press release)

PR Newswire (press release)

Immersive Audio System Featuring Patented Audio Technology Launches on Kickstarter for Under $300
PR Newswire (press release)
However, the immersive and visceral impact offered by dedicated left and right speakers plus a subwoofer, remains unmatched. The K.I.S.S. AV X4 speaker system breathes new life into the audio ... Vortex. The cabinet design boasts a sound super highway ...

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Review: Razer Blade Stealth ultrabook - ExtremeTech

ExtremeTech

Review: Razer Blade Stealth ultrabook
ExtremeTech
The Razer Blade Stealth mounts its speakers on the actual keyboard area instead of on the bottom of the system and the sound quality from them is surprisingly good for a design of this type, provided you don't expect amazing subwoofer-quality bass. PC ...

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Car subwoofers–Let your journey is full of passion - TheSequitur.com

Car subwoofers–Let your journey is full of passion
TheSequitur.com
Installation is another issue: most electronic stores and body shops offer cheap car subwoofer installation, but they are also easily self-installed. Also, be sure to carefully consider what kind of enclosure you need for your subwoofer, as different ...

Hot Methods To Purchase The Ideal Subwoofer - TheSequitur.com

Hot Methods To Purchase The Ideal Subwoofer
TheSequitur.com
Choosing the proper sub is usually impossible so it is significant to give importance to the various variables before picking a single. Tubes or Box Enclosures.Tube forms are not difficult to move are lower in expense that is why they are renowned ...

Saturday at THE Show Newport - Stereophile Magazine

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At $20,000 per pair, and with only 10 pairs scheduled to be built, the ESS Lab Transar employs a horn-loaded midrange/tweeter array of Heil drivers covering the range from 150Hz to 800Hz. At the bottom end, an on-board subwoofer takes over. The top ...

Community expands I Series options with new compact models - Installation International

InAVate

Community expands I Series options with new compact models
Installation International
Community has launched three I Series compact loudspeakers designed to match the performance, appearance and voicing of the larger I Series Point Source and Subwoofer models. The IC6-1062, IC6-1082 and IC6-2082 compact models complement the ...
New Compact I Series speakers from CommunityAudio Media International

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