Choosing an Enclosure JBL GT Series
Thank you for purchasing a GT Series subwoofers are optimizedmany prefabricated sealed your design is correct if you wish
new JBL GT Series subwoofer.to perform best in small, sealed,enclosures available. An optimumto build it yourself. An optimum
Subwoofer installation requiresvented and prefabricated bandpasssealed enclosure is always smallervented enclosure is always larger
woodworking skills and some enclosures. While inŢnite-baf�ethan other types of enclosures than the optimum sealed box for
experience disassembling andmounting of GT Series subs is optimized for a particular speaker,the same woofer and will require
reassembling automotive interiors.possible, power handling will beso they require the smallest amountmore space inside the vehicle.
If you lack the tools or necessarygreatly compromised becauseof space inside the vehicle.
skills, have your subwoofer installedthereOs no enclosed volume of air Bandpass enclosures often
by an authorized JBL dealer. to prevent the speakerOs cone fromVented enclosures provide better provide the most output available
moving past its limit. For this reason,efŢciency in the 40Hz�50Hz rangefrom any ampliŢer and subwoofer
Warning: Playing loud music in we do not recommend inŢnite-baf�ebut this efŢciency comes at thecombination at the expense of
an automobile can permanentlymounting for GT Series subwoofers.expense of sound in the lowestsonic accuracy. If sheer SPL
damage your hearing as well asoctave (below 40Hz) and at the(sound-pressure level) is what you
hinder your ability to hear trafŢc.You should choose the enclosureexpense of some control and powerdesire most, choose a bandpass
We recommend listening at low you will use based on the type ofhandling. If you are using a smallenclosure. Bandpass-enclosure
levels while driving. JBL accepts nomusic you listen to, how muchampliŢer, a vented box will providedesign is very tricky and the aid
liability for hearing loss, bodily injuryampliŢer power you will use for themore bass output from less power.of a computer and enclosure
or property damage resulting fromsubwoofer and how much spaceVented enclosures are also welldesign software is necessary. If
use or misuse of this product.inside the vehicle you can devote suited to a variety of music types.you are an experienced installer
to a subwoofer enclosure.Because vented enclosures requireor have some woodworking
the volume of the enclosure andexperience, you may wish to build
Because a sealed enclosure the size of the port to have a the enclosure described in the
provides the most control over thespeciŢc relationship with the enclosure design sheet included
wooferOs movement, a woofercharacteristics of the woofer, the with this woofer. Fortunately, there
mounted in a sealed enclosure willenclosure must be built exactly toare many prefabricated bandpass
handle more power than a wooferthe speciŢcations provided. Whileboxes available and they are all
mounted in another enclosure type.there are some prefabricated optimized to extract the most
Sealed enclosures provide morevented boxes available, matching aoutput possible from any woofer.
accurate sonic reproduction thanprefabricated box to a particularBandpass enclosures can be quite
other enclosure types, so they arewoofer is difŢcult. If you wish to uselarge and may require a lot of space
well suited to all types of music.a vented enclosure, we stronglyinside your vehicle.
Sealed-enclosure construction recommend having your authorized
is straightforward and there areJBL dealer build it or verify that
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