Overview: The JBL GT5-1202BR is a
single 12" preloaded enclosure with a Slipstream Port.
The GT5-1202BR loaded enclosure features 3/4" medium-density-fiberboard
(MDF) construction, high-quality binding-post terminals and a single 12" GT5
woofer. The GT5-1202BR features a wide-bandwidth design, which provides more
output between 20Hz and 40Hz.
12" Subwoofer: The JBL GT5-1202BR features a single loaded GT5
12-inch, 2-ohm woofer. The JBL Grand Touring Series woofer features a
polypropylene woofer cone with a heavy-duty molded dustcap. The woofer also
features a rubber surround to provide exceptional cone-edge suspension and
long-throw linearity with control and stability at the excursion limits. The GT5
woofer features a progressive spider, which offers better control at the
excursion limits. This progressive spider reduces distortion at high output
levels. The GT5 woofer also feature a vented pole-piece which provides
additional cooling to the woofer's motor structure, resulting in an increase in
the subwoofer's thermal power-handling capability. The vented pole-piece and
motor structure provide additional cooling. In combination with the
rubber-coated tinsel leads, this results in much better long-term reliability.
In addition, the GT woofer utilizes dual-stacked oversized magnets which allows
increased magnetic flux, resulting in higher efficiency and better woofer
control. The JBL GT woofer features a die-cast aluminum basket for added
Hatchback Enclosure: The JBL GT5-1202BR's enclosure is made from 3/4"
medium-density fiberboard (MDF) and is covered with black carpet. It has been
perfectly tuned for the in-car environment so it is optimized for tight,
powerful, and precise bass response. The GT5-1202BR is rated at 2-ohms at the
enclosure's speaker terminals. The GT5-1202BR's is a hatchback style enclosure
designed to fit in the trunk or cargo area of many hatchbacks, coupes, sedans,
SUVs and vans.
Slipstream Port: The JBL GT5-1202BR provides superior performance
thanks to its revolutionary Slipstream port located on the front of the
enclosure. The double-flared shape of the oversized port is precisely
calculated, efficiently eliminating port noise. Even at high SPL, airflow
through the port will remain uniform, offering better low-frequency extension
and woofer protection. This gradual change from high pressure to low pressure
eliminates the audible distortion called "whacking." Because the area of the
port in the middle is much smaller than the mouth of the port, the port can be
much shorter than a cylindrical port with a surface area the same as the
Slipstream port's mouth; this means it can fit into regular boxes. Stickiness
outside the box is maximized by increasing pressure, and stickiness inside the
port is minimized by reducing velocity. The benefit of this proprietary
technology is more bass output with greatly reduced port noise and distortion.
Binding Post: The JBL GT5-1202BR features a pair of gold-plated
binding posts which will accept dual-banana plugs on the right-hand side of the
box (when facing front of box). The GT5-1202BR is rated at 2-ohms at the enclosure's speaker terminals.
Metal-Bar Grille: The JBL GT5-1202BR features an Aluminum die-cast,
metal-bar grille (two metal bars) which looks great and offers a high level of
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