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For more than 60 years, JBL has been delivering
products embodying the technology developed 
in the professional arena – equipping leading
recording studios and movie theaters, as well as
live-music reinforcement in venues ranging from
dance clubs to Woodstock. We continue to
transform this expertise into products that
provide the impact and excitement of a live
performance. The JBL

®

experience is for

enthusiasts who won’t settle for anything 
less than “live” at home or on the go.

Just as every performance automobile
manufacturer has a racing division to test
cutting-edge technology and engineering
capabilities, the GTi Series pushes the limits 
of JBL engineering and technology. The three
Differential Drive

®

* Design GTi subwoofers are

the result of extensive engineering with the goal
of delivering the best subs money can buy. If 
you are looking for the absolutely best in low-
frequency reproduction, then look no further.

DIFFERENTIAL DRIVE

®

DESIGN

The JBL Differential Drive Design is an
important advancement in subwoofer motor
technology. This design enables each GTi
subwoofer to use a pair of smaller 3"-diameter
voice coils. This dual-coil configuration provides
significantly higher power handling through
increased surface area, and maintains the 
low-moving mass not possible with larger coils. 

KEVLAR

®

-IMPREGNATED-

PAPER WOOFER CONES

Using this combination has been chosen for its
high strength-to-weight ratio, and is formed
using a proprietary manufacturing process. Its
stiffness relieves stress concentrations that may
accumulate at the base of the cone in high-
power and high-pressure applications. 

NITRILE-BUTYLENE-
RUBBER, ONE-PIECE
SURROUND AND
GASKET

Using this material results in an optimal blend 
of elasticity and internal damping. The size of 
the roll is optimized to offer good long-throw
linearity with the proper amount of control 
and stability at excursion limits. 

PROGRESSIVE SPIDER

This allows better control at excursion limits 
than a linear spider. The benefit is reduced
distortion at high output levels. 

VENTED POLEPIECES

Additional cooling is provided to the motor
structure. The subwoofer’s thermal capabilities 
are augmented, increasing power handling. 

*U.S. patent

no. 5,748,760

and other

patents

pending

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