COMPONENTS
COME TOGETHER
PROJECT K2 S9800SE K2 S5800 S4800
In the right hands, a loud-
speaker can become so
much more than the mere
sum of its parts
Light yet rigid materials such as titanium,
beryllium and aluminum have been carefully
selected for the K2 compression drivers for
their speed and responsiveness.
The horns are cast in proprietary JBL
SonoGlass™
, an extremely dense and mechani-
cally inert substance that is easily molded into
the unusual shapes required for superior
acoustic performance.
The specially developed JBL bass drivers
employ a symmetrical double-damping structure
of Nomex®to cancel asymmetrical, nonlinear
motion, which reduces harmonic distortion.
A newly developed lightweight, low-loss,
EPDM foam-rubber surround ensures durabili-
ty. Cone curvature is computer-modeled for
maximum precision of movement.
The resonance-free K2 enclosures are crafted
of highly rigid, heavily braced MDF. The flared
reflex ports are optimized to eliminate reso-
nances. Two sets of large, gold-plated binding
posts allow for bi-wiring or bi-amplification.
JBL horns deliver uniform
sound pressure to the
listening area
JBL’s Charge-Coupled Linear Definition™sys-
tem applies DC bias to the capacitor, eliminat-
eliminate distortion at high power levels.
A Symmetrical Field Geometry™(SFG™) circuit
creates vertical symmetry and generates a
constant magnetic-flux density across the
width and length of the voice-coil gap.
The 75mm (3") beryllium (435Be) high-
frequency compression driver features an
Aquaplas-coated diaphragm and 25mm-throat
Bi-Radial®horn. The 25mm (1") beryllium
(045Be) super-tweeter compression driver is
mounted in a 12.8mm (0.5"), throat Bi-Radial
horn.
The K2 S9800SE crossover can be bypassed
for active bi-amplification via an external
crossover.
Horns are cast in JBL’s pro-
prietary SonoGlass™material
K2 S5800 and 4800
Both speakers are fitted with a 75mm (3")
aluminum-diaphragm compression driver
(435Al) and a 25mm (1") titanium-diaphragm
compression driver (045Ti). Both drivers
employ aluminum ribbon voice coils and
neodymium magnets for high output, high
sensitivity and high durability.
The K2 S5800 380mm (15") (1500FE) and
S4800 300mm (12") (1200FE) bass drivers are
designed for large excursion and power
linearity with ferrite magnets and JBL’s new
SFG magnetic circuit.
ing crossover distortion at zero electric
potential in the K2 S9800SE and K2 S5800.
By precisely matching the roll-off of each
transducer to ensure smooth, flat frequency
response in the crossover range, and by
achieving a swift transition between fre-
quency ranges, the K2 Series offers an
exceptionally wide vertical listening angle.
A high-frequency trim switch lets the user
fine-tune performance to suit personal pre-
ferences and room acoustics.
K2 S9800SE
Successor to the revered K2 S9800, the K2
S9800 Special Edition represents a signifi-
cant leap forward in sound and design.
Incorporating aluminum-metalized
polypropylene film capacitors for enhanced
clarity and detail, the K2 S9800SE is an ultra-
high-end statement of striking sculptural
elegance, available in luxurious wood-gloss
and black-gloss finishes.
The K2 S9800SE employs a 380mm (15")
(1500AL) woofer with ribbed Aquaplas-coat-
ed pulp cone, Alnico magnet and 100mm (4")
edge-wound voice coil. Aquaplas applied to
the rear periphery of the cone helps to
