Read JBL K2S4800 (serv.man2) User Guide / Operation Manual online
OWNER’S GUIDE
3
PREFACE
4
CHAPTER 1 – THE S4800 LOUDSPEAKER:
A TRIUMPH IN ACOUSTICS AND TECHNOLOGY
8
CHAPTER 2 – UNPACKING THE S4800 SYSTEM
8
CHAPTER 3 – SELECTING CABLE
9
CHAPTER 4 – AMPLIFIER RECOMMENDATIONS
10
CHAPTER 5 – PLACEMENT AND SETUP CONSIDERATIONS
11
CHAPTER 6 – S4800 SWITCH OPERATIONS
11
CONTROLS AND CONNECTIONS
15
CHAPTER 7 – CARE AND MAINTENANCE
16
CHAPTER 8 – TROUBLESHOOTING AND SERVICE GUIDE
17
S4800 SPECIFICATIONS
TABLE OF CONTENTS
2
PREFACE
Thank you for selecting a JBL
®
S4800 loudspeaker system. It
represents the sum total of our
research and developmental efforts
in sound reproduction over the last
half-century. We have labored to
create a loudspeaker system with
no acoustical or electrical
limitations whatsoever. While the
S4800 loudspeaker is itself a new
development, the goal behind it
goes right back to the earliest days
of the original James B. Lansing
Sound Company.
represents the sum total of our
research and developmental efforts
in sound reproduction over the last
half-century. We have labored to
create a loudspeaker system with
no acoustical or electrical
limitations whatsoever. While the
S4800 loudspeaker is itself a new
development, the goal behind it
goes right back to the earliest days
of the original James B. Lansing
Sound Company.
But it is your listening pleasure that
ultimately determines how
successful we are in this endeavor.
It is solely in the interest of
ensuring a perfect listening
experience that we ask you to
faithfully follow the setup and
operation procedures outlined in
this owner’s guide.
ultimately determines how
successful we are in this endeavor.
It is solely in the interest of
ensuring a perfect listening
experience that we ask you to
faithfully follow the setup and
operation procedures outlined in
this owner’s guide.
This guide exists for several
purposes. As your owner’s manual,
it contains all necessary
background information and
detailed instructions for setting up
your S4800 loudspeaker system,
including unpacking the
loudspeaker; selecting the correct
location, speaker wire, wiring
scheme and amplification; and
connecting it to its associated
electronics. This information will be
found in Chapters 2 through 6. In
addition, we have included a
detailed description of the S4800
speaker (Chapter 1) so that you
may become thoroughly
acquainted with its unique design
and technological features.
purposes. As your owner’s manual,
it contains all necessary
background information and
detailed instructions for setting up
your S4800 loudspeaker system,
including unpacking the
loudspeaker; selecting the correct
location, speaker wire, wiring
scheme and amplification; and
connecting it to its associated
electronics. This information will be
found in Chapters 2 through 6. In
addition, we have included a
detailed description of the S4800
speaker (Chapter 1) so that you
may become thoroughly
acquainted with its unique design
and technological features.
Although physically and materially
imposing, the setup procedure of
the S4800 loudspeaker system is
relatively simple. We strongly urge
you to read this manual thoroughly
before you begin, and consult it
frequently throughout the process.
Considerations must be made in
placing the speakers; their stature
and weight make it imperative that
you become familiar with the entire
setup process in advance.
imposing, the setup procedure of
the S4800 loudspeaker system is
relatively simple. We strongly urge
you to read this manual thoroughly
before you begin, and consult it
frequently throughout the process.
Considerations must be made in
placing the speakers; their stature
and weight make it imperative that
you become familiar with the entire
setup process in advance.
Please take a moment to register
your product online at
www.jbl.com. Registration enables
us to keep you posted on our latest
advancements, and helps us to
better understand our customers
and build products that meet their
needs and expectations.
your product online at
www.jbl.com. Registration enables
us to keep you posted on our latest
advancements, and helps us to
better understand our customers
and build products that meet their
needs and expectations.
3
The new S4800 employs a 3-way,
three-driver design, incorporating
an ultrahigh-frequency (UHF)
compression driver and horn to
reproduce high frequencies up to
40kHz. With the UHF handling the
ultrahigh frequencies, the high-
frequency (HF) transducer could
then be upgraded to a new design
using a 3-inch diaphragm for better
reproduction of lower frequencies
and better blend with the woofer
than the older generations’ 2-inch
diaphragm. Both compression
drivers are mounted in a unique
three-driver design, incorporating
an ultrahigh-frequency (UHF)
compression driver and horn to
reproduce high frequencies up to
40kHz. With the UHF handling the
ultrahigh frequencies, the high-
frequency (HF) transducer could
then be upgraded to a new design
using a 3-inch diaphragm for better
reproduction of lower frequencies
and better blend with the woofer
than the older generations’ 2-inch
diaphragm. Both compression
drivers are mounted in a unique
combination Bi-Radial
®
horn
structure, precision-molded from
JBL’s proprietary SonoGlass™
material, an extremely dense and
mechanically inert substance that
is easily molded into the unusual
shapes required for superior
acoustic performance.
JBL’s proprietary SonoGlass™
material, an extremely dense and
mechanically inert substance that
is easily molded into the unusual
shapes required for superior
acoustic performance.
In order to re-create the extremely
high dynamic range provided by
today’s audio sources, a new low-
frequency transducer was used,
incorporating a ferrite magnet,
3-inch edge-wound voice coil, and
an Aquaplas-coated 15-inch cone
made of Kevlar
high dynamic range provided by
today’s audio sources, a new low-
frequency transducer was used,
incorporating a ferrite magnet,
3-inch edge-wound voice coil, and
an Aquaplas-coated 15-inch cone
made of Kevlar
®
composite, a
mixture of Kevlar fiber and pulp
material that provides increased
rigidity. An EPDM rubber surround
was chosen for both its flexibility
and long life. The Symmetrical Field
Geometry
material that provides increased
rigidity. An EPDM rubber surround
was chosen for both its flexibility
and long life. The Symmetrical Field
Geometry
™
(SFG
™
) magnetic
structure minimizes second
harmonic distortion by providing a
uniform flux field that prevents
uneven cone movement. The rigid
cast-aluminum frame is also
designed to minimize distortion, as
aluminum has no effect on the
magnetic field. Extensive computer-
aided engineering and design effort
made to develop the optimized port
tuning employed in the S4800 has
resulted in a significant advance in
the concept of state-of-the-art bass
reproduction. This proprietary
alignment method offers the best
damping characteristics and
provides extremely fast alignment,
eliminating the typical “bass-
reflex” sound of a ported system.
harmonic distortion by providing a
uniform flux field that prevents
uneven cone movement. The rigid
cast-aluminum frame is also
designed to minimize distortion, as
aluminum has no effect on the
magnetic field. Extensive computer-
aided engineering and design effort
made to develop the optimized port
tuning employed in the S4800 has
resulted in a significant advance in
the concept of state-of-the-art bass
reproduction. This proprietary
alignment method offers the best
damping characteristics and
provides extremely fast alignment,
eliminating the typical “bass-
reflex” sound of a ported system.
All three transducers are built using
the most advanced materials and
precision manufacturing
techniques refined from renowned
JBL professional sound systems.
the most advanced materials and
precision manufacturing
techniques refined from renowned
JBL professional sound systems.
High power-handling capability
results in no limitations on the types
of source material. The S4800 has
very high input sensitivity; even a
relatively small high-end amplifier
can provide full dynamic range
without compression.
results in no limitations on the types
of source material. The S4800 has
very high input sensitivity; even a
relatively small high-end amplifier
can provide full dynamic range
without compression.
Despite its power and
sophistication, the S4800 embodies
both tradition and technology. It
reflects the design, engineering
and manufacturing expertise
derived and refined through nearly
six decades of experience that are
the exclusive province of one
loudspeaker builder – JBL.
sophistication, the S4800 embodies
both tradition and technology. It
reflects the design, engineering
and manufacturing expertise
derived and refined through nearly
six decades of experience that are
the exclusive province of one
loudspeaker builder – JBL.
4
Figure 1.
Cutaway view of S4800 speaker system.
Cutaway view of S4800 speaker system.
CHAPTER 1 – THE S4800 LOUDSPEAKER: A TRIUMPH IN
ACOUSTICS AND TECHNOLOGY
ACOUSTICS AND TECHNOLOGY
