Read JBL K2S5800 (serv.man2) User Guide / Operation Manual online
CHAPTER 2 – THE PROJECT K2 S5800 LOUDSPEAKER:
A TRIUMPH IN ACOUSTICS AND TECHNOLOGY
A TRIUMPH IN ACOUSTICS AND TECHNOLOGY
The following sections describe
the primary features and compo-
nents of the Project K2 S5800
loudspeaker system.
the primary features and compo-
nents of the Project K2 S5800
loudspeaker system.
The enclosure of the K2 S5800
is specially designed to transfer
unwanted mechanical energy
away from any acoustically active
surfaces, virtually eliminating
coloration.
is specially designed to transfer
unwanted mechanical energy
away from any acoustically active
surfaces, virtually eliminating
coloration.
The massive enclosure, along
with its specially designed brass
modular feet, couples directly to
the floor, and the system literally
becomes a structural part of its
environment. Any vibration is
transmitted harmlessly down the
channel provided by the ring/
disc axes and into the floor. The
SonoGlass combination horn
maintains a smooth energy
transmission path.
with its specially designed brass
modular feet, couples directly to
the floor, and the system literally
becomes a structural part of its
environment. Any vibration is
transmitted harmlessly down the
channel provided by the ring/
disc axes and into the floor. The
SonoGlass combination horn
maintains a smooth energy
transmission path.
The Project K2 S5800 transducer/
enclosure arrangement represents
the best possible balance of the
various tuning options and avoids
the mid-bass response buildup
found in other vented systems.
Response works with, rather
than against, the effects of
“room loading.”
enclosure arrangement represents
the best possible balance of the
various tuning options and avoids
the mid-bass response buildup
found in other vented systems.
Response works with, rather
than against, the effects of
“room loading.”
The unique design of the Project K2
system is the platform for its equally
unique acoustical attributes.
system is the platform for its equally
unique acoustical attributes.
Thanks to the centrally mounted
combination horn, both the UHF
(ultrahigh-frequency) and HF (high-
frequency) drivers are located at
the ear level of the listener.
combination horn, both the UHF
(ultrahigh-frequency) and HF (high-
frequency) drivers are located at
the ear level of the listener.
See Figure 2.
The large 3-inch HF transducer
allows the two 12-inch woofers to
be crossed over at a frequency low
enough to eliminate any audible
effects of their exact location and
proximity.
allows the two 12-inch woofers to
be crossed over at a frequency low
enough to eliminate any audible
effects of their exact location and
proximity.
Full image coherency is main-
tained, resulting in an acoustically
tained, resulting in an acoustically
stable pinpointed stereo image. All
the sound seems to come from the
combination horn in the center.
Music imaging is more realistic
since the sound appears to emanate
from one point and not from multiple
points at different times.
the sound seems to come from the
combination horn in the center.
Music imaging is more realistic
since the sound appears to emanate
from one point and not from multiple
points at different times.
Project K2 is a constant-angle sys-
tem without regard to frequency.
Careful horn design enables the
loudspeaker to strictly adhere to a
60° horizontal/30° vertical coverage
pattern. This Controlled Coverage
arrangement precisely defines the
optimum listening area and mini-
mizes room effects. At the same
time, it provides a generous “sweet
spot” for more comfortable critical
listening sessions.
tem without regard to frequency.
Careful horn design enables the
loudspeaker to strictly adhere to a
60° horizontal/30° vertical coverage
pattern. This Controlled Coverage
arrangement precisely defines the
optimum listening area and mini-
mizes room effects. At the same
time, it provides a generous “sweet
spot” for more comfortable critical
listening sessions.
THE DUAL 1200FE LOW-
FREQUENCY DRIVERS
FREQUENCY DRIVERS
See Figure 3.
In order to achieve the lowest pos-
sible distortion and compression
along with the high linear excur-
sion necessary, the 1200FE is
equipped with a ferrite magnet.
As with earlier Project K2 low-
sible distortion and compression
along with the high linear excur-
sion necessary, the 1200FE is
equipped with a ferrite magnet.
As with earlier Project K2 low-
Figure 2. Height of K2 S5800 speaker system in relation to listener.
Terminal Base
Glass-Filled ABS
Glass-Filled ABS
Terminals
Gold-Plated 5-Way
Binding Posts
Gold-Plated 5-Way
Binding Posts
Magnet
Ceramic
Ceramic
Back Plate
Steel SAE-1008
Steel SAE-1008
Pole Sleeve
Hi-Purity Copper
Hi-Purity Copper
Voice Coil
Aluminum Ribbon Wire
ES-1350 on High Temp
Fiberglass Former
Aluminum Ribbon Wire
ES-1350 on High Temp
Fiberglass Former
Cone Body
Special Paper
Pulp Composite
Special Paper
Pulp Composite
Frame
Cast 380
Aluminum
Trim Ring
NBR Rubber
Spider Spacer
Extruded Aluminum
6063
Dust Dome
Paper Pulp
Paper Pulp
Composite
Spiders
Nomex
®
Pigtail Leads
Silver-Plated
Silver-Plated
Cadmium Copper
w/Conex Core
Polepiece
Steel SAE-1008
Steel SAE-1008
Surround
EPDM Foam Rubber
Figure 3. Cutaway view of 1200FE low-frequency transducer.
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