Unique in both concept offers uncolored,
to that of many two-way free response
listening
in-line arrays, monitoring
level greater than 85 dB not only at 500 Hz
but at 50 or 5,000 Hz as well
superior
Model 2115H is unquestionably
the 2115H is ceiling
speaker
facilities, and music
substantially
uniform
only 42 L (1.5 ft3) internal volume, asingle
deliver exceptional
efficiency
more than eight octaves. Installed in an enclosure
offered for professional
ingly crafted to traditional
Unlike other 200 mm (8 in) loudspeakers,
the JBL 2115H maintains through
from distortion,
for top quality distributed-speaker
rooms.
a sound pressure
JBL Model 2115H performance
monitor systems. Because of its peak-
and freedom
recommended installations,
and execution,
natural, wide-range
care or attentionThe of
2115H can produce
impedance
the finest 200 mm loudapplications.
JBL standards
performance
It is painstak-
of precision
and will
year after year without special
2115J offers identical
is 16 0 rather than 8 n.
performance;
its
Model 2115H/J-200 Architectural
mm (8 in) Full Range Loudspeaker
Specifications
The loudspeaker
shall have a nominal
(8 in), overall depth not greaterthan
diameter
of 200 mm
100 mm (4 in), and weigh
at least 3.6 kg (8 Ib).The frame shall be of cast aluminum to resist deformation
and the magnetic
a ferrite magnet and a symmetrical the voice coil gap. An aluminum
magnetic
imately 50 mm (2 in) in diameter aluminum
shall utilize
field around
ring on the pole piece shall
act to reduce flux modulation.The edgewound
assembly
voice coil shall be approxand shall be made of
ribbon operating
in a magnetic
not less than 0.85 T (8,500 gauss). High frequencies be reproduced
by a damped
aluminum
field of shall
dome attached
directly to the voice coil former. Performance
specifications
of a typical production
unit shall
be as follows: Measured warbled
sensitivity 500-2500
(SPL at 9.1 m [30 ft] with one mW input, Hz) shall be no less than 42 nor greater
than 45 dB on axis, and down no more than 2 dB 45’ off axis. As an indication
of electromechanical
conversion
ciency, the BI factor shall be at least 6.8 pm. quency
response
Usable fre-
shall extend from 40 to at least 15,000
Hz. On-axis response,
measured
or more under free-field
at a distance
conditions,
1,500and
of 1.8 m (6 ft)
shall be within A3 dB
from 40 to 12,000 Hz, with the exception between
effi-
of the region
6,000 Hz. In this region, responseshall
ex-
hibit a gentle 4-5 dB rise to heighten the feeling of “presence:’ Above 6,000 Hz response
shall gradually
roll off, but at 15
kHz shall not be more than 6 dB down from the 500-2500 reference
level. Nominal
impedance
power capacity
shall be at least 50 watts normal
music program
material.
The loudspeaker speakers submitted
shall be JBL Model 2115H/J.
will be considered
for equivalency
data from a recognized
verify that the above performance
: Em
Professional
Hz
shall be 8 or 16 ohms and speech or
Other loud-
provided
independenttest specifications
that
laboratory are met.
Division
James B. Lansing Sound, Inc., 8500 Balboa Boulevard, Northridge, California 91329 U.S.A.