JBL E-Series Loudspeaker
Musical Instrument Loudspeaker
Instruction Manual
Eild, E120, E130, E1d4d, El45, E151
The E Series
For more than 30 years professional
musicians have demonstrated an
increasing preference for [BL musical
instrument loudspeakers. The current
E Series are the best sounding musical
instrument loudspeakers JBL has ever
made, and are designed and built to
provide unmatched reliability. Under
JBL's severe test conditions, size for
size, no other musical instrument
loudspeaker can match their
ruggedness. In addition to superb
sound, E Series loudspeakers are
extremely efficient, delivering an
unusually high acoustic output per
watt of input.
There are six great musical
instrument loudspeakers in the E
Series. This manual explains how to
achieve optimum performance from
each of them.
E110 250 mm (10 in)
The E110 delivers more sound per amplifier watt than any
other loudspeaker in its size class. Sustain is highly
predictable and overtone characteristics are brilliant. The
speaker is right at home with lead or rhythm guitar,
keyboards, or stacked in a column for PA use.
E130 380 mm (15 in)
The E130 is |BL's most rugged and efficient extended range
musical instrument loudspeaker. The large cone area
provides considerably more output than smaller cones
without sacrificing midrange or high frequency repro-
duction. An ideal choice when loudspeaker size is not
restricted and maximum sound levels are desired.
a "a
E145 380 mm (15 in)
The E145 has the most natural, uncolored sound that JBL
has ever created in a bass instrument loudspeaker. [ks low
distortion characteristics and pure tonal quality make it
the ideal choice for keyboards, organs, bass guitars, or
P. A. systems, The E145 delivers pure bass notes at thun-
derous levels with high efficiency and power capacity.
E120 300 mm (12 in)
The E120 is the latest version of JBL's most popular —
musical instrument loudspeaker. Its efficiency and power
capacity are greater than many extended range 380 mm
(15 in) speakers. For use in guitar amplifiers, organs,
electric pianos, or other applications.
E140 380 mm (15 in)
The E140 is specially designed for the bass guitarist or
keyboard player who wants a bright, sharply defined
sound. It is capable of producing extremely high sound
pressure levels with efficiency that's unmatched by any
other bass speaker except our own E145.
E151 460 mm (18 in)
JBL's loudspeaker. The E151 is made specific-
ally for electric bass and is designed to sound great in
horn loaded or reflex enclosures. Its sound audibly sur-
passes the punch found in other bass speakers in its size
class. The E151 is recommended whenever a maximum
amount of clean bass is required at high volume levels.
Mounting the Loudspeaker—
General Instructions
Replacing an existing musical
instrument loudspeaker with a JBL
usually requires only basic hand tools.
In most instances, it's simply à matter
of removing the original unit and
mounting the JBL in its place.
On rare occasions, however,
internal bracing or paneling of some
enclosures may have to be modified
or relocated to provide clearance for a
JBL loudspeakers large magnetic
structure or frame,
A few “original equipment”
loudspeakers are mounted with wood
screws, For the most satisfactory
installation, we strongly suggest
using the T-nuts and machine screws
supplied beneath the packing
material in the shipping carton. This
mounting hardware allows JBL
loudspeakers to be removed and
reinstalled hundreds of times without
damaging an enclosure. Instructions
for installing the hardware are given
in the following sections.
Front Mounting
After making a baffle cutout of
appropriate size for the JBL
loudspeaker, lay the enclosure on its
back and place the loudspeaker in the
baffle cutout. Using the loudspeaker
frame as a template, insert a drill in
each of the mounting holes and
gently tap the drill two or three times
with a small hammer. The resulting
indentations on the front baffle are
where the mounting holes should be
drilled. (See chart.)
Front Mounting
it dh di oY A
Next, remove the loudspeaker, and
drill a hole through each indentation.
Insert T-nuts from behind the front
baffle, tapping them with a hammer
until they are flush.
Place the loudspeaker in position
after attaching input wires, and
the mounting screws, ti )
them evenly and firmly. ( To avoid
frame warpage, do not tighten to
excess, |
Rear Mounting
After making a baffle cutout of
appropriate size for the JBL
loudspeaker, drill the mounting holes
in the manner described previously
for front mounting.
Place the loudspeaker in position
after attaching input wires, and install
the mounting screws, tightening
them evenly and firmly. [ To avoid
frame warpage, do not tighten to
excess, |
Mounting Dimensions
Rear Mounting
L i т ei L are
Loudspeaker Mounting
Kit Instructions
The MATS Loudspeaker Mounting
Kit simplifies front panel mounting
of JBL 380 mm (15 in) loudspeakers
and permits a degree of latitude in
the diameter of the mounting cutout
required on the enclosure baffle
panel. This feature is often helpful
when utilizing an enclosure in
which the cutout has already been
made. The kit consists of a sealing
gasket, four cast clamps and four
mounting screws with T-nuts, The
clamps and mounting hardware can
also be used for JBL 300 mm (12 in)
and 460 mm (18 in) loudspeakers,
but it will be nece to make a
sealing gasket specifically for such
applications. Two MA15 kits should
be used to mount the El51 460 mm
(18 in) loudspeaker, due to the
weight of this massive unit. The
Baffle Cutout Diameter Bolt Circle Frame Mounting Screw T-Nut
Loudspeaker Front Mount Rear Mount Diameter Drill Size ll Size
228 mm 222 mm 245 mm 5.4 mm 6 mm
8 9 inches 84 inches 954 inches 742 inch #1
ets 280 mm 280 mm 294 mm | 6.6 mm ó mm
Ms inches — 1148 inches 1%s inches Нам inch #1
Elo 355 mm HI MM 370 mm 7 mm é mm
E145 13419 inches 1344 inches 14#s inches _ Lis inch #1
E181 427 mm 422 mm 441 mm 6.6 mm об ттт
16s inches 16% inches 1734 inches Táa inches #1
1. When the MALS mounting kit is used, baffle cutouts may be larger; as large as 286 mm (11% inches) for the E120; 335 mm (1414
inches) for the E130 and E140; and 433 mm [17s inches) for the E151. Be certain that the loudspeaker is centered over the
baffle cutout and that the sealing gasket on the baffle surface prevents air leaks around the frame or through the frame
mounting screw holes.
MA15, however, cannot be used to
mount E145 380 mm (15 in)
ker, because the clamps
will not fit the unit's frame.
To install, peel the protective
backing from each gasket segment
and apply the segments around the
cutout (not shown). Drill four 8 mm
(5/16) holes for the mounting
screws; using a small hammer, tap
each T-nut flush into the back of the
With the enclosure on its back on a
clean, padded surface, place the
loudspeaker in position. Thread the
Phillips-head mounting screws
partially into their respective T-nuts
and slip a cast clamp under each
screw head so that the camp's
gripping edge is on the loudspeaker
frame. Tighten the screws evenly, but
avoid excessive force.
Power Capacity
Musical instrument loudspeakers
receive their signal directly from a
performer's instrument, with its wide
dynamic range and explosive
transients. Amplifier power and
volume level are often very high—
especially during live performances.
Because these conditions are so
severe, we prefer the continuous sine
wave method of rating the power
capacity of JBL musical instrument
loudspeakers, This laboratory
standard test is far more demanding
than actual performance situations,
and provides a credible measure of a
loudspeaker's power handling
Since a number of manufacturers
continue to use the less stringent
“continuous program power” rating,
we have included these figures for
your reference, The continuous
program power rating is acceptable
for loudspeakers used at home,
because the dynamic range of music
they reproduce has been greatly
compressed in the recording, process,
and playback levels are relatively
moderate. As a result, demands
placed on home entertainment
loudspeakers are far less critical than
those used with amplified musical
The most common cause of damage
to a loudspeaker in high power
applications is overheating. A cone
loudspeaker draws maximum power
from an amplifier, and thus can be
most easily overheated, when
operating through the portion of the
audio spectrum in which its minimum
impedance —above system resonance
—occurs, (Actually, impedance of all
loudspeakers varies from low to high
frequencies.) For this reason, we
require E Series loudspeakers to
withstand their full rated power at all
frequencies within one-half octave
above and below minimum
impedance—and sustain such
performance continuously for one
hour without damage.
While other methods can be used to
achieve even greater continuous sine
wave power rating figures, such as
testing for shorter lengths of time or
testing at other than the loudspeaker's
minimum impedance region, our tests
and power ratings provide
specifications that are very realistic—
by commonly used standards,
Amplifier Power
When driven by a high intensity input
more than its rated power, sending an
extremely distorted signal to the
loudspeaker. Since a loudspeaker will
reproduce distortion as accurately as a
“dean” signal, under certain
conditions a severely distorted 75
walt signal may damage a
loudspeaker more easily than an
undistorted 150 watt signal. If load
volume levels are anticipated, an
amplifier that has plenty of reserve
power is preferable to a low powered
unit which will distort more readily.
Whenever exceptionally high levels
of acoustic output are required, more
amplifier power and more
loudspeakers are generally needed to
obtain a significant increase in
loudness. For example, even though
two loudspeakers can deliver twice as
much acoustic output as a single
loudspeaker, they will not sound
twice as loud. This is an inherent
characteristic of human hearing and
applies to any sound system. For one
system to sound twice as loud as
another, it must produce ten times as
much acoustic power. For
one E130 driven by a 100 watt
amplifier will deliver twice the
acoustic power as an E130 driven by a 50
watt amplifier. The more powerful
system will be noticeably louder, but
not twice as loud
Enclosure Construction
Enclosures for musical instrument
loudspeakers must be solidly built
and all joints should be true and tight.
Lock miter joints are ideal if you have
access to the necessary milling
machinery. Some lumber yards will
cut panels to your requirements,
miter and prepare edges for joining,
Mating surfaces should be reinforced
with glue blocks and wood-screwed
at 100 mm {4 in) intervals to each
surface to insure an airtight cabinet.
An accumulation of small air leaks can
introduce objectionable whistles and
hisses, decreasing output in the low
frequency region. All large panels
should have 25 mmx 75 mm
(lin x 3 in) or 37mm x 100 mm
(2inx 4in) braces glued on edge
about every 10 inches, fastened
securely with screws to prevent
vibration. Bass reproduction in
particular benefits from rigid
enclosure construction.
An enclosure should be constructed
of (19 mm 4 in} material throughout,
either plywood or particle board (pressed
wood). Outside dimensions are not
overly critical, but no single
dimension should be more than three
times any other. For example, an
enclosure with proportions of 1x2x 5
is generally undesirable because the
longest dimension is more than three
times greater than the shortest Recommended Enclosure Volumes We do not recommend using E
dimension. E170 30-85 1-3 cubic feet Series loudspeakers in open-back
The surface area of the loudspeaker Eno litres - enclosures, such as those supplied я
chamber should be lined with a soft, E130 55-115 7-4 cubic feet with other manufacturers’ amplifiers.
absorptive material. The exact amount litres The use of an E Series unit in an open-
and placement of the acoustic E140, E145, back enclosure can result in severe
damping material can be varied over E151 85.295 3.8 cubic feet damage to the loudspeaker, since the
wide limits and adjusted by trial and litres cone assembly is designed specifically
error to give varying degrees of for a properly tuned reflex enclosure
brightness. The less Ported enclosu ith volumes and excessive cone excursion can
padding used, the brighter and more within these ranges will provide more easily occur with an improper
“live” the midrange. The lining can be optimum response for the E Series enclosure.
attached to the cabinet walls by using
poe upholstery tacks or
loudspeakers in their usual lead and
bass instrument applications, When
more than one loudspeaker is to be
Some musicians, however, prefer
the sound character of an open-back
box. If an E Series loudspeaker is
Ordinary 25 mm (1 in) acoustic glass mounted in a single enclosure, the installed in an open-back enclosure,
wool works very well for this volume should be scaled accordingly. the maximum power applied to the
purpose, although any other soft, As an example, for two loudspeakers, speaker should not exceed 50% of its
fluffy, absorptive material (such as approximately twice the enclosure continuous sine wave rating. For
Kimsul, Tufflex or felt rug padding) | le . For some multiple example, an E130, which is rated at 150
purchased from firms such as for lead instrument use, it is often best not have more than approximately 75
hardware stores, lumber yards, to mount the loud ón in a watts applied to it when mounted in
or others that specialize in practical cabinet size and leave the an open-back box.
insulation materials. We do not emelosura acled
recommend the use of Celotex, foam
rubber, Styrofoam, rock wool, Internal Volume Port Area
acoustic tile, cork, cotton, rubberized E110/E120/F130 + E140/E145 /F151
rug padding or Kapok. Litres CubicFeet em? in? ет” nt
_ 2842 _ 1015 2 B — =
Enclosure Volume and Tuning 43-57 1.6-2.0 fd 10 = Ea
Recommended ranges of cabinet | ETE 1-25 77 12 Es = E
volumes are provides tor the E Series 72-85 _ 76-30 90 Re — ral
Speasers, sy Gor oido ety of 86-99 31-35 103 6 65 10
re i ee
a hole) of the s area _ 114-178 2 „1-45 lo Lob 190 ==
a port (open holt) begs baffle — 129-141 46-50 233 36 155 dé
— 147-155 _ 51-55 250 AU 168 26
Porting information contained in — 156-169 5.6-6,0 290 45 181 _ 28
this chart has been developed from 170-185 61-85 348 54 194 "300
listening evaluations which yielded 156-197 6.6-70 374 — 58 26 5
an optimum combination of extended 198-212 71-75 419 65 26 15
low frequency response and mid-bass 213-225 — 7.6-5.0 465 7 245 a
oO O UI 226-240 — 81-85 50 78 258 40
a 241-23 A. A-E.L Gd 2 ва 271 42
amplifier, playing style, and many TEIDE 9.1-9.5 581 ETE Nr 5 ЗЕЛЕНИ
other factors, some variation in tuning RE J o :
may be necessary to obtain the 270-281 9.6-10.0 632 98 323 A
particular tonal quality you desire. 22-297 101-105 2 684 106 38 34
Tuning the enclosure higher (more 298-310 10.6-11.0 723 112005 387 60
port area) will result in stronger mid- 311-326 11.1-11.5 761 118 419 A —
hass performance at the expense of 427-536 116-120 AÑO 124 452 FES
the very lowest tones. Tuning the
enclosure lower (less port area) will
extend the deep bass but will sacrifice
the mid-bass accentuation.
1 Porting information contained in this chart will provide the most
uniform extended low frequency response. Some variation in port area
may be necessary to obtain the particular sound you desire.
1 Port area may be converted to diameter using the formula A= 2571)
When installing a single loudspeaker
the amplifier hook-up wires may be
attached without regard to polarity.
If multiple loudspeakers are wired
illustrate several common
arrangements that will ensure proper
polarity and impedance values.
Consult the manufacturer of your
amplifier to determine its optimum
load impedance, If a choice must be
made between an impedance higher
or lower than that recommended by
the manufacturer, select the higher
impedance. An impedance value
lower than that recommended may
damage your amplifier or
Should your E Series musical
instrument loudspeaker require
service, return it to the [BL dealer
from whom it was purchased. If it is
not possible to contact a dealer, write
directly to the JBL Customer Service
Department describing the difficulty
to the factory must be sent prepaid to
James B. Lansing Sound, Inc, 8500
Balboa Boulevard, Northridge,
California 91329, USA.
For Additional Information
If vou have difficulty in achieving the
fine performance of which your
E Series musical instrument
loudspeaker is capable, consult the
JBL dealer from whom the unit was
purchased. He is equipped with the
knowledge required to provide expert
advice and assistance. If he is unable
to assist you, write directly to the JBL
Professional Division explaining the
difficulty in detail
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