JBL L-1, L-5, L-3, L-7 Owners manual

Orrneds

Manûal

LI

L3
L5

I

K

t

I

The Rigl.rt Choice

IMPORTANT:
L3, Ls,AND L7
MODELS REQUTRE

SOMEASSEMBLY.

For proper stabil¡ty, it is
recommended thatyou use the
molded base
L3,

L5, and

lnstructions begin on the next

page,

third

provided

L7 speaker:

column.

strongly

with each

All of us atJBL would like
congratulate
l- Series Loudspeakers. There
bewildering array of

market today and we know

l'the

that

the choice
probably not

was
We're confident
speakers
exceed

or
tradition of
sound for whíchJBL
Each model incorporates consider­able advanced technology.
enjoythe benefits of
dome hþh frequency transducers,
die cast low frequency transducers

witlr vented
proprietary
Geometry
as
networks with
comPonents

new L Series speakers is designed
to maximíze dispersion and thus
contribute to better stereo

imaging
sound. The slanted
of the speaker not only alþns
each transducers'voice coil
proper phase

stage
parallel
eliminate associated sanding

wave

youVe

your
Your state-of-the-art Ll, L3,
L7

speakers

hþh-definition dividing

The narrow

and a

depth,

internal surÍaces to

resonances.

on choosingJBL

)rou

speakers

to purchase

eaÐ/

an

that the

just

unpacked

expectations.

continue in

precise studio

is

purdtitanium

pole pieces

Symmetrical

magnet

desþn,as

quality

front profile

more open;spacious

front

and better sound

also eliminates

but

to

are a

on

ours

one.

new

will

the long

monitor

famous.

ì6u will

and

Field

well

electronic

your

of

surface

for

L5

Finall¡ all L Series
constructed with
ery
and
colorations whích can.occur

ordinary enclosure.

The

and materials such as
cause of our
in
sional sound reproduction.
loudspeakers

more large superstar
sound systems,
stereo theaters
recording studios

favorite music is
other single company.
audio
make

ing

earnedJBl this top position
professional
has also designed
new L Series home loudspeaker

Ð/stem.

density

hþh
internal

Right Company

We're

the

company

that claim.

The same

and-production f'acility

bracing

able to appb/ technology

preeminent

demanding

are a key

U.S.-based engineer-

sound reproduction

cabínets are

lock-mitre

fìberboard

reduce

to

.'

these be-

position

world

of

part

touring

surÈound

and ttre

where

created

in the

and created

sound

actual

your

than any

No other

world can

¡oin-

baffles

in an

profes-

JBL
of

that

in

your

possible

as

speaker

JBL
tJreir

An important (often
overlooked)

Your
stored in a safe
wfien
(for

warranty validation)

muchyou paid
ance
minute to fill out

tomer
to us.

lfyou have
speakers,
begin

to insure

systems will produce

best sound

step

sales receipt

place.lt

you

bought

for

purposes).

profìle

card and mail

purchased

skip the next

page4,

on

performance.

the loudspeakers

them

Also

the enclosed

PLACEMENT.

your

that

should

be

establishes

and how

(for

ínsur-

please

ake

it back

Ll

sect¡on and

new

ATTACHING
SCRE\ryS AND

BASE

&L7

The molded

L3,

the
intended
appearance,
speaker as well.

Attaching

a

cus-

l. After

carcons, lay
speakers on
soft surhce such as carpeting.

2. Locate
eþht Phillips-head screws
packed

3. Slipthe base onto

4. Secure the
screws.

After

5.
to upright positions,they
ready
listening

,/

(L¡,

L5,

ONLp

provided

base

L5 and L7 are not

to enhance the speaker's

but to sablíze tlre

the base

rcmovingthem from

your

their back on

the speaker base and

in each

returning both

for placement

speaker cafron.

base with the eight

Do

not over-tighten.

room.

only

L3, L5

or L7

each speaker.

speakers

are

in your

with

the

a

Maxim izing Performance

As with any
product
or a loudspeaker - your
monitors will benefit

set-up and installation.
directions

well-engineered

-

be it

a cír6 a computer

in this manual

L

from careful

Follow the

as closely

3

Series

PTACEMENT

The
produces

Where'you putyourJBL

L

Series Loudspeakers can actually
acceÍrtuate tlreir already impressive
music reproduction

Because different

brands and models have dífferent

placement

positioning

best

the best sound

requirements,

capabilities.

speaker

simply

placing your L
where a previous pair
not represent the

your

newJBL

WhileJBL L
sound good
tions in the average listening room
will

maximize the technology in­corporated into
lncluded
drawings

Series speakers

were may

best choice

speaker system.

Series loudspeakers

anywhere, some

designs.

these

on the following

showing the ideal

for

posi-

pages

are

placementfor

The closèr
can come within
lar room, the betten

you

evBn if

dimension and deail due

Çyery

room

to

you

will still be able

excellent fidelity.

Many factors

formance.

you

to

and others may not Thus

each

our drawings you

to

your own particu-

cannot fully

size and

furniture layouq

affect

Some may

L Series model.

Howeven

follow

to enjoy

speaker per-

be important

Drawing

lA- Ll

3'-_rff

Drawing lB - Ll

position

_.

Ear level when

seated in lisæning

position

top view

T_

POS|1lOn

front

view

3'

Drawing lC - L3

3' 3'

Drawing lD - L3

position

position

top

view

front view

4

the ultimate decision
you

put your

system depends

L Series

as much on your
musical priorities'as
room

layouL

Where you put your
speakers
lmaging

seem
speakers, creating
three-dimensional

can affect:

-When

to appear

the per.formers

between

a spacious,

sound

on where

speaker

it does

new

the loud-

stage

on

that

seems

to fill your

under

ideal

can

actually

boundaries

-The

Bass

music

created

string

bass, electric
synthesizer:
Tteble
such
stroked

-

High-frequency

the

as

sheen

with a

room.

conditions,

extend

of

beyond

your

room!

visceral

impact

by bass drums,

bass

ofa cymbal

brush, the

breathiness
singer
te)cure
lin

bow drawn

across

ln fact,

the image

the

of

guitar

or

detail

of

or the

of

a vio-

a string.

Placementfor
stereo

your
system

imaging

TheJBL

L Series

so accurate

engineers

eveÐ/th¡ng you
record
"sound

or

CD can appear

stage"
and extending
loudspeakers.
ing

a

effect requires

positioning.

Most important
sions which determine
of an imaginary

tween

both speakers
main listening position
Fþure lA, lC
owners

see L7 Supplementfor

ment drowing$

Try to

achieve an

the

speakers and

best

who created

speaker's desþned

that virtually

hear

on a tâpe,

on a
centered between
well

beyond the two

To

achieve this

careful

excit-

speaker

are the dimen-

the

angles

triangle formed

and

be-

your

as shown

and lE.

NotqLZ

Þloce

angle between

the main listening

a

in

Drawing

3'

Drawing
5

lE - L5 position

lF - L5

position

t

.tt,l

top view.

fronr

view.

3'

Drawing

placed

ón their

*

2A

Ll

bookshelf

sides,

make öure that

Drawinq

-

28

Ll bookshelf
Speaker-should
of the

bookshelf.

placement,

be at least

front

the tops

view. lf Ll's

åce inward.

placement

tivo inches

roo

view.

îroin back

are

posítion of about
Drawings

that

n"

should

dègreeS.

15

lA,

in each

be angled

60

IC,and

case,the

inward

degrees

lE). Notice

speakers

l0 to

(see

Note that we recommend

use of speaker

speakers.

available; consult

are
dealer for more

stands with

Many styles and

yourJBL

information.

ternativel¡
can
on a
as shown
Drawing
the
page. Note
that
frequency
transducers
should

wards

inside

the

placed on their
sides.
sure

the

Ll

brands

Al-

you

place Ll's

bookhelf

in

2 on

previous

hþh

tlre

to-

be

the

when

Ll's are

Make

leave at

to

least two
the back
back wall

s¡ieakers
Drawing
narrow
ers
position.
image
will have
stâge.

should
only
stereo

Placement
bass

you enjo¡

of

inches of

ofthe

of the

if you

V/hat

as

38 shows

angle

your main

and

The L Series

well in

a slighdy

placement

The

avoided

be

bacþround

imaging

response

matter what

No

bass ís an

tonal spectrum.

the

room between

speakers

bookcase.

cant

shown

between

this configuration,

music with little

effeèc

for best

and the

position

Drawing

in

result of a

the

the speak-

listening

speakers

narrower sound

Drawing 4

in

you want

unless

,

kind of

music

important

L

Series

the

l?

but

!

part

Drawing
Reduceð

38
stereo

­image if speakers

close together

are

reproduce surpr¡s-

speakers
ingly
condition
bass when

fect

room corners and

can

quality

hþh

bass under any

and o<ceptionally

positipned optimally.

modifiable rootn factors af-

Two

L Series bass:

l) proximity

2) disønce from

the rear wall.

your

How close
speaker
wall
"couple"
in increased

systems are

determines how they will

to that

bass at certa¡n

L Series

surface, resulting

quencies. The optimal

from a backwall

lA, lC,

ures

Supplement)
balancêd bass

(as shown in Fþ-

lE

the L7

and

produce

will

in a normal-sized

room.

NOTE:
decrease this
one
low frequency

The closer

placed

mid-bass

produce. lf
extremely
able
ers at
walls
and I E.

You can increase or

distance by about

foot

witlrout

seriously affecting

balance.

tlre

speakers

room corners, the more

tö

(boomy bass) they will

your listening room is

naffowyou may not be

place your L

to

Series speak-

least three feet from side

as shown

in Drawings lA" lC

lf this is the case,
the disønce between
speakers

to allow at

disønce from side

least

walls.

to the

fre-

distances

well-

are

decrease

the two

some

low

back

Placement for best treble

dispersion

High musical sounds create the

fine deails of a musical experience.

High-frequency sounds such as fe-

to

male
upper

are more

violins, lead guitars,

vocals,

piano octaves

directional

and cymbals

tjran bass and

midrange. In other words, these

sounds are best heard

treble
they can
unencumbered
speaker to

pro¡ect directly in

your

Thanks

to their

path

ean

tianium

from the

high frequency transducers,
L

Series speakerc

placement for

to

are less

best treble than
almost any other speaker model..
Howeveçyou will ênjoy
musical o<perience when ttre
L Series'tweeters are at or near

"ear

as shown in Drawings

level"

lB, lD lF and L7 Supplement

reason why we recommend

other
placing L |

's

on speaker

when

an

dome

sensitive

your

best'

stands).

(an-

CONNECTION.

You will

3
3

3 One of

What

the use
Bauge,

wire.
dealen it
maximum
bandwidth
or receiver.

Howeve[ any
stranded
provided it is of the
(thickness).The

ordinary
"zipcord'),

and home

The

use depends on the
wire between
your

need...

Speaker wire
A tape measure

i

É'

the following depending

on wire type and

thickness:

Wire strippers, diagonal

pair

or a

knife

kind of wirc to

For best results,we

of scissors

use

recommend

of specially desþed

ultralow

resistance

Available from

ís able to conduct

speaker

yourJBL

the

power and frequency

your

of

amplifier

insulated, multi-

copper wire

lamp cord

may be used,

proper

easiest

(also

gauge

to obtain

called

available at hardware

improvement

stores.

minimum size of wire

length ofthe

the amptifier and

L Series

Speakers.

pliers,

heavy-

to

a

is

I

;

¡

I

Y

Drawing 5

following

The

chart shows the

maxÍmum lengths for different wire

gauges

|youq

WIRE LENGTH
Upto20ft

Upto30ft
Upto50ft
Almost any

length

Pr.eparing

measured

as

amplífier

,

.,.

1

the

onewoyfrom

to

the speakerl.

GAUGEz OF
COPPERWIRE

gauge

l6
l4 gauge
l2 gauge

Special speaker cable

hookup

wire

l. First determine the disønce

between
speaker and
tem. lf
speaker

this could be

2. Now make the hookup
for both speakers thìs

the most distant

your

stereo sys-

you

want to conceal the

wires along

baseboards,

quite a few fee¿

wires

lenglh,
even if one L Series Loud­speaker

is much closer to

your
amplifier than the othen You
may need to loosely

coil

up

part

of one channel's wire behind the

if

amplifier

speaker is quite

one

close and the other far away

from the amp or receiver...

HOWEVER,

IT"d"rlcal

wire
otm læd o¡erthe dsar¡ces
indræd represent

0. I I I <frn resisanceq r€sp€cdr/dy.
2

iîcr€âses In
ntrrùer, the thirj<er tlp wire.

n"to In effecq we are reconrnerdirg

garges which

C"ra" *nnæ. aucroto as wire &mger

odrc¡'words,

keeping

yidd

l€ss úEn O-ftB bss

0. I 82€[rm 0. | 72€tùn and

both wire

+ecificed

the lowerthe

Ttre

garye

wiú

galges

your

lengths the same will help

maintain

proper sþnal balance

and imaging.

NexC separate the two conduc-

3.
that comprise

tors
for a distance of
Then strip

off

each wire

about

of insulation

3/8"

one inch.

from both ends of each conduc­tor using a wire strippen
diagonal

pliers

or knife as shown

in Drawing 5.
Twist

4.

a tightly-bunched

set of thin wires into

each

spiral. lf your
wire is except¡onall), thick ( 12­gauge zipcord or special speaker
interconnect cable), divide the
strands
and twist each into a spiral.

.

At this point

5.
tifr a

into

three equal bundles

you

need to iden-

visual difference between

the two twisted wire bundles

make up each speaker

that
This may be
ways
brand

done in

depending on the type and

of wire

you're

wire.

various

using. Dif­ferentiating marks can be a
different color wire (copper or
"silYer"),
conductoG
one
or a

a4

of the

a strand of

thin, raised ribs on

paft of the

printed

"+"

insulators. lt does not

yarn

in one

insulation,

outer

marking on one

make any difference which of
the two strands of

(+)
amplifieri
ers are

(-) on

and

the speakers and

as long as both speak-

connected identically.

wire

go

to

Connectint
your

L-Series

NotsfT owners see

ment

additionol

for

ond inst¡uoions.

Before hooking up the

l.

speaker

wires, make sure that
your receive[
or integrated amplifier
turned off.

Look on the back of

2.
receiver. You'll see
+

(red)

and

output terminals for both rþht

leftspeakers.

and

3. Connect both conductoÊs of
each speaker
speaker output
Note: ln some cases, the amp/
receiver has two complete sets

of speaker

'4"

and

"B".

necting one

suggest

you

terminals.

4. Each L Series speaker also has

corresPonding
nals on their back sides. lt is
important to hook botJr speak­ers up to the
receiver speaker terminals in
identical manner

-black

and
they are

"in

Drawing 6 closely when con­necting the speaker
you mix up thb + and

amplifier to

Speakers

L7

Suþple

hook-up drowinç

prepared

power

amplifier

is

your

amp/

individual

-

(black)

speaker

wire to the

terminals.

terminals, marked

lf you're

just

con-

set of speakers,

use

+

left

-black)

to

phase".

-termi-

¿¡¿

right

and

(+red

so that

Follow

wires.

set of

+red

to

amp/

lf

"A"

the

-

!

we

an

*

B

''U

â

''ç

f
I the

I
t

conneccions, thin

poor stereo image

poor stereo image

willresult

first unscrgw

First unscrgw
enough

enough

your

your
insert it through

insert it through
gently tighten the
are using thicker wire, first
seParate the strands

equal
center bundle through
minal shaft hole
outer bundles around
before tþhtening.

5. Finall¡ make sure
the strands
either

Rear of

speaker as viewed from

sound witlr

and less b

and less bass

terminall

terminalf'ar

each

. t'

terminal's

wire is thin enoqgh,sim¡

wire is thin enoqgh,simply

bundles.

of

each

to exöose tlç hole in

to exÞose tlç hole in

centenshaft" lf

the hole and

the hole and

knob. lf you

into three

Then insert the

the ter-

and wrap the

the shaft

that none of

which make up

the two speaker

RIGHT

L

wire

Series

back

ffit rffi

++

RIGHT LEFT

conductors cross
terminals
site
strands can cause

lf you're

of

speakers,
ahead in this manual to the
OPERATION

Hooking
sets ofspeakers

lf your

plete

sets of speaker

"B'),

and
additional pair
ampleJBL Pro lll personal
monitors, for

in

another room.

Howeveq some

Rear

and touch the oppo-

connectjon. Out of place

only connecting one

up multiple

receiver has two

it's possible

simultøneous sound

LEFT

of

as viewed from

between

a short circuit

you

may now

section.

terminals

to hook up

of speakers, for

speakers may

L Series

skip

com-

o<-

back

not be useable as a second pair if

you

want to

Before
ofspeakers besides
check the following specífications:

set

l. Your

2. The

BotJr

expressed in ohms and both can be

('.A"

found in

an

which
receiver

receiver's
ance is determined by whetlrer or
not

Power

4 ohms

the following

owner's
POWER:

A) 100watts RMS into

I ohms. both channels
driven, 20-20kHz with less

than 0.02% THD

B)
4'ohms. both channels
driven, 20-20kHz with less
than 0.02% THD

Part B indicates

fìer

can handle 4-ohm combined

impedances created
of speakers. lf
rating is given,

the

amp/receiver isnt designed

to handle 4-ohm combined ratings

if

even
speaker terminals

play

both

hooking up another set

amplifien's MINIMUM

LOAD

IMPEDANCE

set of speakers

came with

it does have two sets of

impedance

NOMINAL

of these specifìcations are

the owner's manuals

your

and speakers.

minimum load imped-

ratings are

and 2 ohms. For example,

in an

entry

manual...

160watts RMS into

that

only an 8-ohm

assume

on

sets

oìce.

at

your

L Series,

of the second

amp/

The

given

for

amplifier

the ampli-

two sets

by

that

its

back

side.

I

:

I

Through an

combined

(created

ances

of speakers

,;-sêts

prodqcg, a lpwer total

just

than
two sets of 8-ohm

in a 4-ohm combined

lf the combined
one L Series speaker
tension speaker

recommended

amp/receiver

algebraic

nominal speaker imped-

connecting two

by

to an

impedance

one set

For

speakers

impedance.

impedance of

and one

is lower thon the

minimum

may not be able
produce any appreciable
before triggering
protection

determining

After

lmpedonce of

ers and

tlre minimum allowable
load impedance
receiver can
chart at rþht.
impedance

can be

which
volumes

L Series
listening

your amplifìer is r¿ted

lf
&-ohm

sìmultaneously

speakers

room.

loads...combine

Ll's with
L3's with

its internal

circuits

or fuse.

the Nominol

the extension

tlrat the amp/

handle, consult the

lt indicates the

extension

of

played

at

your

in

l6-ohm extension

speakers

only.

l6-ohm octension

speakers only.

L5's witJr
L7's with

l6-ohm extension

speakers

only.

l6-ohm octension

speakers

only.

formulal,

amplifier)

example,

result

o<-

your

load,

to

volume

speak-

speakers

normal

with

main

for

iust

the

your

lf

amplifier

well as 8æhm
Ll's with

L3's with
L5's with

L7's with

your

lf

amplifier

ohrn and

's

L |

with

L3's with

L5's with
L7's with

NOTE:
raæd for
speakers
want to

once all over

ers at
you

will
matching/switching
yourJBL dealer
information. Also,
temptation

set ofspeakers

one
of amp/receiver
no matter what
minimum

is rated

loads, combine...

l6-ohm or 8-ohm

extension

or8-ohm

l6-ohm

e><tension

octension

l6-ohm

speakers only.

f 6-ohm extension

speakers

rated for 2+hm,4-

is

loads, combine..

S<,hm

| 6-ohm,

4-ohm extension

speakers.

l6-ohm,8-ohm

4-ohm extension

speakers.

l6-ohm or

octension

l6-ohm or 8-ohm

octension

your receiver is not

lf

8-ohm or

the kind of exænsion
you'd like to add,or

power many

your house,

need a special

box Consult

for more

avoid

to hook any

up to each

speaker

the amp/receiver's

load impedance

rated

for 4-ohrn as

speakers.

speakers.

only.

.

or

8-ohm

speakers.
speakers.

you

if

sets of speak-

impedance

the

more than

set

terminals

is.

OPERATION

Amplifier

Each L Series
maximum and
råting. Using
rating listed
manual for

lead to

can
doesnt

ample,
250-watt
that
turn
output o<ceeds
recommended
particular L Series

While

amplifìer

wont

produce an unpleasant audible

can
effect called

sound

ers

amp's volume

the

you're

up,
ping.lf this effect
wish

speakers

JBL

ume levels,
witlr
The extra

reduce clipping,
sound and
you

want

distortion.

power

speaker

minimum

more

page 12 of this

on

particular model

your

potential

you

mean

cant

20O-watt-rated

amplifier:

you

must

be careful

up the volume

the

power

speakers.

using a very

volumes

at high

damage L Series

"clipping."

fu:zy or

distorted

control

hearing

advanced

occurs and

regularly enjoy

to

extremely

at

in an amplifier

invest

RMS wattage

more

reseryes

improve overall

get

you

let

without

unpleasant

power

power

damage. That

use,for ex-

L |

lt DOES mean

and not

high that its

so

maximum

for

low

speakerc,

lf the speak-

your

output

power

of

the loudness

has a

than the

's

with a

your

È

pbwered

probably

when

is turned

clip-

you

new

high

vol-

will

it

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At this poing it's

you

sure
speaker connêGions correctly
and then st¿rc enioyinlkheml

l. With the amp/receiver still

turned off, confìrm ttrat its vol­ume control is turned allthe

way DOWN. NexÇsetthe

BALANCE
position. Alsq
receiver hasA/B
set ¡t to correspond to the set
of speaker output term¡nals
connected

speakers.

2. Now turn on
receiver and a music source
such as CD
or FM station.

Select that source

3.
receiver
PLAY on the music source

comPonent

4. GENTLY turn up the volume
control until
from both L Series
(lf

one or both channels

produce

not
"Troubleshooting"

Rotate the amp/receiver

5.
BALANCE control allthe way
to the LEFI. Sound
come from
lf the sound comes from the
RIGHT speaker with the

ance control

have been reversed during

wires

drivet'

time to

made the amplifìer-to-

controlto

if the amp/

speaker switch,

to the L

your

player;

front panel

you

hear sound

sound, consult

the left

LEFI,the

make

its

center

Series

amp/

cassette deck

on the amp/

press

and

speakers.

do

).

should only

speaker:

bal-

speaker

hook-up. Turn the amp/receiver
off and switch both
speaker wires.

ó.

-

lf sound moves to the appro-

priate

speaker when the

BALANCE
the corresponding direction,
you're ready
L

Series speakers. lf not,

consult

Caring for
speakers

general,

In

be all the c¿re necessary
L Series' cabinet fìnish does

need

waxing or oiling. However; if
the enclosure surhces
dirty,they may
damp

cloth or a

for a sealed

use a pump
recdy

on the speakers since
over-spnry
L Series' speaker cones. lnstead,

apply cleaner to a soft rag
wipe it onto the cabine¿

To remove dust from

cloth, use a vacuum with a brush

attachmen¿ Spots may

removed with

sPot

remover.

Trnoubleshooting

The vast majorÇ
speaker
being traced

switch settlngs.

"malfunctions"

control

to enjoy

"Troubleshooting'.

your

L Series

a light dusting should

be cleaned with a

cleaner

fìnish.

wood

or spmy cleaner di-

could be harmfulto the

a commercial

to connections or

To avoid

sets of

is

rot¿ted in

your

since

become

suiøble

the

be

new

of

end up

packing

new

the

not

Never

the

and then

grille

up correctly functioning
and sending them off,
that they're not really at

tlre following tips fìrst, before

requesting service.
No sound at all from

either speaker

l.

Amp/receiver tape

pushed in

ton

phono

FM or

2. Wrong speaker switch
pressed

"A"

both
outPuts.

3. Sound source
deck turnable) not turned
not activated or not

amp/receiver front,

No sound

l. Balance

way left or

2.

Speaker

has become
either the speaker or the
amp/receiven

3. One of the
between sound source and amp/
receiver is faulty or has become

disconnected.

Both speakers
umes but shut offas volume
incrcased OR sound turns on

and offintermittently

few

l. A

strands of speaker

may be
the
Re-check connections.

shorting

speakers or amp/receiven

while

inputs.

if the amp/receiver

"B"

and

fiom one speaker

control

righr

wire to that speaker

disconnected at

connections

play

speakgrs

only to find

fault" check

'

monitor but-

using CQ

is

sets of speaker

(CD

cassette

selected on

panel.

turned all the

at lowvol-

wire

out at either

has

on,

is

il