JBL STADIUM 1024 Manuale utente

Subwoofer

Owner•s

Manual

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Manual del propietario del

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THANK

YOU

for

choosing

a

JBL

Stadium

subwoofer.

These

subwoofers

are

designed

to

suit

a

broad

range

of

car

audio

applications

and

can

be

used

in

a

wide

variety

of

enclosure

types

to

produce

extended,

powerful

bass

in

a

limited

amount

of

vehicle

space.

To

get

the

most

performance

from

your

new

subwoofer,

it

is

strongly

recommended

that

you

have

a

qualified

professional

install

your

subwoofer.

Although

this

manual

does

provide

general

instructions

about

installing

these

Series

subwoofers,

it

does

not

include

enclosure

construction

details

or

exact

installation

methods

for

any

particular

vehicle.

If

you

do

not

feel

that

you

have

the

necessary

experience,

do

not

attempt

the

installation

yourself,

but

instead

ask

your

authorized

JBL

dealer

about

professional

installation

options.

Remember

to

keep

your

sales

receipt

in

a

safe

place,

along

with

this

manual,

so

that

both

are

available

for

future

reference.

WARNING

Playing

loud

music

in

a

vehicle

can

h_inder

your

ability

to

hear

traffic

and

permanently

damage

your

hearing.

The

maximum

volume

levels

achievable

by

JBL

speakers

when

combined

with

high-power

amplification

may

exceed

safe

levels

for

extended

listening.

Using

low

volume

levels

is

recommended

when

driving.

JBL,

Inc.

accepts

no

liability

for

hearing

loss,

bodily

injury,

or

property

damage

as

a

result

of

use

or

misuse

of

this

product.

REPRODUCING

BASS

IN

VEHICLES

Depending

on

the

size

of

your

vehicle's

interior

listening

space,

reproduced

bass

frequencies

below

80Hz

will

be

boosted

by

nearly

12dB

per

octave

as

frequency

decreases.

This

phenomenon,

known

as

the

vehicle's

transfer

function

(or

cabin

gain),

plays

an

important

role

In

shaping

the

subwoofer's

frequency

response

In

your

vehicle.

SUBWOOFER

ENCLOSURE

TYPES

The

subwoofers

are

designed

to

perform

best

in

moderately

sized

sealed

enclosures,

vented

enclosures

and

prefabricated

band-pass

enclosures.

Infinite-baffle

mounting

is

possible,

but

the

subwoofer's

mechanical

power

handling

will

be

reduced

because

there

will

be

no

volume

of

air

to

stiffen

the

subwoofer's

suspension

and

prevent

overexcursion.

If

you

choose

infinite-baf-

fle

mounting,

consider

the

RMS

and

peak

power-handling

ratings

to

be

half

of

what

is

listed

in

the

specifications

in

this

manual

.

You

should

choose

an

enclosure

type

based

on

the

amount

of

cargo

space

you

can

devote

to

the

enclosure,

the

amount

of

power

you

will

use

to

drive

your

subwoofer(s),

and

your

listening

habits

.

SEALED

ENCLOSURES

The

air

trapped

inside

a

sealed

enclosure

is

compressed

when

the

subwoofer

moves

rearward

and

is

rarefied

when

the

subwoofer

moves

forward.

In

both

cases,

the

air

inside

and

outside

the

box

will

seek

equilibrium

by

pushing

and

pulling

on

the

subwoofer

cone.

The

result

is

a

stiffer

suspension

when

compared

to

the

subwoofer

operating

in

free

air.

This

means

that

the

subwoofer's

cone

will

be

harder

to

move

at

low

frequencies,

a

condition

which

protects

the

subwoofer

from

physical

overexcursion,

but

requires

more

power

than

other

designs

to

achieve

a

given

acoustic

output.

SEALED-ENCLOSURE

PERFORMANCE

ADVANTAGES

·The

in-vehicle

performance

will

have

the

flattest

overall

frequency

response.

•

The

in-vehicle

response

will

have

the

widest

bandwidth.

(Usable

low-frequency

response

inside

the

vehicle

will

be

below

20Hz.)

•

An

optimum

sealed

enclosure

will

always

be

smaller

than

an

optimum

enclosure

of

another

type.

SEALED-ENCLOSURE

PERFORMANCE

TRADE·DFFS

·An

optimum

sealed

enclosure

will

have

lower

overall

efficiency

than

an

optimum

enclosure

of

another

type.

•A

subwoofer

in

an

optimum

sealed

enclosure

will

require

more

amplifier

power

to

achieve

a

given

acoustic

output

than

in

an

optimum

enclosure

of

another

type.

SEALED-ENCLOSURE

CONSTRUCTION

Sealed-enclosure

construction

is

straight-

forward

and

forgiving

of

errors

in

volume

calculation,

but

air

leaks

should

be

avoided.

Use

medium-density

fiberboard

(MDF),

glue

and

screws

to

construct

the

enclosure,

and

seal

all

joints

with

silicone

caulk.

RECOMMENDATION

Subwoofers

in

sealed

enclosures

are

recommended

for

enthusiasts

who

prefer

accurate

music

reproduction

and

flat

frequency

response,

for

those

who

have

a

smaller

space

to

devote

to

a

subwoofer

enclosure,

and

for

those

who

have

plenty

of

amplifier

power

devoted

to

driving

the

subwoofer.

The

sealed-enclosure

design

indicated

in

this

manual

represents

the

best

compromise

between

low-frequency

extension

and

flat

response.

VENTED

ENCLOSURES

A

vented

enclosure

acts

like

a

sealed

enclosure

at

frequencies

above

its

tuned

(resonance)

frequency.

At

resonance

(which

is

defined

by

the

vent),

the

vent

produces

the

majority

of

sound-

the

subwoofer

cone

is

nearly

stationary

while

the

air

inside

the

vent

vibrates.

This

provides

greater

mechanical

power

handling

at

and

above

resonance,

but

reduced

mechanical

power

handling

below

resonance.

Since

the

subwoofer

cone

and

voice

coil

don't

move

much

at

resonance,

airflow

across

the

voice

coil

is

minimized

and

thermal

power

handling

is

reduced

slightly

at

resonance.

Vented

enclosures

provide

better

efficiency

in

the

40Hz

-

60Hz

range,

at

the

expense

of

sound

output

in

the

lowest

octave

(below

40Hz).

The

use

of

an

infrasonic

filter

is

recommended

with

vented

enclosures.

An

optimum

vented

enclosure

for

a

Series

subwoofer

is

larger

than

an

optimum

sealed

enclosure.

VENTED-ENCLOSURE

PERFORMANCE

ADVANTAGES

•

An

optimum

vented

enclosure

has

greater

efficiency

and

higher

output

in

the

40Hz-

60Hz

range

than

an

optimum

sealed

enclosure.

•

An

optimum

vented

enclosure

provides

a

greater

sensation

of

bass

than

an

optimum

sealed

enclosure.

• A

subwoofer

in

an

optimum

vented

enclosure

will

require

less

amplifier

power

to

achieve

a

given

acoustic

output

(down

to

the

enclosure's

resonance

frequency)

than

in

an

optimum

sealed

enclosure.

VENTED-ENCLOSURE

PERFORMANCE

TRAOE-OFFS

•

Reduced

output

in

the

lowest

octave

(below

40Hz).

•

Reduced

mechanical

power

handling

below

the

enclosure's

resonance

frequency.

The

use

of

an

electronic

infrasonic

filter

is

strongly

recommend-

ed

to

reduce

the

chance

of

overdriving

the

subwoofer

below

the

enclosure's

resonance

frequency.

•

An

optimum

vented

enclosure

will

always

be

larger

than

an

optimum

sealed

enclosure.

VENTED·

ENCLOSURE

CONSTRUCTION

Vented-enclosure

construction

is

more

difficult

than

the

construction

of

a

sealed

enclosure.

The

enclosure

volume

and

port

dimensions

have

a

specific

relationship

with

the

physical

and

electromechanical

characteristics

of

the

subwoofer,

requiring

that

the

recommended

enclosure

volume

and

port

characteris-

tics

be

strictly

observed.

As

with

sealed

enclosures,

use

medium-density

fiberboard

(MDF),

glue

and

screws

to

construct

the

enclosure,

and

seal

all

joints

with

silicone

caulk.

RECOMMENDATION

Subwoofers

in

vented

enclosures

are

recommended

for

enthusiasts

who

prefer

accentuated

bass

response,

for

those

who

have

plenty

of

cargo

space

to

devote

to

a

subwoofer

enclosure

and

for

those

who

will

use

a

less

powerful

amplifier

to

drive

their

subwoofer.

The

volume

and

port

dimensions

indicated

must

be

followed

precisely

to

ensure

optimum

performance.

MOUNTING

THE

SUBWOOFER

The

subwoofers

should

be

mounted

from

the

outside

of

the

enc

l

osure.

Use

the

included

foam

mounting

gasket

to

ensure

a

leak-free

seal

between

the

subwoofer

frame

and

the

enclosure.

CONNECTING

THE

SUBWOOFER

SETTING

THE

IMPEDANCE

The

Stadium

subwoofers

both

feature

the

Selectable

Smart

Impedance

~

(SSI)

switch.

This

exclusive

feature

lets

you

set

the

subwoofer's

impedance

to

either

2

ohms

or

4

ohms

with

the

flip

of

a

switch

(see

illustrations

below).

This

allows

you

to

extract

the

most

from

your

subwoofer

amplifier

In

any

situation.

The

SSI

2-ohm

setting

increases

the

subwoofer's

output

over

the

4-ohm

setting

by

up

to

3dB,

depending

on

the

amplifier.

Performance

is

identical

in

all

other

respects.

If

the

connected

amplifier

is

rated

for

2-ohm

operation

and

its

2-ohm

power

ratings

are

within

the

subwoofer's

power-handling

specifications,

setting

the

SSI

switch

in

the

2-ohm

position

will

achieve

maximum

output.

40

c

~n~~~o

20

o(?~=

2-0hm

Setting

4C

rnJIID

)

2C

o(?

~

=

-

~

4-

0hm

Setting

IMPORTANT:

Make

sure

the

subwoofer

amplifier

is

turned

OFF

before

setting

the

SSI

switch.

Oo

not

change

the

switch

position

while

the

subwoofer

amplifier

is

operating.

Doing

so

could

damage

the

amplifier.

CONNECTING

THE

AMPLIFIER

The

subwoofer

connectors

are

compatible

with

bare

or

tinned

wires.

The

recommended

wire

gauge

is

between

14AWG

and

BAWG,

depending

on

the

length

of

the

wire

run

between

the

amplifier

and

woofer.

Heavier

gauge

wire

is

preferred

for

runs

over

6'

(2m).

TECHNICAL

DATA

Stadium

1024

THIELE-SMALL

PARAMETERS

20 40

VotcE-COtL

DC

RESISTANcE:

VotcE·COIL

INDUCTANCE

@

1KHz:

DRIVER

RADIATING

AREA:

MoToR

FoRcE

FAcToR:

CoMPLIANCE

VoLUME:

SuSPENSION

CoMPLIANCE:

MOVING

MASS,

AtR

LOAD:

FREE·AtR

RESONANCE:

MECHANICAL

0:

ELECTRICAL

0:

Tom

O:

MAGNETIC-GAP

HEIGHT:

VotcE-CotL

HEtGHT:

MAXIMUM

ExcuRstoN:

REVC

(OHMS)

..•.....

1.80

....

•

..•.

4.06

LEvc

(MH)

.........

1.04

..

.

......

0.91

So

(tN

2)

..........

53.69

........

53.69

So

(cM

2)

.........

346.36

..

... ..

346.36

BL

(T.)

....

"

....

10.54

........

14.98

VAS

(FT

3

),

..

,

...

,

..

0.86

,

.......

,

0.89

VAS

(LITERS)

,,,,,,,

24.22

,,,,,,,,

25.27

CMs

(IJM/N)

..••.•

144,00

,....••

150.00

MMs

(GRAMs)

..••..

188.72.,

,,

...

185.47

Fs

(Hz)

,

....

,

30

.

56

....

,•••

30.18

OMS•

••

'

•••.•.....

3.11

••

...

....

2.17

0Es

...•.

...

.,•,,,

0.57

....

,

••

,.

0.61

0TS

,,,,,,,,,

...

,,

0,48,

,,,,,,,,

0.48

HAG

(iN)

.......

" ..

0.39

" " ' •" •

0.39

HAs

(MM),,,

•••.••

10.00

.•....••

10.00

Hvc

(tN)

...........

1.32

,.. .. ..

..

1.32

Hvc

(MM)

,,,,,,,,,

33.50

••

,,,•••

33.50

XMAX

(iN)

....

......

0.47

,

........

0.47

XMAX

(MM)

,

......

,

12,00

.....

,

..

12.00

SEALED-BOX

VOLUME

(INCLUDES

DRIVER

DISPLACEMENT)

(side

view

)

V

80

x=

0.50

ft

3

(14.20

liters)

VENTED-Box

VOLUME

(INCLUDES

DRIVER/PORT

DISPLACEMENTS)

r

Port

length

=

11.3"

18

=

30.0Hz

(side

vi

ew)

C"

V

80

x=

1.5

ffl

(42.5

liters)

SPECIFICATIONS

DIAMETER:

SENSITIVITY

(2.83V

@

1M):

POWER

HANDLING:

FREQUENCY

RESPONSE:

NOMINAL

IMPEDANCE:

VotcE·Co

tL

DtAMETER:

DIMENSIONS:

t

diameter

=

3"

76mm

10"

(254MM)

91dB

450Wrms

(1350W

PEAK)

30Hz

-175Hz

2

OR

4

OHMS

21/2"

(S3MM)

mounting

de

pth

moun

tin

g

h

eight

6·15/16"

(175

mm

) 3/

4"

(

18

mm)

+

.

e:t=====~:,:

__j___

-

-----'---

cutout

diameter

•lit

9·7

/

16"

(2

39mm)

outer

diameter

11"(

279

mm)

l.Use

a

2.5

mm

hex

driver

to

open

the

cohnectors

2.1nsert

the

wire

ends

into

the

connector

openings

NOTE:

If

using

untinned

bare

wire,

be

sure

that

no

stray

"+"and

"-"strands

touch

each

other.

Touching

strands

can

cause

a

short-circuit

,

which

can

damage

your

amplifier.

3.Use

the

hex

driver

to

secure

the

wires

in

the

connectors,

as

shown

in

the

illustration

to

the

left

THIELE-SMALL

PARAMETERS

VotcE-CotL

DC

RESISTANcE:

VotcE-COtL

INDUCTANCE@

1KHz:

DRIVER

RADIATING

AREA:

MoTOR

FoRCE

FAcToR:

CoMPLIANCE

VoLUME:

SusPENSION

CoMPLIANCE:

MovtNG

MAss,

AtR

LoAo:

fREE-AIR

RESONANCE:

MECHANICAL

0:

ELECTRICAL

0:

Tom

0:

MAGNETIC

-

GAP

HEIGHT:

VotcE·CotL

HEtGHT:

MAXIMUM

ExcuRstoN:

Stadium

1224

20 40

REVC

(OHMS)

.••.....

1.82

....•..••

4.07

LEVC

(MH)

.........

1.03

.........

0.94

So

(tN

2)

..........

82

.

29

....

..

82

.

29

So

(cM

2)

.........

530

.

93

.... ..

.

530.93

BL(T.)

.........

11.70

........

16.99

VAS

(FT

3)

..........

1.93

.........

1.86

VAS

(LITERS)

,

......

54.65

........

52.59

CMs

(IJM/N)

......

138.00

......

•

133.00

MMs

(GRAMS)

•....•

220.58

.•....•

225.64

Fs

(Hz)

....•.

...

.

28.84

.•.•.

..•

29

.

07

OMs

....•••..•.•••

4.29

••••..•••

2.56

0Es

•.•••........•

0.53

••••.....

0.58

0Ts

..•••••.

,•••••

0.47

•..••.•••

0.47

HAs(IN)

.....

"

....

0.39

..

" "

..

.

0.39

HAG

(MM)

" " •" "

10.00

" " " "

10.00

Hvc

(tN)

...........

1.32

.... ..

...

1.32

Hvc

(MM)

•••••••••

33.50

•,

••••.•

33.50

XMAX

(IN),

..

,

.....

,

0.47

........

,

0.47

XMAX

(MM)

....

,.. ,

12.00

........

12.00

SEALED-

Box

VOLUME

(INCLUDES

DRIVER

DISPLACEMENT)

(side

view)

V

aox=

0.

75

ft

3

(21.20

liters)

VENTED-BOX

VOLUME

(INCLUDES

DRIVER/PORT

DISPLACEMENTS)

(side

view

)

V

aox=

2.5

ffl

(70

.8

liters)

SPECIFICATIONS

DIAMETER:

SENSITIVITY

(2.83V@

1M):

PowER

HANDLING:

FREQUENCY

RESPONSE:

NOMINAL

IMPEDANCE:

VotcE-CotL

DtAMETER:

DIMENSIONS:

t

mounting

dep

th

7"

(177m

m)

+

r

length

=

11.7"

Port

r~

f

a=

3D.DHz

diameter

=4"

102mm

12"

(305MM)

92dB

500Wrms

(1500W

PEAK)

25Hz

-175Hz

2

OR

4

OHMS

21/2"

(63MM)

11-1

/8"

(2

8

2m

m)

outer

diameter

12

·13

/1

6"

(32

4mm

)

HA

RMAN I

nt

ernational Industries, I

nc

.

8500

Ba

lboa Boulevard, Northrid

ge

,

CA

91329

USA

rn

ational

In

dustri

es

HARMAN

JBL

is a

tr

adem

ark

of

HARMAN Inte

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