Manuale JBL GTO4000 Amplificatore auto

Manuale

Thank you for purchasing

a JBL GTO amplifier. In

order that we may better

serve you should you

require warranty servi-

ce on your new ampli-

fier, please retain your

original purchase receipt

and return the enclosed

warranty

registration card.

Important: Installation of

automotive ste-

reo

components can require

extensive experience in

performing a variety of

mechanical and electrical

procedures. Although

these instructions

explain, in a general

sense, how to install GTO

amplifiers, they may not

show the exact installa-

tion methods for your

particular vehicle. If you

feel you lack the tools or

necessary

experience, ask

your

authorized JBL car-audio

dealer about professional

installation options.

Installation Warnings

and Tips

• Always wear pro-

tective eyewear when

using tools.

• Turn off all audio

systems and other elec-

trical devices before

you start.

• Disconnect the

negative (-) lead from

your vehicle’s

battery.

• Check clearances

on both sides of a plan -

ned mounting surface

before drilling any

holes or installing any

screws. Remember that

the screws can extend

behind the surface.

• At the installation

sites,

locate and make a note of

all fuel lines, hydraulic

brake lines, vacuum

lines and

electrical wiring. Use

extreme caution when

cutting or drilling in

and around these areas.

• Before drilling or

cutting holes, use a uti -

lity knife to remove

unwanted fabric or

vinyl to keep material

from snagging in a drill

bit.

• When routing

cables, keep input-

signal cables away from

power cables and spea-

ker wires.

• When making

connections, ensure that

they are secure and

properly insulated.

• If the amplifier’s

fuse must be replaced,

use only the same type

and rating as that of the

original. Do not substi-

tute another kind.

Warning: Playing loud

music in an automobile

can permanently damage

your hearing as well as

hinder your ability to

hear traffic. W e recom-

mend listening at low

levels while in your car.

JBL accepts no liability

for hearing loss, bodily

injury or property

damage resulting from

use or misuse of this

Wiring the Input-Signal Connections

Connect a pair of signal cables with RCA-type ends

between the connectors on the amplifier and the RCA-

type signal connectors on the source unit. If your

radio has only speaker-level outputs, you must pur-

chase a speaker-level-to-line-level adapter,

commonly sold as an accessory.

System Setup and Adjustement

Refer to figures 1-3 for location of adjustement

switches and controls.

Electronic Crossover

The electronic crossover can be selected as a 12dB/oct

high-pass filter (HPF), 12dB/oct low-pass filter

(LPF) or it can be defeated (OFF). The crossover fre-

quency can be set at any

frequency between 30Hz and 320Hz.

Input Sensitivity

initially, turn the input-sensitivity LEVEL control to

its maximum (counterclockwise) position. Turn on

the source unit and

increase the volume control until it is approximately

three-

quarters of maximum-output level. Slowly increase

the input LEVEL control (clockwise) while listening

to the quality of the reproduced sound. When you hear

distortion on the music peaks, turn the LEVEL control

back slightly. This is the maximum undistorted output

level of your system. Turning the LEVEL control up

farther WILL N OT INCREASE THE OUTPUT POWER OF

YOUR AMP! It will only decrease the amount of volu-

me control rotation before the amp is at full output

power. It will also increase the amount of extraneous

noise in your system.

Choosing a Location and Mounting the Amplifier

Amplifiers need air to stay cool. Suitable locations are

under seats (provided the amplifier doesn’t interfere

with the

seat-adjustement mechanism), in the trunk or in any

location that provides enough air for the amp to cool

itself. Do not mount the amplifier with the heat-sink

fins facing downward; this makes convection cooling of

the amplifier impossible.

Mount the amplifier so that it is not damaged by the

feet of back-seat passengers or shifting cargo in the

trunk. Mount the amplifier so that it remains dry -

never mount an amplifier

outside the car or in the engine compartment.

Using the amplifier as a template, mark the location of

the mounting holes on the mounting surface, drill

pilot holes and attach the amplifier to the mounting

surface with screws. Make sure the amplifier is

mounted securely.

Wiring the Power Connections

Refer to Figures 1-3 for connector locations. Use at

least 6 mm

2

wire for power and ground connections.

For power, remote and ground connections strip off

one end of each jacket to reveal bare wire for inser-

tion into the

barrier-strip connectors. Connect a wire from the

GND

connector on the amplifier to the nearest bare-metal

chassis component; scrape away the paint to ensure

good

conductivity. Next, connect a wire between the BATT

terminal on the amplifier and the POS (+) terminal of

the vehicle’s

battery. Pass the wire through a factory-installed

grommet in the firewall, or install a grommet if a

factory grommet is not

available. You must install, within 45 cm of the bat-

tery

connection, a fuse holder and fuse with the same rating

as the fuse in the amplifier’s chassis. This will pre -

vent a short circuit from causing damage to the

amplifier or the car. Connect a wire

between the REM terminal of the

amplifier and the

“remote out” or power-antenna lead

on the vehicle’s radio.

Wiring the Speaker-Output Connections

Connect the speakers, observing proper polarity, to

the speaker-output barrier

strip. The total impedance

of the speaker system

connected to the amplifier

when the amplifier is

driven in stereo must be at

least two ohms.

If you are bridging the

amplifier, connect the speaker

wires to the terminals marked

“bridged”, observing proper polarity. The total

impedance of the speaker system connected to the

amplifier must be at least four ohms in bridged mode.

If you are running the amp in Tri-Mode (stereo and

mono simultaneously), connect the satellite speakers

to the

speaker connector as you would a pair of stereo spea-

kers. Connect the subwoofer to the terminals marked

FREQUENCY INDUCTOR CAPACITOR

Crossover 6dB/oct. LP (4 ohm) 6dB/oct. HP (4

ohm)

75Hz 8.0mH 530µF

100Hz 6.4mH 400µF

125Hz 5.0mH 318µF

150Hz 4.2mH 265µF

175Hz 3.6mH 227µF

Troubleshooting

Symptom Likely Cause Solution

No audio (power indicator is on) Speakers or input-signal cables dis-

connected; Check connections, source, speakers.

defective speaker or source unit

No audio (power indicator is off) No voltage at BATT or REM terminals;

Check voltage at amplifier terminals with VOM.

bad ground connection. Repair faulty connection.

No audio (power indicator is off) Amplifier protection is engaged due to

Disconnect speaker leads one at a time to

overheating; shorted or defective speaker determine which speaker or wire is

shorted or

or speaker cable. defective.

Repair the short circuit or replace bad

Specifications GTO 2000 GTO 4000 GTO 6000

Power Output max.: 400 watts 600 watts 1100 watts

RMSBridged Power Output, 4 Ohm:

220 watts 300 watts 550 watts

RMSPower Output, 2 Ohm: 2 x 110 watts 4 x 75 watts 4 x 75/2 x 125 watts

RMSPower Output, 4 Ohm: 2 x 75 watts 4 x 50 watts 4 x 50/2 x 75 watts

THD@Rated Output: 0.10% 0.10% 0.10%

SNR (A-weighted): >92dB >92dB >92dB

Frequency response: 1 0 H z - 4 0k H z 1 0 H z - 40kHz 10Hz-40kHz

Active crossover (cont. var.): 30-320Hz 30-320Hz 30-320Hz

Crossover settings: LP/HP/off LP/HP/off HP/off + LP/off

Crossover slope: 12dB 12dB 12dB

Input sensitivity: 100mV-4V 100mV-4V 100mV-4V

Bass boost: +6db@45Hz +6db@45Hz +6db@45Hz

Dimensions (L x W x H): 358 x 294 x 55 mm 358 x 294 x 55 mm 568 x 294 x 55 mm

Weight: 4 kg 4 kg 6 kg

Note: Bridging of GTO 6000

+-

Front R + L-

Rear R + L-

Sub R+ L-

Fig.1 GTO 2000

Fig.2 GTO 4000

Fig.3 GTO 6000

Notice de Montage 29/04/02 14:49 Page 3

Valutazione

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