Jensen JXP720 Manuel du propriétaire

JXP720

JXP460

JXP340

JENSEN”

Amplifier Installation and Operation

Introduction

Thank you for purchasing a Jensen amplifier. The JXP series

amplifiers offer extreme value and performance. Proper

installation is essential for optimal performance and long-term

reliability. Please read through this manual first to familiarize

yourself with your amplifier and its functions.

Warranty Service

If your Jensen amplifier should ever require service, you will

need to have the original dated receipt. If you ever need to

return the unit for any reason, always include the receipt with the

product.

1.800.323.0221

www.jensen.com

JENSEN

JXP720, JXP460, JXP340

Contents

Features ........m.............................*.. 3

Installation ..................................... 3

Before You Begin ......................................... 3

Disconnect Battery ........................................ 3

Supplies and Tools Needed .......................... 3

Location and Mounting ................................. .4

Routing Wires ................................................ 4

Wiring ............................................. 5

Power ............................................................ 5

Power Terminal (+I 2V) ................................. 5

Ground Terminal (GND) ................................ 5

Remote Terminal (REM) ............................... 5

Fuses ............................................................ 5

Inputs, RCA Output,

Remote Level Control ................................. 6

Input Wiring ................................................... 6

Connecting Other Amps ................................ 6

Remote Level Control (JXP720) ...................7

Speaker Wiring Options ............................. 7

Indicators and Controls .............................. 9

Control Panel Access .................................... 9

Crossover (X-OVER) .................................... 9

Power/Protect Light..................................... IO

Bass ............................................................ 10

Level............................................................ 10

Testing

n n n n n n n n n n n n n n n n n n n n n n n n nn n n n n n nn n n n n n n n n IO

Reconnect Battery ...................................... IO

Test Power Wiring ....................................... IO

Test Speaker Connections ..........................

Troubleshooting

n n n n n n n n n n n n n n n n n n n n n n n n n n n

Specifications

n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n

Warranty

mmmmmmmmmmmmmmmmmmmmmmmmmmm~mmmmmmmmmm

JXP720, JXP460, JXP340

JENSEN

JXP Series 2-channel amplifiers include:

e Easy access top mounted controls

0 Continuously variable high pass/low pass

crossover

0 40Hz - 400Hz crossover frequency range

e Crossover mode selector switch

0 Continuously variable bass boost, centered

at 45Hz

0 input level control

e Remote level control (JXP720)

Traditional input circuitry - low and high level

inputs

Pre-amp output for installation flexibility

Dual status LED diagnostic indicator

Thermal, short circuit and low impedance

protection circuitry

PWM MOSFET power supply

Discrete amplifier design with complementary

high current Bi-polar output stage

Installation

Before You Begin

Before you begin, you will need tools, supplies

and adapters. It is best to make sure you have

everything you need before you start.

Disconnect Battery

Before you begin, always

disconnect the battery

negative terminal.

Supplies and Tools Needed

Supplies

Black electrical tape

Amplifier Installation Kit

Tools

Cordless drill with assortment of bits

Flat and Phillips screwdrivers

Wire cutters/strippers

Crimping tool

12-volt test light or digital multimeter

e Wire brush, sandpaper or scraping tool

(ground connection to vehicle should be a

clean, unpainted metal surface)

JENSEN

JXP720, JXP460, JXP340

Location and Mountina Routina Wires

The JXP amplifier’s compact design allows

greater flexibility in mounting. It can be

mounted under a seat or in the trunk.

When selecting a location, remember that

amplifiers generate heat. Select a location

where air can circulate around the amplifier.

Do not cover the amplifier with carpets or

enclose it behind interior trim panels. Do not

mount the amplifier in an inverted or upside

down configuration. Every installation will be

a bit different based upon vehicle design.

Check all locations and placements carefully

before making any cuts or connections.

Important

Allow air circulation around the amplifier.

Battery

Fuse or

Circuit

Breaker Grommet

_ To prevent

damage to

power wire

Power Wire

’ Ground Screw

Drill i/8” hole in

chassis sheet metal

Use the same ground if

using multiple amplifiers

important

If wiring connections are made wrong, the unit

will not operate proper/y and it could be

damaged. Follow the installation instructions

carefully, or have the installation handled by

an experienced technician.

JXP720, JXP460, JXP340

JENSEN

Wiring

Power

Power Terminal (+12V)

Connect directly to the vehicle battery+

terminal.

Fuse

GND REM + IN

JXP720 60 AMP

JXP460 30 AMP /Bi

JXP340 25 AMP Spade

Connector

-----------1

Power Wire*

------------

*Power Wire (minimum)

JXP720 8 gauge

JXP460 10 gauge

JXP340 10 gauge

Ground Terminal (GND)

Connect to a good chassis ground. The ground

connection should be to clean, unpainted metal

to provide a good electrical connection.

-3

Sheet Metal

v Screw

GND REM + 18

Drill l/8” hole

in chassis

sheet

metal

Remote Terminal (REM)

Connect the power antenna/amplifier

turn-on

lead from the receiver to the AMPLIFIER

REMOTE terminal.

GND

To Receiver

Power

Antenna Lead

Wire-

Fuses

25A

Use only blade-type fuses.

Fuse

JXP720 2 X 30 AMP

JXP460 30 AMP

IFUSE

JXP340 25 AMP

JENSEN

JXP720, JXP460, JXP340

Inputs, RCA Output, Remote Level Control

JXP720

3 /’ ’

INPUT

L R

REMOTE HI LtVEL OUTPlJl c

$j)

@@g

L R

J -

JXP460

JXP340

Input Wiring

Low Level Input (RCA Input)

Low level (RCA) input is preferred for best

performance. Most trunk/hatchback installations

will require a E-20 foot RCA cable. While pick-

up trucks and under-seat mounting will require

a 6-12 foot RCA cable. Connect an RCA cable

from your receiver to the RCA input on your

amplifier.

L R

Radio L R

+- - +

High Level Input

High level input should be used when an RCA

output is not available from the receiver.

Connect the speaker outputs from the receiver

to the high level input connector.

White = Left (+)

White/Black

Left (-)

Gray

Right (+)

Low Level or Hi Level

Gray/Black

Right (-)

Black (ground)

Important

Only connect the low (RCA) or high level input.

Do not use both at the same time.

Connecting other Amps

OUTPUT

RCA Output

The “output” signal allows you to

L R

conveniently connect other

amplifiers to each other.

JXP720, JXP460, JXP340

JENSEN

Remote Level Control (JXP720)

REM01

BASS

Remote level control allows the input level to

be adjusted from an alternate location. It can

be mounted under-dash or in-dash.

When the amplifier is used to drive

subwoofers, and the low pass crossover is

activated, the remote level control can be

used as a “remote bass level control”. This

enables you to control the bass level,

independent from the rest of the system. This

is convenient for system tuning and/or when

playing many different types of music.

Speaker Wiring Options

2 Speakers

ml ml

4”--l Or ~“----I

IIPF FIJImL LPF HPF FULL LPF

r---- BRIDGE 1

RO R- LO L+

I 1

2cl

minimum

2 Subwoofers 1

+“----I

HPF FULL LPF

2Ll

minimum

JENSEN

JXP720, JXP460, JXP340

TrimMode

+“--I

HPF FULL LPF

I BRIDGE 1

RO R- LO L+

important

2Q minimum

4R minimum

When running a subwoofer and two full-range

speakers together (Tri-mode operation), high

and low pass filters must be used. Failure to

install these filters may damage your amp and/

or speakers.

Bridged Subwoofer

HPF FULL LPF

j--- BRIDGE 1

RO R- LO L-t

IH2I

Freq. Speaker Impedance

HZ 2 OHMS 4 OHMS4 OHMS

8 OHMS8 OHMS

L C LL CC

LL CC

80 4.1 mH 1OOOpF 8.2mH

8.2mH 5OOpF5OOpF 15mH

15mH 25OpF25OpF

100 3.1 mH 8OOpF 6.2mH6.2mH 4OOpF4OOpF 12mH12mH

t---

2OOpF2OOpF

130 2.4mH 6OOpF 4.7mH4.7mH 3OOpF3OOpF IOmH 15OpF

200 1.6mH 4OOpF 3.3mH3.3mH 2OOpF2OOpF 6.8mH6.8mH 1OOpF1OOpF

250 1.2mH 3OOpF 2.4mH2.4mH 15Oj.~F15Oji

4.7mH4.7mH

75pF75pF

400 .8mH 2OOpF 1.6mH1.6mH 1OOwF1OOpF 3.3mH 5OyF

1 IOmH 15Or,rF

1 3.3mH 5ObF

600 .5mH 136pF 1.OmH 68pF 2.OmH 33pF

800 .41 mH 1OOpF .82mH 50& 1.6mH 26pF

1000 .31 mH 78pF .62mH 39pF 1.2mH 20pF

1200 .25mH 66pF .51 mH 33pF 1.OmH 16pF

- ~---~

1800 .16mH 44pF .33mH 22pF .68mH 1OpF

4000 .08mH 2OpF .16mH IO& .33mH w

JXP720, JXP460, JXP340

JENSEN

Indicators and Controls

JXP720 JXP460, JXP340

POWER

‘-“‘--I

PROTECT

HPF FULL LPF

LEVEL R-CHX L-CHX BASS

2~4 605 6Q5 0

8V 3V 40Hz 400Hz 40Hz 400Hz OdB 6dB

Control Panel Access

1. Turn thumbscrew counterclockwise to

remove.

2. Gently push down on thumbscrew to lift the

front edge of the control door.

3. bift and remove control door.

NOftX

An optional Al/en-head screw (with wrench) is

included and can be used in place of the

thumbscrew.

Crossover (X-OVER)

Adjust the crossover to accommodate your

chosen installation method.

LPF-(low pass filter) Select

this filter when the amplifier will

be driving woofers or

subwoofers.

FULL-Crossover is not active,

i-“L, amplifier is in “full range”

HPF FULL LPF

mode.

0 HPF-(high pass filter) Select

this filter when the amplifier will

be driving full range/separate

speakers, and you want to limit

the “bass” going to these

speakers.

Tri-mode/Three channel operation

L-CHX

60 125

An amplifier is usually configured

for tri-mode operation when you

want to use one amplifier to drive

JOHr 400Hr

a pair of front speakers and

R-CHX

subwoofer( In other words,

60 125

when you want to drive a

complete system with one amp.

Your Jensen amplifier is capable

40Hz 400Hz

of tri-mode operation.

Important

Tri-mode operation requires using ‘passive

crossovers”. These crossovers are available

at your local retailer or install shop. Failure to

install these filters may damage your

amplifier and/or your speakers.

See Page 8.

JENSEN

JXP720, JXP460, JXP340

Power/Protect Light Level

POWER

A dual status LED indicator illuminates

PROTECT

red or green to indicate the status of

the amplifier.

Green - Power applied, ON

Red - Protection circuit activated,

STANDBY

Bass

BASS BASS

BASS

increases the

3Q 0 volume of the bass at

45Hz by up to 6-12 db.

OdB 12dB

JXP720

OdB 6dB

Use very carefully!

JXP460

JXP340

LEVEL

The input level control matches the

output of your radio to the input of

the amplifier. After the installation is

8V 3v

complete, make sure the input level

control on the amp is turned down

all the way (counterclockwise or all the way to

the left). Play a tape or CD (make sure bass

and treble settings or EQ are flat too) and

turn the volume up slowly until you just start

to hear distortion. Now back the volume down

just a bit. On the amp, slowly turn up the input

level control (clockwise or to the right) until

you just start to hear distortion and back it

down a bit. Now your radio and amplifier

levels are matched.

Testing

Before you finish the installation, you should do the following tests to make sure the wiring is correct

and everything is operating properly.

Reconnect Battery

When wiring is complete,

reconnect the battery

negative terminal.

Test Power Wiring

1. Turn on the receiver but do not turn up

the volume. The amplifier power light

should come on. If not, check the

REM and +12V wires.

2. Turn up the receiver volume slightly. All

speakers should operate. If not, check

wiring connections at amplifier and

speakers.

Test Speaker Connections

These tests make sure the speakers are

connected right. If speakers don’t play at all,

one (or both) speaker wires may be

disconnected. If the wrong speaker plays (you

hear left speaker when you expect right

speaker) make sure you connected the wires

correctly.

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