Audio 2000 AKJ7403 Manuel utilisateur

AKJ7403

OWNER’S MANUAL

AK 7403 PRO FE SSIN AL AAOKE MI XI NG AM PL IF ER WI TH D IG TAL EC HO,KEY,AND FEE D AC K CONT R LS

JO K R I I B O

AUTO

PROF. KARAOKE MIXING AMPLIFER WITH DIGITAL

ECHO, KEY, AND FEEDBACK CONTROLS

Thank you for purchasing the Audio2000'S professional karaoke mixing amplifier

with digital echo, key, and feedback controls! To achieve maximum performance

from your new unit, please read this manual thoroughly, and retain it for future

reference. For more information, please visit our website (www.audio2000s.com).

4ACC703 -1

WARNING AND SAFETY INSTRUCTION.......................................

FEATURES ................................................................................

HANDLING PRECAUTIONS ........................................................

BEFORE CONNECTIONS ............................................................

DESCRIPTIONS AND FUNCTIONS

● FRONT PANEL ......................................................................

● REAR PANEL .........................................................................

SPEAKERS CONNECTIONS ........................................................

SYSTEM CONNECTIONS ...........................................................

PRINCIPLE OF AUDIO VIDEO SWITCHOVER ..........................

GENERAL OPERATION .............................................................

REMOTE CONTROL UNIT .........................................................

SAFETY PRECAUTIONS ............................................................

MAINTENANCE .......................................................................

TROUBLESHOOTING ...............................................................

ETIQUETTE OF SOUND ............................................................

SPECIFICATIONS .....................................................................

IMPORTANT

For your protection,please read these instructions completely, and keep

this manual for future reference.

Carefully observe and comply with all warnings,cautions,and instructions

placed on the equipment or described in the operations instructions to

guard against injury.

TABLE CONTENTS:

1-2

4-5

6-7

The lightning flash with arrowhead symbol,within

an equilateral triangle,is intended to alert the user

to the presence of uninsulated "dangerous voltage"

within the product's enclosure that may be of suffi-

cient magnitude to constitute a risk of electric shock

to persons.

The exclamation point within an equilateral triangle

is intended to alert the user to the presence of

important operating and maintenance (servicing)

instructions in the literature accompanying the

appliance

CAUTION:TO PREVENT ELECTRIC SHOCK,MATCH WIDE

BL ADE OF PLUG TO WIDE SLOT, FULLY INSERT.

ATTENTION:POUR EVlTER LES CHOCS ELECTRIQUES

INTRODUlRE L A L AME L A PLUS LARGE DE L A FICHE DANS

L A BORNE CORRESPON-DANTE DE LA PRISE ET POUSSER

JUSQU'AU FOND.

CAUTION:TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK)

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE

This product was designed and manufactured to meet

strict quality and safety standards. There are, however,

some installation and operation precautions which

you should be particularly aware of.

1) Read Instructions--All the safety and operating

instructions should be read before the appliance

is operated.

2) Retain Instructions--The safety and operating ins-

tructions should be retained for future reference.

3) Heed Warnings--All warnings on the appliance

and in the operating instructions should be

adhered to.

4) Follow Instructions--All operating and use instr-

uctions should be followed.

5) Water and Moisture--The appliance should not

be used near water -- for example, near a bathtub,

wash-bowl.Kitchen sink, laundry tub, in a wet

basement, or near a swimming pool, etc.

6) Carts and Stands--The appliance should be used

only with a cart or stand that is recommended by

the manufacturer.

7) An appliance and cart combination should be

moved with care. Quick stops, excessive force,

and uneven surfaces may cause the appliance

and cart combination to overturn.

8) Wall or Ceiling Mounting--The appliance should

be mounted to a wall or ceiling only as recom-

mended by the manufacturer

9.Ventilation--The appliance should be situated so

that its location or position does not interfere with

its proper ventilation. For example, the appliance

should not be situated on a bed, sofa,rug,or similar

surface that may block the ventilation openings;or,

placed in a built-in installation,such as a bookcase

or cabinet that may impede the flow of air through

the ventilation openings.

10) Heat--The appliance should be situated away

from heat sources such as radiators,heat

registers,stoves,or other appliances(including

amplifiers)that produce heat.

11) Power Sources--The appliance should be con-

nected to a power supply only of the type des-

cribed in the operating instructions or as mar-

ked on the appliance.

12) Grounding or Polarization-The precautions that

should be taken so that the grounding or pola-

rization means of an appliance is not defeated.

13) Power-Cord Protection-Power-supply cords sh-

ould be routed so that they are not likely to be

walked on or pinched by items placed upon or

against them,paying particular attention to co-

rds at plugs,convenience receptacles,and the

point where they exit from the appliance.

14) Cleaning-The appliance should be cleaned on-

ly as recommended by the manufacturer.

15) Power Lines-An outdoor antenna should be lo-

cated away from power lines.

16) Nonuse Periods-The power cord of the applia-

nce should be unplugged from the outlet when

left unused for a long period of time.

17) Object and liquid Entry-Care should be taken

so that objects do not fall and liquids are not

spilled into the enclosure through openings.

18) Damage Requiring Service-The appliance sho-

uld be serviced by qualified service personnel

when;

A.The power-supply cord or the plug has been

damaged;or

B.Objects have fallen,or liquid has spilled into

the appliance;or

C.The appliance has been exposed to rain;or

D.The appliance does not appear to operate

normally or exhibits a marked change in

performance;or

E.The appliance has been dropped,or the

enclosure damaged.

19) Servicing-The user should not attempt to service

the appliance beyond that described in the op-

erating instructions. AII other servicing should

be referred to qualified service personnel.

READ BEFORE OPERATING EQUIPMENT

SAFETY INSTRUCTIONS

FEATURES

Do not install the unit in following places:

In a place which is exposed to direct sunlight or near

a source of heat such as a radiator.

In a place where the heat cannot escape due to poor

ventilation, or where it is very humid or dusty.

In an unstable place with excessive vibrations or

sloping.

In a place which may be exposed to rain, such as

near a window.

In a place which may be exposed to soot, vapor or

heat, such as near a cooking stove.

Connection precautions

Be sure to switch off the powers of the related

equipment before making any connection.

The "White" input/output jacks of the amplifier are

designed for the Left channel, while the "Red' jacks

are for the Right channel. Be sure to connect the

cords without mistaking the correspondences of the

Left and Right channels.

Insert the plugs of the connection cords securely into

the jacks. If the connection is incomplete, sound may

not be produced or noise may be generated.

When unplugging the power cord from the power

outlet, be sure to grasp the plastic molding of the

plug and pull.

Power consumption of AC power outlets

Be careful that the total power consumption does not

exceed the wattage marked on the rear panel. Do not

connect other appliances than the system

components to the power outlets of this unit.

Do not connect a TV set to this unit, even if the power

consumption value marked on a TV set is below the

permissible limit of this unit. A larger current than the

permissible value may flow when the TV power is

turned on.

HANDLING PRECAUTIONS

BEFORE CONNECTIONS

FEATURES

1. High Quality Dual Digital Echo Effects with Individual Treble/Mid/Bass Controls.

2. Five Microphone Inputs (Three at the Front Panel, Two at the Rear Panel).

3. Three Individual Microphone Volume Controls (1, 2/A, and 3/B).

4. Master Microphone Volume/Treble/Mid/Bass Controls.

5. Master Music Volume/Treble/Mid/Bass Controls.

6. Feedback Frequency and Gain Controls.

7. Four Audio Inputs with Automatic or Manual Audio Channel Selections.

8. 13-Step Digital Key Changer.

9. Digital Echo Volume/Repeat/Delay/Bass/Mid/Treble Controls.

10. Remote Control.

11. Stereo Headphone Output.

12. Mono Microphone Effect Input/Output.

13. Stereo Music Effect Inputs/Outputs.

14. Four Video Inputs and Four Video Outputs.

15. Audio Input Level Adjustment.

16. Max. Power Output: 600W + 600W @ 8 Ohms.

POWER

Press this button to turn the power on. Press this

button again to turn the power off.

MUSIC TONE (BA SS/MID/TREBLE) CONTROLS

These controls are used to boost or cut the low,

mid and high frequency responses.

MICROPHONE TONE (BASS/MID/TREBLE)

CONTROLS

These controls are used to boost or cut the low,

mid and high frequency responses of

microphones 1, 2, 3, A, and B.

ECHO DEL AY/REPEAT CONTROLS

Adjust the parameters of the echo effect with these

controls as desired.

DELAY Control: Adjust the time duration between

each echo sound.

REPEAT Control: Adjust how many times the echo

sound is to be repeated.

INDIVIDUAL MICROPHONE VOLUME

CONTROLS (1, 2/A, 3/B)

1: This control knob adjusts the microphone input

level from the MIC INPUT 1 jack (front panel).

2/A: This control knob adjusts the microphone

input level from the MIC INPUT 2 jack (front

panel) and the MIC INPUT A jack (rear panel).

3/B: This control knob adjusts the microphone

input level from the MIC INPUT 3 jack (front

panel) and the MIC INPUT B jack (rear panel).

Normally, set these control knobs to the center

positions.

MICROPHONE INPUT JACKS (1,2 ,3)

These jacks are for connecting microphones.

AKJ7 403 P RO FES SI ONAL KARA OK E MIXIN G AM PLI FI ER W ITH D IG ITA L EC HO,K EY,AND FEED BA CK CO NT RO LS

AUTO

ECHO TONE BASS/MID/

TREBLE CONTROLS

POWER

INDIVIDUAL

MICROPHONE

VOLUME CONTROLS

MICROPHONE TONE

CONTROLS

MUSIC TONE

CONTROLS

ECHO DELAY/

REPEAT CONTROLS

MIC INPUT

JACKS

FB CONTROL GAIN

ADJUSTMENT

VFD DISPL AY

PANEL

FB CONTROL FREQ

ADJUSTMENT

MUSIC VOLUME

CONTROL

16 STEREO

HEADPHONE

OUTPUT JACK

INPUT SELECTION

BUTTONS

KEY CONTROL

BUTTONS

ECHO VOLUME

CONTROL

MASTER MIC

VOLUME CONTROL

AUTO/MANUAL

INDICATOR

18 REMOTE

CONTROL

SENSOR

DESCRIPTIONS AND FUNCTIONS

MUSIC VOLUME CONTROL

This control knob allows the user to adjust the

volume of the music output.

MA STER MICROPHONE VOLUME CONTROL

This control knob adjusts the overall volume of

all microphones.

ECHO VOLUME CONTROL

This control knob adjusts the volume of the

microphone echo effect.

VFD DISPL AY PANEL

This panel display all input information and

key control information.

FEEDBACK CONTROL FREQUENCY

ADJUSTMENT (FREQ)

When the use of microphones causes feedback

(howling) results, turning the frequency

adjustment knob to match the feedback control

frequency to the howling frequency. The

feedback control frequency range is from

80Hz to 7.5KHz.

FEEDBACK CONTROL GAIN ADJUSTMENT

(GAIN)

When the use of microphones causes feedback

(howling) results, turning the gain adjustment

knob to adjust the amplitude (gain) of the

howling frequency. The feedback control gain

can be adjusted between -12dB and +12dB.

KEY CONTROL BUTTONS

b : Lowers the music key one step (each step is

1/4 note) each time this button is pressed.

: Resets the music key to its natural key.

# : Raises the music key one step (each step is 1/4

note) each time this button is pressed.

Note:The key will stay until it is changed further.

ECHO TONE (BASS/MID/TREBLE) CONTROLS

These controls are used to boost or cut the low, mid

and high frequency responses of the echo sound.

STEREO HEADPHONE OUTPUT JACK

Connecting headphones to this jack will have the

speaker output jacks deactivated. This jack is used

when privacy is desired.

AUTO / MANUAL INDICATOR

This is to indicate the status of the AUTO ON OFF

switch on the rear panel. When the AUTO ON OFF

switch is set to ON, the LED indicator will be turned on.

When the AUTO ON OFF switch is set to OFF, the

LED indicator will be turned off.

REMOTE CONTROL SENSOR

The infrared control signal from the remote control

commander is to be received through this sensor.

INPUT SELECTION BUTTONS

These buttons can be manually set only

when the AUTO ON OFF switch on the

rear panel is set to OFF.

When used, press any of these buttons to

select the desired music input source.

DESCRIPTIONS AND FUNCTIONS

PRE-OUT

COOLING FAN

FUSE TERMINAL

MUSIC EFFECT INPUT/

OUTPUT JACKS

INPUT LEVEL

AUX

VCD

DVD

BGM

SPEAKER OUTPUT

TERMINALS

REMOTE IN

VIDEO OUTPUT

JACKS(1,2,3,4)

MIC INPUT

JACKS(A,B)

DVD

Connect the output jacks of the DVD player

to these jacks.

VCD

Connect the output jacks of the VCD player

to these jacks.

AUX

Connect the audio output of any auxiliary

component, such as a cable broadcasting

tuner, to these jacks.

BGM

Connect the output jacks of the BGM

(background music) player to these jacks.

230V 11 5V230V 11 5V

Voltage Sel ec tor

AC IN

115V/230V

50Hz/60Hz

Se r ia l N um b er

Mad e in P.R. C.

PRE- OU T

OUT

MIC EF FE CT

MIC EFFECT INPUT/

OUTPUT JACKS

VOLTAGE

SELECTOR

VIDEO INPUT JACKS

(DVD,VCD,AUX,BGM)

DESCRIPTIONS AND FUNCTIONS

AC OUT

AC POWER CORD

AUTO ON OFF

SWITCH

INPUT LEVEL

Turn this input level control to adjust the input

level. Turn the input level control counter-

clockwise to reduce the input level. Turn the input

level control clockwise to raise the input level.

MUSIC EFFECT INPUT/OUTPUT JACKS

The EFFECT allows the AKJ7403 user to add any

sound effecter, such as an equalizer, as a part of

the music loop in the AKJ7403 unit. If a sound

effecter is not used, check to make sure that two

U-shaped connectors are connected from the IN

jacks to the OUT jacks. The first U-shaped

connector is to be connected from the white IN

jack to the white OUT jack. The second U-shaped

connector is to be connected from the red IN jack

to the red OUT jack. If a sound effecter is to be

placed in between the IN jacks and the OUT jacks,

the U-shaped connectors need to be removed from

the unit and make sure that these U-shaped

connectors are taped to the bottom of this unit for

future use. The IN jacks are to be connected to the

input ports of the sound effecter and the output

ports of the sound effecter are to be connected to

the OUT jacks.

PRE- OUT

The pre-amplifier audio output (PRE-OUT) can be

connected to an external power amplifier if needed.

COOLING FAN

SPEAKER OUTPUT TERMINALS

Banana jacks are used as the speaker output

terminals. The overall effective impedance of the

speaker sets to each side (left or right side) of the

speaker terminals needs to be within the range of

4Ω to 16Ω. (Caution: If two sets of 8Ω speakers

are connected to one set of speaker terminal, the

effective impedance of these two speakers will be

4Ω, just half of its original impedance.)

FUSE

Please turn off the AC power and unplug the AC

cord before replacing the fuse (ONLY replacing

with the same type and rating of fuse).

AC OUT

SWITCHED 200W: This AC outlet is controlled by

the main power button.

UNSWITCHED 200W: This AC outlet is not controlled

by the main power button.

NOTE 1: Do NOT connect any of these AC power

outlets to any device or combination of

devices, which may consume more than

200W of power.

NOTE 2: Please refer to the Power Consumption of

AC Power Outlets part on page 3.

AUTO ON OFF SWITCH

When this AUTO ON OFF switch is set to ON, the

audio/video input source will be automatically

switched to any audio/video input source with

signals. The priority of determining which audio/

video input source with signals to be selected is as

follows: video > audio and DVD>VCD>AUX>BGM.

When the AUTO ON OFF switch is set to OFF, the

audio/video input source needs to be selected

manually by pressing any of the input selection

buttons. The initial input source selection after

the power is turned on is the DVD input.

VIDEO OUTPUT JACKS (1, 2, 3, 4)

These video output jacks are to be connected to

TV monitors.

MICROPHONE INPUT JACKS (MIC A AND MIC B)

These microphone input jacks are to be connected

to microphones. The MIC A jack is common to the

MIC 2 jack on the front panel. The MIC B jack is

common to the MIC 3 jack on the front panel.

MIC EFFECT INPUT/OUTPUT JACKS

The MIC EFFECT allows the AKJ7403 user to add

any sound effecter, such as an equalizer, as a part

of the microphone loop in the AKJ7403 unit. If a

sound effecter is not used, check to make sure that

the U-shaped connector is connected from the IN

jack to the OUT jack. If a sound effecter is to be

placed in between the IN jack and the OUT jack,

the U-shaped connector needs to be removed from

the unit and make sure that the U-shaped connector

is taped to the bottom of this unit for future use.

The IN jack is to be connected to the input port of the

sound effecter and the output port of the sound

effecter is to be connected to the OUT jack.

VOLTAGE SELECTOR

Check to make sure the AC Voltage Selector switch is

set to the proper voltage for your area (120V/60Hz

for the North America Area) before plugging in the

AC cord to the AC power outlet.

CAUTION: UNPLUG THE AC CORD FROM THE AC

POWER OUTLET BEFORE RESETTING THE AC

VOLTAGE SELECTOR SWITCH.

AC POWER CORD

Plug this cord into an AC wall outlet.

REMOTE IN

This jack is used to connect to an external remote

control sensor. When an external remote control

sensor is used, the remote sensor on the front

panel is deactivated.

VIDEO INPUT JACKS (DVD, VCD, AUX, BGM)

These video input jacks are to be connected to a

DVD player, a VCD player, or other video units.

DESCRIPTIONS AND FUNCTIONS

Connection of Speaker Cables

Insert the banana connectors on the speaker

cables into the banana speaker jacks on the

AKJ7403 rear panel. Please refer to the

following pictures.

Right speaker Left speaker

Connecting the RCA Cables

When connecting the RCA cables to the RCA jacks,

be sure to insert the red RCA plug into the red RCA

jack and the white or black RCA plug into the white

RCA jack.

Caution:

Turn off the AKJ7403 power when connecting the speaker cables to the speaker

output terminals on the AKJ7403. Before turning on the AKJ7403, make sure that any

metal part or copper wire of one speaker cable is NOT IN CONTACT with any metal

part or copper wire of another speaker cable.

Use speakers with the impedance of 4 Ω to 16 Ω.

If two sets of speakers are connected to any one speaker output terminal on the

AKJ7403, each speaker must have its impedance higher than 8 . Connecting

two 8 speakers to a speaker output terminal is the same as connecting a 4

speaker to the speaker output terminal. If any of the speaker output terminals is

connected to a speaker or a speaker set with impedance lower than 4 , the

protection circuitry in the AKJ7403 will be activated and the stereo performance

will be abnormal.

Ω Ω

White

Left

Right

White or Black

Red Red

SPEAKER CONNECTIONS

(+)Cord to (+) terminal

(-) cord to (-) terminal

Red

Black

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