AM-450

MIXER POWER AMPLIFIER

Owner's Manual

IMPORTANT SAFETY INSTRUCTION

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC

SHOCK DO NOT REMOVE COVER ( OR BACK)

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

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 sufficient 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 operation and maintenace (servicing) instruction in the literature accompanying the appliance.

Please see below basic protection proceeding before using:

1. Please read all the safety instruction before using the product.

2. This product must be earthed. If it should be malfunction or break down, grounding provides a path of least resistance for electric

current to reduce risk of electric shock.

This product is equipped with a cord having an equipment-grounding conductor and a grounding plug. The plug must be plugged

into an appropriate outlet that is properly installed and earthed in accordance with all local codes and ordinance.

DANGER- Improper connection of the equipment-grounding conductor can result in a risk of electric shock. Check with a qualified

electrician or serviceman if you are in doubt as to whether the product is properly grounded. Do not modify the plug provided with

the product - if it will not fit the outlet, have a proper outlet installed by a qualified electrician.

3. To reduce the risk of injury, close supervision is necessary when the product is used near children.

4. Do not use this product near water-for example, near a bathtub, washbowl, kitchen sink, in wet basement or near a swimming

pool or the lake.

5. This product may be capable of producing sound levels that cloud cause permanent hearing loss. Do not operate for a long

period of time at high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears,

you should consult an audiologist.

6. This product should be located so that its location or position does not interfere with its proper ventilation.

7. This product should be located away from heat sources such as radiators, heat registers or other products that produce heat.

8. The product should be connected to a power supply only of the type described on the operation instructions or as marked on

the product.

9. This product may be equipped with a polarized line plug (one blade wider than the other). This is a safety feature. If you are

unable to insert the plug into the outlet, contact an electrician to replace your obsolete outlet. Do not defeat the safety purpose

of the plug.

10. The power-supply cord of the product should be unplugged from the outlet when left unused for a long period of time.

When unplugging the power-supply cord, do not pull on the cord, but grasp it by the plug.

11. Care should be taken so that object do not fall and liquid are not spilled into the enclosure through opening.

12. The product should be serviced by qualified service personnel when:

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

B. Objects have been fallen, or liquid has been spilled into the product; or

C. The product has been exposed to rain; or

D. The product does not appear to operate normally or exhibits a marked change in performance; or

E. The product has been dropped or the enclosure damaged..

13. Do not attempt to service the product beyond that described in the user-maintenance instructions.

All other servicing should be referred to qualified service personnel.

14. WARNING- Do not place objects on the product's power cord or place it in a position where anyone could trip over, walk

on or roll anything over it. Do not allow the product to rest on or to be installed over power cords of any type. Improper

installations of this type create the possibility of fire hazard and/or personal injury.

SAVE THESE INSTRUCTIONS

1

Product Features

• This product adopts 24-bit high performance DSP and AD/DA, 48kHz sampling frequency of

professional digital karaoke OK amplifier.

• High-quality professional vocal effects (reverb, ECHO, reverb + echo).

• Automatic digital feedback Eliminator.

• 7 stereo digital keying the modulation.

• Automatic priority 4 sets of audio and video inputs, background music (BGM).

• Digital potentiometer adjusting parameters, operation more convenient.

• Song VOD computer interfaces, wireless infrared remote control.

• Paragraph 4 input/output digital electric meter.

• Extremely low body noise.

• 160X32 white light blue dot matrix LCD in Chinese, more intuitive.

• Output power

RMS 2×300W（8Ω） RMS 2×500W（4Ω）

SR、 SL 100W（8Ω）

2

Front Panel Review

1 2 3 4 5 6

1. Power Switch.

7

8 9 10

11 1 2

13

14

15

2. Mic effect level volume (EFFECT MASTER) knob.

3. Microphone master volume (MIC MASTER) knob.

4. Control keys. From left to right: "LOCK" lock key, "MENU" menu button, "◀" parameter

decrease key, "▶" parameter increase key, "#" music rising tone key tone sandhi,

"♮" reset button, "b" flat button.

5. LCD: 160x32 graphic Chinese display LCD used to display various parameters-adjustment

information.

6. Master volume of music (MUSIC MASTER) knob.

7. Digital potentiometer adjust effect parameters. "DELAY" echo time "REPEAT" echo

feedback, "ECHO/REV" effect mix, "REV TIME" reverberation time, "LOWPASS"

reverberation and low-pass filters.

8. Digital potentiometer adjustment effect mode.

9. Microphone balanced digital potentiometer. "LOW" frequency, "MID" low, "HIGH" high.

10. Switch the microphone feedback inhibition.

11. 3-mic input level adjust potentiometer.

12. 3-mic input jack.

13. The musical output balance (BALANCE) the digital potentiometer.

14. Music bass (BASS) digital potentiometer.

15. Music treble (TREBLE) digital potentiometer.

3

Rear Panel Review

2

3 4

5

6 7 8

1

MIC 4

INPUTS

MIC 5

SUBWOOFER OUT

REMOTE

(VOD)

RS 232

(PC)

VIDEO INPUT VIDEO OUT

RS LS

9 10 11 12 13 14 15

1. Machine safety earthing terminal.

2. Microphone, auxiliary input jack.

3. Microphone, auxiliary input jack.

4. Subwoofer output.

5. Line remote control input interface.

6. RS232 real time control of Kara OK software interface.

7. Cooling fan.

8. Direct output 120V power outlets.

9. Video input terminals.

10. Audio input level adjustment knob.

11. 4-channel audio input terminal (LD/CD,DVD,VCD,BGM).

12. The mixed audio output terminals.

13. Video output terminal.

14. The main left and right speakers out.

15. The surround channels left and right channel speaker output.

16. Fuse specification: T15A/250V.

MIXER POWER AMPLIFIER

FUSE:T15A/250V

16

4

Operation Indirection

1. Music

1-1 The audio signal (DVD,VCD) with 4 channel audio input (LD/CD,DVD,VCD, BGM)

Terminal in any way, and then adjust the audio input potentiometer to the right size. Then

turn the usic master volume (MUSIC MASTER) dial, adjust the music output volume size,

entry shown in figure as below.

MUSIC VOL : 30%

BGM ECHO 85%

Figure I

1-2 Music by adjusting the treble (TREBLE) and bass (BASS). Can modify the music part of

the frequency response curve. Adjusting range of -12dB~+12dB, steps of 1dB. Treble

default upgrade frequency is 4.00kHz, bass default upgrade frequency is 200Hz.

1-3 Adjusting the output balance (BALANCE). Counterclockwise until the LCD shows "r 0%",

represents the right channel output to a minimum. Rotate it clockwise until the LCD shows

"10%", represents the left channel output to a minimum. "LR 100%" it means that the left

and right channel outputs of the same. As shown in Figure II.

B

ALANCE

:

L

40%

#3

BGM ECHO 85%

Figure II

1-4 The music in stereo tone adjustment. Using " # ", " b ", "♮" key to music rising, will adjust

tone change and reset operations. As shown in Figure II.

5

2.Microphone Part

2-1 The microphone connected to the input jack, and adjust the corresponding input

potentiometer knob to the appropriate location. Back turning the microphone master

volume (MIC MASTER) dials, adjust the microphone output volume size. Volume rotate

effect (EFFECT MASTER) dials, adjust effects volume size. As shown in Figure III.

MIC VOL : 30%

BGM ECHO 70%

E

FF

VOL : 1 0%

BGM ECHO 70%

Figure III

2-2 Choose a vocal effect. Rotation effect mode scale digital potentiometers, increase the

ratio of the echo when rotating counterclockwise, LCD screen will show " ECHO 60% "...

" ECHO 85% " up to " Pure ECHO " effect mode, but at this time of reverberation effect

ratio is zero. When the clockwise to increase the ratio of reverberation, LCD screen

will show " Reverb 60% "... " Reverb 85% " up to " Pure Reverb " effect mode, which

echoes the proportion effect is zero. When equal proportion of ECHO and reverb, and

LCD screen will show "echo reverb" model. As shown in Figure three.

ECHO&Reverb

ECHO 60%

Reverb 60%

MIX

ECHO 85% Reverb 85%

ECHO

Reverb

ECHO REV

2-3 Adjust the effect parameters. Including the echo time (DELAY), ECHO depth (REPEAT),

reverberation time (REV TIME), reverberation and low-pass (LOWPASS) parameters.

Spin echo time respectively, ECHO depth echo effect in the effect parameter adjustment

range, respectively (0~1200) Ms, depth (0~100). Rotate the reverberation time, pre-low

pass effect reverb reverb effect parameters in its adjustment range respectively

(0.0~6.0) seconds and low-pass (8.0~16.0) kHz. As shown in figure IV.

Note: When the effects mode is "pure echo" when the LCD screen displays "echoes",

reverberation time, reverb low pass parameter adjustment failure because the current

element of reverberation effect is not. Similarly, effects mode is "pure reverb" when

the LCD screen displays "Reverb", ECHO, ECHO depth parameters fail, because when

the results did not include echo components. In addition to "pure echo" and "Reverb"

model and the rest mixed-mode adjustable reverberation and echo the arguments.

6

ECHO TIME: 170mS

BGM ECHO 70%

R

EV

TIME : 2.

4

S

BGM ECHO 70%

ECHO DEPTH: 98%

BGM ECHO 70%

R

EV

L

PF

: 8.

0KHz

BGM ECHO 70%

Figure IV

3-4 Microphones balance adjustment. Microphone part of balanced, mainly pertaining to

singing voices sound by changing the low, low, high, high frequency response curve,

beautiful singing voice, strong performance. Panel to adjust the low frequency, low

frequency and high frequency, PC software can adjust the low frequency, low frequency

and high frequency, high frequency. Paragraphs balanced adjustment range, respectively

( -9dB~+9dB), in which low frequency the default upgrade frequency is 100Hz,

improvement of low frequency in the default frequency is 400Hz, promotion of high

frequencies in the default frequency is 1.00kHz, high frequency default upgrade frequency

is 4.00kHz. As shown in Figure V.

L_

EQ GAIN

: 7

dB

BGM ECHO 70%

M_

EQ GAIN

:

9dB

BGM ECHO 70%

H

_

EQ GAIN

: 9

dB

BGM ECHO 70%

Figure V

3-5 Microphone automatic feedback suppressor. When singers sing handheld microphone for

the speaker, and often a whistle, which often makes the listener feel agitated, serious

damage when speakers. At this point you can press with a mechanical lock feedback

inhibition of the function keys, howling will be automatically eliminated, effectively protect

the speaker. When key lock when the play opened, microphone feedback inhibition of

function is cancelled. As shown in Figure VI.

MIC VOL : 30%

BGM ECHO 70%

Feedback Control Open

Figure VI

MIC VOL : 30%

BGM ECHO 70%

Feedback Control Close

7

3.Menu

3-1 This function contains some specifically Kara OK settings used on the project. Press

the menu key to switch the menu, use keys "◀" and "▶" adjust the parameters of the

current menu. Followed by operation, and switch between the different menus is

shown below.

SUB VOL : 3%

BGM ECHO 70%

SUB CUTOFF:300Hz

BGM ECHO 70%

SING SUB : 20%

BGM ECHO 70%

DISC SUB

: 3%

BGM ECHO 70%

3-2 The subwoofer has two different modes: The mode of singing and dance (Disco) mode.

Under the two menus, setting different volume. While supporting "manual" switch and

the "automatic" option.

SING/DISC MANUAL

BGM ECHO 70%

Example: Singing bass 35%, dance (Disco) subwoofer is 25%.

In the "automatic" option, the system according to the there is no microphone

signal, the test, switch to a different mode. When singers sing (the microphone

signal), the system automatically converts the volume of the subwoofer to the

preset "singing bass" sound level (35%). When the singers close the

microphone (the microphone signal), the system automatically converts the

volume of the subwoofer to "dance bass" sound level (25%). This setting is

mainly used for application in Kara OK singing and dancing conditions,

automatic switching of the subwoofer.

In the "manual" option, subwoofers must be part of the lock, system lock, press

the " SUBWOOFER " button, manually switch the " singing " and " dance " when

the subwoofer volume.

MIC SENSITIVE: 5

BGM ECHO 70%

3-3 Bass under the automatic mode switch, set the detection sensitivity of the

microphone input signal.

8

Music noise gate settings: In menu adjust music noise gate threshold adjusting range

-90dB~-24dB. This argument can effectively eliminate some minor noise

in the system, larger threshold value, eliminate noise, the more, of

course, also includes some small signals, the default value is -60dB.

MUS N_GATE:-60dB

BGM ECHO 70%

MUS DELAY: 1.0mS

BGM ECHO 70%

Music delay settings: Menu adjust music delay value adjusted in the range of 0mS~21mS.

Compensation music phase.

Music presets: In menu set the music part of the boot volume preset values. This parameter

is set to work with Kara OK volume used in engineering, when the system

boots up, always set the music volume size in the preset values, without

manual intervention each adjustment, convenient tuner work, minimum

if you want every time you turn the volume of the music, simply set the

value to 0%.

MUS INIVOL: 30%

BGM ECHO 70%

MUS MAXVOL:100%

BGM ECHO 70%

Music volume limit: In its menu sets the music volume limits. Music allows you to adjust the

maximum value of the parameter. Example: when this parameter is set

to 75%, the music volume allows you to adjust the upper limit value for

75%, when you use the dial or remote control to adjust the music volume,

maximum output volume is 75%. This parameter to 50%~100%.

By setting this parameter, so the output in a certain range, so as to

effectively protect the amplifier and speaker.

9

The music signal input selection: In the menu set the music signal input. The argument there

were 8 options in turn, LD/CD,DVD,VCD BGM,B6,B9,B12,B15.

B6,B9,V12,B15 for the priority switching of background music

choices. Steps are as follows: the background music (BGM)

connected to the audio inputs of the amplifier BGM input jack,

R

AUDIO INP : B6

CD ECHO 70%

BGM Function Audio

Connection

DVD

Set priority switch automatic background music mode, enter the audio sources firstly select BGM enter when singing sound playback, the system will automatically switch to the road (left) as shown. After when the singing stops playing the sound source,

BGM switching system based on preset time, then switch automatically to the BGM sound source. Example: when CD audio broadcast left after the system wait for 6 seconds, if the

CD no audio signal input, then automatically switches to the

BGM. B9,B12,B15 is representing automatically switches to wait 9 seconds, 12 seconds, 15 seconds.

L

R

AUDIO INP : VCD

VCD ECHO 70%

Regular Audio

Connection

Set a fixed audio source mode. First select and gain access to all the way to sing the sound sources such as (left) as shown.

And then under this menu to set the input line, for example:

VCD audio source in the left figure, the system will reset the input source between VCD way, regardless of whether the other input channels input signal. It is always fixed on the set to enter the road.

Microphone noise six settings: Under its menu to adjust the microphone noise gate's threshold

value adjusted in the range of 90DB~24DB. This argument

can effectively eliminate noise in the microphone, larger

threshold to eliminate noise, the more, of course, also includes

some small signal (the singer sang softly), the default value

is -60DB.

MIC N_GATE:-60dB

BGM ECHO 70%

10

Microphone volume presets: In menu setting the microphone part of the boot volume preset

values. This parameter is set to work with Kara OK volume used in

engineering, when the system boots up, microphone volume size

is always set at the preset value. If you want each time you power

on the receiver's volume to a minimum, you only need to set this

value to 0%, as shown left-down.

MIC INIVOL: 30%

BGM ECHO 70%

MIC MAXVOL: 100%

BGM ECHO 70%

Microphone volume limit: Set the microphone volume limit under its menus. This parameter

is the maximum microphone allows you to adjust the ... Example:

when this parameter is set to 80%, then the microphone volume

allows you to adjust the upper limit value for 80% when using dial

or remote control to adjust the microphone volume, maximum

output volume is 80%. Range for this parameter is 50%-10%.

By setting this parameter, so the output in a certain range, so as to

Effect preset volume and qualified: In the menu under settings effect the size of boot volume, and the

maximum adjustable value.

EFF INIVOL: 30%

BGM ECHO 70%

EFF MAXVOL: 100%

BGM ECHO 70%

Microphone high-throughput: Filtering out the low frequency signal of the microphone signal.

MIC HPF OFF

BGM ECHO 70%

Reset the volume: To control the volume of the microphone signal to reset the output of the

machine the size range -30DB-0DB.

CENTER VOL-10dB

BGM ECHO 70%

Reset the presets, and the volume limit: Set the central channel of the boot volume and the

maximum adjustable value.

CNT INIVOL-10 dB

BGM ECHO 70%

CNT MAXVOL- 0 dB

BGM ECHO 70%

11

Phase and surround microphone volume: Set the volume of the microphone signal output

from the surround channels and phase. Surround microphone volume

ranges from -30DB-0DB.

SUB MICVOL:-10

BGM ECHO 70%

SUB MIC PHASE:-

BGM ECHO 70%

Surround microphones balance: Set around the microphone volume the relative volume of

output from the surround left and right channels.

S.MICBAL:LR 100%

BGM ECHO 70%

Surround effect sound and direct sound: Set the microphone input signal from the road out of

the direct sound and effect sound relative to the volume size.

SUB DIRECT: 60%

BGM ECHO 70%

SUB EFFECT: 60%

BGM ECHO 70%

Surround the music volume and phase: Set the music volume and phase of the signal input

from the channel.Surround music volume ranges from -30DDB-0DB.

SUB MUSVOL: -10

BGM ECHO 70%

SUB MUS PHASE : -

BGM ECHO 70%

Surround music balanced: Set up around the music signal from around the relative volume of

S.MUSBAL : LR 100%

BGM ECHO 70%

REMOTE MODE: PreS

BGM ECHO 70%

Remote-control mode: Under the menu set remote control, calling the effects of programs,

5 mode factory setting 10 stored with the user program,

Temperature monitoring: Monitor display system in its menu the size of the temperature

value of parameter is not in this menu allows you to adjust.

Remote working: In the menu under monitor display is working properly, is not allows you to

adjust the parameters in this menu.

DEGREE: 47

BGM ECHO 70%

REMOTE : OK

BGM ECHO 70%

12

The Lock Operation: Long press the "LOCK" lock keys, LCD screen will prompt for a password

(as shown in Figure VII). Press the "◀ " and "▶" keys to change the cursor

indicates the character, press the "♮" key in order from left to right to move the

cursor's position. Password input has been completed, press the "MENU" button

to enter the next step. The screen you will be prompted to enter the password

again, repeat the above steps until after you have entered again, long press the

" LOCK " key, and enter the same password twice before and after, will be locked

out of the system, while in the lower left of the LCD screen displays "lock" icon.

Similarly, operation is the same. Follow the above steps, input password and click

" LOCK " keys to unlock the password entered is normal, in the lower left of the

LCD screen the "lock" icon will disappear.

Enter Password

[ * ** * ]

Confirm Password

[ * *** ]

MIC VOL : 30%

BGM ECHO 70%

MIC VOL : 30%

BGM ECHO 70%

Lock

Unlock

Figure VII

Note: After performing a lock operation, the system according to the different types of locks set

by the user, the corresponding parameters are locked, such as (delay time delay depth

effect, reverberation time, reverb low pass, three balanced microphone, balance, high

and low sounds and switching feedback inhibition of the music, and the regulation of tone

sandhi) and so on.

Details please refer to the help section of the software of computer control.

Note: Added automatic locking function of the machine, do not adjust in one minute after the

small boot encoder, Encoder automatically locks after locked small encoder does not

rotate, press the "MENU" menu button to unlock, the encoder can rotate, if you do not

need this feature, can cancel the automatic locking computer interface software device

menu, system reset, automatic locking function effectively.

13

4.Wireless Remote Control

Easy to use remote control, eliminating the manual operation. Simple parameters, enable you to easily and quickly adjust parameter settings. As shown in the figure eight.

Effect Level

Effect

Key Control

Music Vol

Mic Vol

Remote Code

Switch

Grounding

+5V

Line Control

Ueser Code: B2,4d

EFFECT

7 8 3 8 B 8

B4

0 8

B3

F 0

B2

#4

1 0

#3

9 0

#2

7 0

30 5 0

B1

#1

B0 D 0

6 0 2 0 4 0

ECHO MIC MUSIC

E 0 A 0 C0

14

Technical Specification

Output Power(RMS) .........................................................

RMS 2x300W(8Ω) RMS 2x500W(4Ω)

SR, SL 100W(8Ω)

SNR ...................................................

Music Processing, Above 95DB(Pass Through, Tone off)

MIC Processing, Above 50DB(Effect Open)

THD ......................................

0.3% 20Hz-20kHz, 2-Channel 2x100W(RMS) Out (Pass Through)

Frenquecy Response ......................................................................................

20Hz-20kHz ±1dB

Input Sensitivity/Impdance

MIC ..............................................................................................................

0.5mV-100mV/2kΩ

Line ....................................................................................................................

0.707Vpp/10kΩ

Video .........................................................................................................................

1Vpp/47kΩ

Tone Control

Music

Treble(increase / attenuation) .....................................................................

±12dB, Step±1dB

Bass(increase / attenuation) .......................................................................

±12dB, Step±1dB

MIC

Treble(increase / attenuation) .......................................................................

±9dB, Step±1dB

Bass(increase / attenuation) .........................................................................

±9dB, Step±1dB

Modulating ..........................................................................................

±7Grade, Step100 Cent

Output sensitivity/impedance

Audio(Mix Output) .....................................................................................................

3.2V/4.7kΩ

Video .........................................................................................................................

1Vpp/320Ω

With short circuit protection function ..................................................................................

4-8Ω

Recommended Impedance ...................................................................................................

8Ω

Power Supply .............................................................................

AC 200V-240V/50Hz Selectable

Fuse ..............................................................................................................................

T15A/250V

Stardard Power .......................................................................................................

AC 120V/50Hz

Power ....................................................................................................................................

800W

AC Power Outlet

Switching a set of ..............................................................................................................

200W

No switching groups ..........................................................................................................

300W

Weight .....................................................................................................................................

17kg

Dimension .................................................................................................... 510×430×190(mm)

15