User’sManual...This manual start to be use when the Stereo Pre-amplifier MK6906/MK6920 development...

Professional Audio System

Stereo Pre-amplifier

MK6906

MK6920

MK6925

电源

7 BAND EQUALIZER FOR MIC

+12dB

0dB

-12dB

64Hz 160Hz 400Hz 1KHz 2.5KHz 6.4KHz 15KHz

BALANCETREBLEBASS

MP3 DISPLAY MP3

MIC 4

PROT108642

AUX

MIC 1 MIC 2 MIC 3 AUX VOL

L

RMP3

AUX1

AUX2

AUX3

POWER

+

MAIN VOL

DELAYECHO REPEATMIC 2MIC 1

MIC

Stereo Pre-amplifier MK6906

User’s ManualFor the better application of this equipment, please read the operation instruction carefully prior to use.

Guangzhou DSPPA Aud io Co . , Ltd .www.dsppa t e ch . com

http://www.dsppatech.com

About this ManualThis manual start to be use when the Stereo Pre-amplifier MK6906/MK6920 development iscompleted, the manual contains the micro-intelligent MK6906/MK6920 equipment systemintroduction, the use of precautions, system connection instructions, product use instructions and manyother contents. Please read this manual carefully before connecting and installing. And follow theinstructions in the instructions to operate.

A description of this logo on the rear panel of the machine is a matter that must be noted. Be sure touse or follow these instructions when using it

WarningIn order to prevent damage to users, others, equipment damage, or property loss, be sure to observe the

following basic precautions:

■ Please make sure that thepower wire is NOT damaged.Do NOT unplug the equipmentby pulling the power wire;otherwise it may cause electricshock, short circuit or fire.

■ When the equipment is in use, DO NOT block the airoutlet which should be kept clear, in order to avoidoverheat.

■Do NOT store thisequipment in anyplace with heavydust or vibration, orwhere it is extremelycold or hot.

■ Please do NOT place any heavy article on thisequipment. Please operateswitches, buttons orexternal audio sourcecarefully.

■ Please prevent foreign matters (such as paper,metal etc.) entering the equipment through the gapsor opening, in such cases, please cut off the powersupplyimmediately.

■ Do NOT attempt to remove any internal componentfrom the equipment, or tomodify the equipment inwhatever manner.

■ In case that sound is suddenly off or there isabnormal odor or smoke, please unplug theequipment from the power socket to avoid potentialelectric shock, fire or other accident. The equipmentshould be inspected by professional personnel.

Burning Smell

■ If the equipment is not in use for a long period, pleaseunplug it from the AC power socket to realize zeroenergy consumption.

Contents1. PRODUCT INTRODUCTION......................................................................................................................................1

1.1 ABOUTMK6906/MK6920/MK6925.......................................................................................................................... 11.2 FEATURES....................................................................................................................................................................1

2. APPEARANCE DESCRIPTION.................................................................................................................................. 2

2.1 FRONT PANEL.............................................................................................................................................................. 22.2 REAR PANEL................................................................................................................................................................ 3

3. CONNECTION DIAGRAM..........................................................................................................................................5

3.1 SYSTEM DIAGRAM.......................................................................................................................................................53.2 SPEAKER CONNECTION DIAGRAM............................................................................................................................... 5

SPECIFICATION...............................................................................................................................................................7

PACKING LIST..................................................................................................................................................................8

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1

1. Product Introduction

1.1 About MK6906/MK6920/MK6925

MK6906/MK6920/MK6925 amplifier integrates balancing function and pre-amplifier and post amplifier. The

series is equipped with three sets of stereo sound source input ports, four microphone input ports, a stereo line

output ports, an recording output port and two groups of amplifier output terminals. Volume of three-way stereo

sound source channels can be controlled independently cooperating with function of “choose 1 out of 4”. Volume

of four microphones can be controlled independently. There is also a master volume control knob on the front

panel. Equipped with seven equal sections, output volume is adjustable.

This product is more user-friendly designed. It adopts innovative technology and produces powerful,

beautiful sound. Its functional operation is clear at a glance. At the same time, the product is designed for

conference, sound volume is adjustable. Besides, it has multiple protection and enough function, stable and

suitable for conference, background music, Karaoke OK, audio-visual and family engineering support.

1.2 Features

With 4 microphone inputs that can be balanced or unbalanced, independent volume adjustment of each

microphone, with mixing processing function and 7 equalization adjustment for microphone input, with

phantom power supply available (+48V)

With 3 audio (stereo) input, 2 audio output, with volume, bass, treble and equalization adjustment for audio

input

With audio source selection to select between line input and MP3. Audio from three ways and MP3 cannot

be output simultaneously. Only one channel or MP3 can output once.

Can play MP3 by USB. Can switch between two modes, select program, adjust volume, and select repeating

mode and EQ mode

With master volume adjustment

MK6906, with rated power 2×60W/8Ω (when working alone, power of each channel is 60W/8Ω)



With DC output protection, overload protection, short circuit protection and overheat protection

With output level and protection indicators for two channels

Infrared remote control of MP3

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2. Appearance Description2.1 Front panel

电源

7 BAND EQUALIZER FOR MIC

+12dB

0dB

-12dB

64Hz 160Hz 400Hz 1KHz 2.5KHz 6.4KHz 15KHz

BALANCETREBLEBASS

MP3 DISPLAY MP3

MIC 4

PROT108642

AUX

MIC 1 MIC 2 MIC 3 AUX VOL

L

RMP3

AUX1

AUX2

AUX3

POWER

+

MAIN VOL

DELAYECHO REPEATMIC 2MIC 1

MIC

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17

Stereo Pre-amplifier MK6906

1. POWER

2. MIC1\2

Mic signal input port with independent volume

control.

3. MIC volume 1\2\3\4

Each mic is with independent volume control. Turn

clockwise to increase the volume and turn

counterclockwise to decrease the volume.

4. ECHO

Adjust the echo volume and the ratio between echo

and the direct sound to better the effect.

5. DELAY

Can control the delay time. It’s the best to put switch

to the middle position.

6. REPEAT

For controlling frequency of echo repeating. It’s the

best to put switch to the middle position.

7. BASS

Clockwise adjustment for lifting, counterclockwise

adjustment for decreasing

8. TREBLE

Clockwise adjustment for lifting, counterclockwise

adjustment for decreasing

9. BALANCE

Control the sound image position of the main

channel and adjust the audio and video balance to its

best.

10. AUX volume adjustment (master volume)

The button is for adjusting three channels’ volume

(channel 1/2/3). The object adjusted depends on the

selected channel.

11. Output volume level indicator

If the 4th and 5th indicator is lighted, it means the

output gets tip distortion. Then you should adjust the

volume to turn it down and the 4th and 5th indicator

will flash.

12. 7 segment equalization adjustment fader

Slide the fader up to raise the amplitude of the band,

and slide the fader down to attenuate the amplitude

of the band.

13. MP3 player

MP3 program sequence display.

14. USB port

Connect to the audio device and turn on the power.

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select the MP3 channel source on the panel, insert the

USB interface in the USB program USB and the machine

will automatically start playing.

15. MP3 playing control buttons

Those buttons are play/pause, the previous one/the next

one

16. Channel selection button and indicator

Press the button to choose a sound source (AUX1、

AUX2、AUX3、MP3)to play. Indicator of selected

sound source will light up.

17. Master volume control

Turn clockwise to increase the volume and turn

counterclockwise to decrease the volume.

2.2 Rear panel

~220V/50Hz/4AF2AL250V

请勿打开,以免触电

警告

RISK OF ELECTRIC SHOCKDO NOT OPEN

CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R

123456789

10

产品名称:立体声前级功放

~220V/50Hz/8AF8AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R

产品名称:立体声前级功放广州市迪士普音响科技有限公司Guangzhou DSPPA Audio Co.,Ltd.

Nur Sicherung 250VUse Only With A 250V FuseEmployer Unlquement Avec Fusible De 250V

123456789

10

广州市迪士普音响科技有限公司Guangzhou DSPPA Audio Co.,Ltd.

~220V/50Hz/6AF4AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R

123456789

10


MK6920MK6906



Rear Panel of MK6906

~220V/50Hz/4AF2AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R

123456789

10


~220V/50Hz/8AF8AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R



123456789

10


~220V/50Hz/6AF4AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R

123456789

10


MK6920MK6906




~220V/50Hz/4AF2AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R

123456789

10


~220V/50Hz/8AF8AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R



123456789

10


~220V/50Hz/6AF4AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R

123456789

10


MK6920MK6906




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1. Power socket

Connect to~220V/50Hz/6A power. Don’t plug or unplug it when it’s powered on.

2. Fan window

For spreading heat.

3. Amplifier L output port

Can connect to multiple speakers. Total resistance should be no less than 8Ω.

4. Amplifier R output port

Can connect to multiple speakers. Total resistance should be no less than 8Ω.

5. Recording output

Can connect to peripheral equipment for audio recording.

6. Line output

For connecting to peripheral amplifier as aux line output port.

7. Audio input port

3-line audio stereo input. Can expand the local source input. Can connect to local DVD/radio. Note: Those 3-line

output and MP3 can’t be output together. Only one-line output or MP3 can be output.

8. MIC4 input port

9. MIC3 input port

10. +48Vphantom power switch

Turn the switch to “ON” and the +48V phantom power for the mic will be on. Turn the switch to “OFF” and the

phantom power will be off. When supporting the use of condenser microphones:

1: When using the condenser microphone, please turn the switch "PHANTOM" to "ON" position.

2: When using the moving coil microphone, please turn the switch "PHANTOM" to "OFF" position.

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3. Connection Diagram3.1 System diagram

3.2 Speaker connection diagram

Speaker

Power amplifier

CD player

Tuner

MP3 player

~220V/50Hz/8AF8AL250V


警告


CAUTION!

PHANTOM +48VON OFF

MIC 4MIC 3

2 31

AUXIN

AUXOUT

RECOUT

R+ + + +

L

L

R

L

R

L

R



R+ + + +

L

+8Ω

_

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6

Safety Precautions1． Safety Instruction

Do not insert the power plug of this device into the grid before connecting the system cable.

Make sure that the voltage input to the device is the same as this device. Otherwise, there is danger of burning the

equipment.

There is a dangerous voltage inside the machine, the voltage can cause electric shock, do not open the case, to

avoid the risk of electric shock.

When the power supply of this equipment is turned off, the machine is not completely disconnected to the power

supply. For safety reasons, please unplug the power plug from the outlet when the equipment is not using.

Do not place the device in a sub-cooled or overheated place.

Make sure that the working environment of the equipment is well ventilated, to avoid heating up during operation

and cause the equipment to be damaged.

Unplug the power plug in noisy weather or for longer periods of time.

Remove or reassemble any part of the device, disconnect or re-connect any electrical plugs or other connections to

the equipment, unplug the power plug to ensure that the device is completely disconnected from the grid.

When the equipment is faulty, the non-professionals without permission, please do not open the cabinet for

maintenance, to avoid accidents or increase the extent of damage to the equipment.

Do not place any corrosive chemicals near or above the equipment.

2． After-sales service note

Since the date of purchase, in accordance with the provisions of this manual to install and use, but there are quality

problems in the normal use, the company will provide three years of free warranty services. (including free

replacement parts)

About the warranty, the user must show the warranty card, user self-existence and sales invoice as a certificate.

The following conditions do not belong to the scope of free warranty:

1.Damage caused by improper installation, use or handling;

2.Damage the product due to abnormal conditions (Such as excessive power supply voltage or ambient humidity, etc.)

3.Due to natural disasters and other accidents caused by product damage;

4.Product body number is converted, altered or removed;

5.The product has been repaired or modified by an authorized person of other company;

Please keep the manual and warranty card.

For questions or precautions that are not mentioned in this manual, please contact your dealer or visit our website at

http://www.dsppatech.com if necessary.

If you are facing a malfunction during the warranty period, please contact our service personnel (or dealer) for repair

and handling. The Company will not be responsible for the free warranty if the self-disassemble or damage caused by

maintenance without our own technical staff.

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SpecificationModel MK6906 MK6920 MK6925

Microphone input sensitivity 5 ± 0.5mV 4.5±0.5mVLine input sensitivity 250 ± 50mV

MP3 input -10dB / 1KHZ sine wave Output 23V Output 32V Output 45VLine output voltage 950 ± 150mV

Total harmonic distortion ≤0.5 (1KHz, normal working conditions)

Line frequency response 20-20k Hz (± 3dB)

Microphone frequency response 80-20k Hz (± 3 dB)

Microphone 7 balanced

64HZ: ± 12dB

160HZ: ± 12dB

400HZ: ± 12dB

1KHZ: ± 12dB

2.5KHZ: ± 12dB

6.4KHZ: ± 12dB

15KHZ: ± 12dB

Line input and MP3 tone adjustment rangebass

100Hz: ± 12dB

Treble 10KHz: ± 12dB

Signal to noise ratio (8Ω output) ≥75dBWorking power supply AC220/ 50Hz

Phantom voltage + 48VRated power consumption 8Ω 60W 8Ω 120W 8Ω 250W

Protective function Overload, over temperature, short circuitDimension (L × W × H) 483x 310x 88 mm

Package dimension (L × W × H) 520mm×395mm×170mmGross weight 9.5kg 10.15kg 7.6kgNet weight 7.5kg 8.15kg 5.6kg

Specifications are subject to change without notice.

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Packing List

No. Item Quantity1 MK6906/MK6920/MK6925 12 User Manual 13 Warranty card 14 Certificate 15 SY542 cable/1500MM/Audio cable/V3.1 16 MP-P power line 17 Washer 48 Semi-round crosshead screws/White/5×19 49 Round crosshead screws/Black/3×8 810 EVAmat 411 Handle 2

Guangzhou DSPPAAudio Co., Ltd.

Attention● When the power switch of this unit is in the "off" state, the machine is not completely disconnected from the

power supply. For the sake of safety, please unplug the power cord from the outlet when the device is not in use.

● The device cannot withstand water droplets or water splashes and cannot place items such as vases filled with

water on the equipment.

● Do not open the machine cover, to prevent electric shock. If necessary, by a professional certificate of

professional staff to repair.

● Terminals marked with symbols in the device indicate hazardous, and the operation of connecting these

terminals must be carried out by instructed personnel.

● The device is connected through the power cord and the power supply. When the equipment fails or is

dangerous, Unplug the power cord to disconnect the device from the grid, so it is required to place the power

outlet in a place where the power cord can be easily plugged.

1. Product Introduction1.1 About MK6906/MK6920/MK69251.2 Features 2. Appearance Description2.1 Front panel2.2 Rear panel3. Connection Diagram3.1 System diagram3.2 Speaker connection diagramSpecificationPacking List

User’sManual...This manual start to be use when the Stereo Pre-amplifier MK6906/MK6920 development...

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