SHOW MPA-4150 Multizone PA Mix Power Amplifier User Manual

THE UNIVERSE OF INSTALLATION
MULTIZONE PA.
MIX POWER AMPLIFIER
User’s Manual MPA-4150/MPA-4250

IMPORTANT!
Please read this manual carefully before operating this unit for the first time.
All rights reserved to SEIKAKU. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this catalogue without written permission is forbidden. Copyright © 2009 SEIKAKU GROUP

SAFETY RELATED SYMBOLS

CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
The symbol is used to indicate that some hazardous live terminals are involved within this apparatus, even under the normal operating conditions.
The symbol is used in the service documentation to indicate that specific component shall be only replaced by the component specified in that
Documentation for safety reasons.
Protective grounding terminal.
Alternating current /voltage.
Hazardous live terminal
ON: Denotes the apparatus turns on.
OFF: Denotes the apparatus turns off, because of using the single pole switch, be sure to unplug the AC power to prevent any electric shock before you proceed your service.
WARNING: Describes precautions that should be observed to prevent the danger of injury or death to the user.
Disposing of this product should not be placed in municipal waste and should be separate collection.
CAUTION: Describes precautions that should be observed to prevent danger of the apparatus.
WARNING

• Power Supply
  Ensure the source voltage matches the voltage of the power supply before turning ON the apparatus. Unplug this apparatus during lightning storms or when unused for long periods of time.

• External Connection
  The external wiring connected to the output hazardous live terminals requires installation by an instructed person, or the use of readymade leads or cords.

• Do not Remove any Cover There are maybe some areas w ith high voltages inside, to reduce the risk of electric shock, do not remove any cover if the power supply is connected. The cover should be removed by the qualified personnel only.
  No user serviceable parts inside.

• Fuse To prevent a fire, make sure to use fuses with specified standard (current, voltage, type). Do not use a different fuse or short circuit the fuse holder. Before replacing the fuse, turn OFF the apparatus and disconnected the power source.

• Protective Grounding Make sure to connect the protective grounding to prevent any electric shock before turning ON the apparatus. Never cut off the internal or external protective grounding wire or disconnect the wiring of protective grounding terminal.

• Operating Conditions
  This apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on this apparatus.

To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Do not use this apparatus near water. Install in accordance with the manufacture-r’s instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not block any ventilation openings.
No naked flame sources, such as lighted candles, should be placed on the apparatus.

IMPORTANT SAFETY INSTRUCTIONS

• Read these instructions.

• Follow all instructions.

• Keep these instructions.

• Heed all warnings.

• Only use attachments/accessories spec ified by the  manufacturer.

• Power Cord and Plug
  Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

• Cleaning
  When the apparatus needs a cleaning, you can blow off dust from the apparatus with a blower or clean with rag etc. Don’t use solvents such as benzol, alcohol, or other flu ids with very strong volatility and flammability for cleaning the apparatus body. Clean only with dry cloth.

• Servicing
  Refer all servicing to qualified personnel. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so .
  Servicing is required wh en the apparatus has been damaged in any way , such as power supply cord or plug is damaged , liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture , does not operate
  normally, or has been dropped.

The mains plug is used as the disconnect device , the disconnect device shall remain readily operable.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two  conditions: (1) this device may not cause harmfulinterference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
FCC Statement:
“This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However , there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
-Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
– Consult the dealer or an experienced radio/TV technician for help.”
Function introduction:
4 Zons Class D P.A. AMP series

• The class D professional public address amplifire series are designed for small hotels,super-market and schools.
• They have good performance and supply the excellent quality of sound. Besides, users can operate easily.
• The class D professional public address amplifire series have 7 inputs and 4 outputs
• The series includes the following models: MPA-4150 (150W4)/MPA-4250 (250W4).

The main functions are as follows :
Ahead panel:

• Ahead panel:
• Input1-Input5 volume control ;TEL volume control
• Input1-Input5 Bass and Treble control
• Input1-Input2 Echo function selection
• USB,Bluetooth,and MP3 ZONE1 ZONE2 ZONE3 ZONE4 volume knob
• ZONE1 ZONE2 ZONE3 ZONE4 master volume knob
• ZONE1 ZONE2 ZONE3 ZONE4 Bandwidth selection button

Rear panel:

• 4 channel MIC or line input.1 AUX INPUT
• 4 channel MIC/line/phantom selection switch.
• Zone1 – 4 output.
• Output can choose 4ohm/70V/100V
• AC Power supply input.
• Cooling fan.
• Monitor line out ; 1W8Ohm monitor ; Priority terminal; TEL paging input

CONTROL ELEMENTS

Take the below model with MP3 player + ECHO for example.

1. FRONT PANEL

1. MP3 MODULE
   Regarding its function and operation, please see the BGM module description in detail.

2. MP3 VOL Knobs
   The knobs are used to adjust the gain of MP3. Adjust clockwise to increase the volume while adjust counterclockwise to decrease the volume.

3. Partition selection input button
   Signals are assigned to Zone 1, Zone 2, Zone 3 and Zone 4 inputs respectively

4. ECHO FUNCTION
   The ECHO function knob, the ECHO effect is turned clockwise, and the ECHO effect is attenuated counterclockwise.

5. TREBLE(INPUT1-5)
   Use the knob to control the high frequency at the range of 10dB.Turn clockwise to boost and counterclockwise to attenuate the treble response. Tone is flat at centre.

6. BASS(INPUT1-4)
   Use the knob to control the low frequency at the range of 10dB.Turn clockwise to boost and counterclockwise to attenuate the treble response. Tone is flat at centre.

7. INPUT 1-5 VOL Knobs
   The knobs are used to adjust the gain of input1-5 respectively. Adjust clockwise to increase the volume whi le adjust c ounter-clockwise to decrease the volume.

8. TEL VOLUME
   Allows you to set the audio signal output volume from the phone line. When you don’t use the phone line, we recommend to use the volume level to 0.

9. ZONE1-4 master volume knob
   This knob is used to adjust the ZONE1-4 gain of the unit.

10. Bandwidth selection button****
    | OUTDOOR|  INDOOR
    ---|---|---
    MIC: (1~4)| 178Hz-7.96KHz| 132Hz-7.96KHz
    LINE: (1~4)| 138Hz-12.6KHz| 70Hz-12.6KHz
    AUX(INPUT5)| 144Hz-17KHz| 76Hz-17KHz

11. POWER SWITCH
    The main power can be switched on or off with it.

MP3 Operation Instructions
The Functions Description of USB PLAYER
Inputs Ports
USB:USB port
SD/MMC:SD/MMC cards port
Control Keys

| ACTION| USB| BLUETOOTH
---|---|---|---
MENU| Short press| USB| ON
Long press| OFF| OFF
PLAY/PAUSE| Shod press| Play/Pause| Play/Pause
FILE| Shod press| Browsing file| /
REPEAT| Shod press| Repeat file(6 modes)| /
BACK| Shod press| Previous file| Previous file
Long press| Volume down| Volume down
NEXT| Shod press| Next file| Next file
Long press| Volume up| Volume up

Bluetooth Connection
When using a Bluetooth connection between the amplifer and other devices like smartphones,search the RTL-29 matching name and valid the connection.

REAR PANEL

1. FAN
   It is used to blow off heat and cool when the temperature rises during operation.

2. AC JACK
   This connector is meant for connection of the supplied main cord.
   Do not insert the power cord into this unit until voltage has been correctly set.

3. OUTPUT TERMINALS
   Connection for low impedance 4 speaker ;connections for constant voltage,70V or 100V speakers.

4. GND
   It is ground connection.

5. Monitor line out
   This terminal allows you to connect other device, such as amplifier, recorder, etc.

6. 1W8Ohm monitor
   Use this terminal to connect small external speakers, which will be powered by an auxiliary power amplifier, offering a 1W of nominal output.

7. Priority terminal
   When these terminals are in short circuit(e.g. Using an electrical switch), the audio signal from channels 2-5 are attenuated.

8. TEL paging input
   Use these terminals to connect an auxiliary signal. The input features of Voice Priority function,which overrides all other input signals once, an auxiliary message is sent.

9. INPUT1-4
   They are used for balanced input, LINE and MIC respectively.

10. MIC/PHANTOM/LINE SELECT SWITCH
    Select LINE input; MIC input; power supply for condenser microphone input

11. AUX INPUT
    AUX unbalanced input

CONNECTION DESCRIPTION

TECHNICAL SPECIFICATIONS

SHOW® is a registered trademark of
SEIKAKU TECHNICAL GROUP LIMITED
NO.1 LANE 17, SEC.2, HAN SHI WEST ROAD, TAICHUNG 40151, TAIWAN
tel: 886-4-22313737
fax: 886-4-22346757
www.show-pa.com

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