SHOW MPA-2250 Multizone PA Mix Power Amplifier User Manual

SHOW MPA-2250 Multizone PA Mix Power Amplifier

SAFETY RELATED SYMBOLS

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 with 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
Hazardous live terminal .
Disposing of this product should not be placed in municipal waste and should be separate collection.
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.

Connection Description

BLOCK DIAGRAM

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 information

• Read these instructions.

• Keep these instructions

• Heed all warnings

• Only use attachments/accessories specified 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 Follow all instructions.
  No naked flame sources, such as lighted candles, should be placed on the apparatus. 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 when 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 harmful interference, 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.”

INTRODUCTION

Function introduction:

2 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 5 inputs and 2 outputs
• The series includes the following models: MA-2250 (250W2)/MA-2500 (500W2).

The main functions are as follows :

Ahead panel:

• Input1-Input4 volume control

• Input1-Input4 Bass and Treble control

• Input1-Input2 Echo function selection

• USB, Bluetooth, and zone1 or zone2 selection.

• Zone1 and Zone2 have a master volume control.

• One power switch
  Rear panel:

• 4 channel MIC or line input.

• 4 channel MIC/line/phantom selection switch.

• Zone1 and Zone2 output.

• Output can choose 4ohm/70V/100V

• FM antenna interface

• AC Power supply input.

• Cooling fan.

CONTROL ELEMENTS

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

(20)Priority terminal

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

(21)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.

CONTROL ELEMENTS

3. REAR PANEL

(12) FAN

(13) GND

(14) AC JACK

(15) Monitor line out

(16) INPUT1-4

(17) MIC/PHANTOM/LINE SELECT SWITCH

(18) OUTPUT TERMINALS

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.
   Note: MP3 player, recording, CD-201are assembled to different units of the series.

2. TREBLE(INPUT1-4)
   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.

3. 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.

4. INPUT 1-4VOL Knobs
   The knobs are used to adjust the gain of input1-4 respectively. Adjust clockwise to increase the volume while adjust counter-clockwise to decrease the volume.

5. 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.

6. ZONE1 VOL Knobs
   This knob is used to adjust the ZONE1 gain of the unit.

7. ZONE2 VOL Knobs
   This knob is used to adjust the ZONE2 gain of the unit.

8. Frequency response selection switch
   MIC| OUTDOOR| 200Hz~8KHz
   ---|---|---
   INDOOR| 150Hz~8KHz
   LINE| OUTDOOR| 170Hz~13KHz
   INDOOR| 90Hz~13KHz

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

10. ECHO FUNCTION
    It is used to control ECHO, When not using the ECHO function ,please turn the ECHO volume level to the minimun to avoid noise.

11. 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.
    

2. MP3 Operation Instructions

The Functions Description of USB PLAYER

Inputs Ports
USB:USB port
Control Keys

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

TECHNICAL SPECIFICATIONS

IMPORTANT!

Please read this manual carefully before operating this unit for the first time.

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