AMC DMPA Light Media Player Amplifier

Safety Instructions

When using this electronic device, basic precautions should always be taken, including the following:

1. Read all instructions before using the product.
2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet basement or near a swimming pool etc). Care should be taken that objects do not fall into liquids and liquids would not be spilled on the device.
3. Use this device when you are sure that it has a stable base and it is fixed securely.
4. This product, in combination with loudspeakers may be capable of producing sound levels that could cause permanent hearing loss. Do not operate for a long period of time at a high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult with an otorhinolaryngologist.
5. The product should be located away from heat sources such as radiators, heat vents, or other devices that produce heat.
6. Note for power connections: for pluggable equipment, the socket-outlet shall be installed near the equipment and shall be easily accessible.
7. The power supply should be undamaged and never share an outlet or extension cord with other devices. Never leave device plugged into the outlet when it is not being used for a long period of time.
8. Power disconnection: when the power cord connected to the power grid is connected to the machine, the standby power is turned ON. When the power switch is turned ON, the main power is turned ON. The only operation to disconnect the power supply from the grid, unplug the power cord.
9. Protective Grounding - An apparatus with class I construction shall be connected to a power outlet socket with a protective grounding connection. Protective Earthing - An apparatus with class I construction shall be connected to a mains socket outlet with a protective earthing connection.
10. The lightning flash with an arrowhead symbol, with 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. ⚡
11. The exclamation mark 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. ⚠️
12. There are some areas with high voltage inside, to reduce the risk of electric shock do not remove cover of the device or power supply. The cover should be removed by qualified personnel only.
13. The product should be serviced by qualified service personnel if: The power supply or the plug has been damaged. Objects have fallen into or liquid has been spilled on the product. The product has been exposed to rain. The product has been dropped or the enclosure damaged.

CAUTION

RISK OF ELECTRIC SHOCK. DO NOT OPEN.

To reduce the risk of electric shock, do not remove screws. No user-serviceable parts inside. Refer servicing to qualified service personnel. To reduce the risk of fire, electric shock or product damage, do not expose this apparatus to rain, moisture, dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on the apparatus.

Before you start

The DMPA Light series device is a compact 1U half-rack size public address mixing amplifier, containing a media player with AUX input, Bluetooth and FM radio receivers, 1 microphone input, and emergency mute control. This system is designed for installations, such as gas stations, restaurants, and convenience stores, where easy operation is appreciated.

FEATURES

• Compressed audio playback
• Stereo RCA AUX input
• Supports up to 32 GB USB flash and SD cards
• Emergency mute
• Bluetooth and FM radio receivers
• Amplifier output with phoenix connector
• 3 channel mixer with microphone and aux inputs
• Supports 100 V and low impedance speaker installations
• Microphone input priority and phantom power
• DMPA 120 & 240 Light supports 2 Ω speaker installations
• RCA output

Operation

Front Panel

The front panel includes controls for:

• MIC, AUX & Media player volume: Rotary knobs for adjusting the volume level of the selected channel.
• Bass and treble controls: Tone controls provide attenuation of bass and treble response. The flat position is obtained when the knobs are set to the middle position. Turning the knob clockwise raises the tone level approximately +7.5 dB for bass and +10 dB for treble. Turning counter-clockwise lowers the tone level by approximately -7.5 dB for bass and +10 dB for treble.
• AUX INPUT: A 3.5 mm stereo TRS input for an auxiliary audio source. Select AUX input in the media player to play sound from this input. Volume is controlled with the "PLAYER" level control knob on the front panel.
• MASTER VOLUME: Rotary knob for adjusting the master volume.

The front panel also features:

• USB drive input
• 3.5 mm AUX input
• LCD display
• Mode button
• Player control buttons
• Repeat function button
• Media player mute / power button

Rear Panel

The rear panel includes:

• Mains power input & fuse holder: Power connector for mains power, combined with a fuse holder. Use only the same type of fuse that is written on the device.
• Power switch: Switches the amplifier power ON or OFF.
• Ground connecting point
• Amplifier output
• DC power supply input
• RCA LINE output: RCA stereo output for connecting the device to an external audio amplifier or other equipment.
• RCA AUX input
• Phantom power and mic input priority settings: The MIC input can provide 18 V phantom power for condenser microphones. This input can also have a priority over other inputs.
• Microphone input
• 24 V emergency mute connector: When 24 V DC current is supplied to the EMG MUTE input, all device outputs will be muted. This is useful when using the device combined with external alarm systems.
• FM antenna connector

Media player functions

• LCD SCREEN: Displays main information about the media player status: track number and time, media player volume level, music source, and FM frequency.
• USB FLASH DRIVE: Supports up to 32 GB USB flash drives formatted in FAT32 file system.
• MODE: Switches the player between Bluetooth, FM, and USB player modes.
• FM ANTENNA: F-type connector for the FM radio antenna.

PLAY/PAUSE

Switches the player mode between play and pause. Holding this button in FM mode starts radio station auto scan. Pressing this button rapidly toggles FM frequency auto/manual scanning mode.

FORWARD / BACKWARD

A single short press in music and Bluetooth modes changes the currently playing track. Holding the buttons for a few seconds increases or decreases the volume level of the media player. In FM mode, use these buttons to change the FM frequency in 0.1 MHz steps, and also to switch radio presets.

PLAY FROM USB

When a USB memory stick is inserted into the USB port, the track number and time will show on the display, and audio files will start to play automatically.

REPEAT AND RANDOM PLAY

Select one of three modes:

• RTA - Repeat all tracks
• RT1 - Repeat one track
• RND – Random play

The second function of this button is to save the FM radio frequency to a selected preset. Pressing the button again selects the next preset.

MUTE/POWER

Press this button to mute audio. Hold this button longer to turn the media player off or on.

FM radio receiver

The FM radio receiver allows saving up to 26 presets with selected radio stations. It uses the same control buttons, but with different functionality.

ENTER TO AUTO TUNING MODE

Press and hold the Play/Pause button for a few seconds to scan available stations and store them as presets. Press and hold the Play/Pause button for a few seconds again to abort auto tuning.

ENTER TO MANUAL TUNING MODE

Press the Play/Pause button to enter manual tuning mode. Use the Backward/Forward buttons to adjust the frequency in 0.1 MHz steps. Press the Repeat button to select a preset number and change it using the Backward/Forward buttons. Press the Repeat button again to save the radio station to a preset. Press the Mute button to exit manual frequency adjusting without saving the radio station preset.

Bluetooth

PAIR

1. Enter Bluetooth mode on your DMPA Light media player.
2. Open the Bluetooth settings menu on your mobile device and search for "AMC Player_0000" in the list of available devices.
3. Select "AMC Player_0000" and confirm that it is connected as an audio device.

CONTROL

Backward, Forward, and Play/pause buttons control the audio player on your mobile device.

Holding the Backward or Forward buttons adjusts the output volume of the mobile device.

RENAME

Customize the device Bluetooth name by holding the Play/Pause button until "AMC Player_0000" is displayed. It is possible to change a 4-digit part of the name. Press the backward or Forward buttons to edit the number and Play/Pause to select another character. Hold Play/Pause to save changes and exit.

Android devices have the facility to re-name devices within the Bluetooth settings menu. If the Bluetooth ID has been re-named on the Android device, editing the Bluetooth ID on the media player will not affect the name displayed on that Android device.

General Specifications

DMPA Light Media Player Amplifier

The specifications are correct at the time of printing this manual. For improvement purposes, all specifications for this unit, including design and appearance, are subject to change without prior notice.