FONESTAR PROX-30 PA Amplifier with USB/MP3/FM Player User Manual

1. Introduction

The FONESTAR PROX-30 is a public address (PA) amplifier designed for sound installations using 100V line or low impedance speakers. This versatile unit integrates an amplifier, mixer, USB/MP3 player, and FM radio, along with multiple microphone and auxiliary inputs. Its compact design and intuitive controls make it suitable for various commercial and educational environments. This manual provides essential information for the safe installation, operation, and maintenance of your PROX-30 amplifier.

2. Safety Instructions

• Power Supply: Ensure the amplifier is connected to a power source matching the voltage specified on the unit (230V AC or 115V AC).
• Ventilation: Do not block ventilation openings. Ensure adequate airflow around the unit to prevent overheating.
• Moisture: Keep the amplifier away from water, rain, and excessive humidity. Do not operate with wet hands.
• Cleaning: Disconnect the power before cleaning. Use a dry cloth; do not use liquid cleaners or aerosols.
• Servicing: Refer all servicing to qualified service personnel. Do not attempt to open or repair the unit yourself.
• Overload: Avoid overloading the amplifier. Ensure speaker impedance and power ratings are compatible with the amplifier's output.

3. Product Features

• 30 W RMS output power.
• Integrated USB/MP3 player and FM radio.
• Microphone input with mix control, gain adjustment, and priority level.
• Tone controls for Bass and Treble.
• Multiple output options: 100V line and 4 Ohm low impedance.
• 100V line input with priority and mute function for emergency announcements.
• Secure and easy-to-connect Euroblock connectors.
• Compact and discreet design suitable for desktop use.

4. Controls and Connections

4.1 Front Panel

Figure 1: Front view of the FONESTAR PROX-30 PA Amplifier, showing the power button, USB port, media controls, microphone volume knobs, input volume knob, input selector, and status indicators.

• Power Button: Turns the unit on or off. Illuminated when active.
• USB Port: For connecting USB drives to play MP3 files.
• Media Controls: Buttons for Play/Pause, Stop, Previous Track, Next Track, Mode selection (USB/MP3/FM).
• MIC 1 / MIC 2 Volume: Adjusts the volume level for Microphone 1 and Microphone 2 inputs.
• INPUT VOL: Master volume control for selected audio input.
• INPUT Selector: Switches between AUX 1, AUX 2, and FM/MP3 inputs.
• Status Indicators:
  • PROT (Protection): Illuminates if the amplifier is in protection mode (e.g., due to overload or short circuit).
  • CLIP: Illuminates when the output signal is clipping, indicating distortion. Reduce input or master volume.
  • SIGNAL: Illuminates when an audio signal is present.

4.2 Rear Panel

Figure 2: Rear view of the FONESTAR PROX-30 PA Amplifier, showing various input/output connections, gain controls, tone controls, and power input.

• AUX 2 (RCA): Stereo RCA input for auxiliary audio sources.
• AUX 1 (RCA): Stereo RCA input for auxiliary audio sources.
• MIC 1 / MIC 2 (Euroblock): Balanced microphone inputs with Euroblock connectors.
• GAIN (MIC 1 / MIC 2): Adjusts the input sensitivity for Microphone 1 and Microphone 2.
• VOX (MIC 1 / MIC 2): Voice-activated priority switch. When enabled, microphone input will automatically lower other audio sources.
• BASS / TREBLE: Tone controls for adjusting the low and high frequencies of the audio output.
• FM ANT: F-type connector for connecting an FM antenna.
• EMERG. INPUT (100V LINE): Euroblock input for emergency audio signals, with priority over other inputs.
• REMOTE MUTE: Euroblock connection for remote muting functionality.
• SPEAKER OUTPUT (30W RMS):
  • 4 Ohm: Low impedance output for connecting 4 Ohm speakers.
  • COM: Common terminal for speaker connections.
  • 100V: High impedance output for connecting 100V line speakers.
• AC SELECT: Voltage selector switch (230V or 115V). Ensure this matches your local power supply before connecting.
• POWER CONSUMPTION: Indicates the maximum power draw (100W).
• AC INLET: IEC power input for the main power cable. Includes fuse holder.

5. Setup

5.1 Unpacking and Placement

• Carefully remove the amplifier from its packaging.
• Place the unit on a stable, flat surface.
• Ensure there is sufficient space around the unit for proper ventilation. Avoid placing it near heat sources or in direct sunlight.

5.2 Power Connection

• Before connecting, verify the AC SELECT switch on the rear panel matches your local mains voltage (230V or 115V).
• Connect the supplied power cable to the AC INLET on the rear panel and then to a suitable wall outlet.

5.3 Speaker Connections

The PROX-30 offers both 100V line and 4 Ohm low impedance outputs. Do not connect speakers to both outputs simultaneously.

• For 100V Line Speakers: Connect the positive (+) terminal of your 100V speakers to the 100V terminal and the negative (-) terminal to the COM terminal using Euroblock connectors. Ensure the total power of all connected speakers does not exceed 30W.
• For 4 Ohm Speakers: Connect the positive (+) terminal of your 4 Ohm speaker(s) to the 4 Ohm terminal and the negative (-) terminal to the COM terminal using Euroblock connectors. Ensure the total impedance of connected speakers is 4 Ohms.

5.4 Input Connections

• Microphones: Connect microphones to the MIC 1 or MIC 2 Euroblock inputs. Adjust the GAIN and VOX switches on the rear panel as needed.
• Auxiliary Devices: Connect audio sources like CD players, media players, or computers to the AUX 1 or AUX 2 RCA inputs.
• FM Antenna: Connect an FM antenna to the FM ANT connector for radio reception.
• Emergency Input: For emergency systems, connect the 100V line emergency signal to the EMERG. INPUT Euroblock.

6. Operating Instructions

6.1 Powering On/Off

Press the Power Button on the front panel to turn the amplifier on. The button will illuminate. Press it again to turn the unit off.

6.2 Using the USB/MP3 Player

• Insert a USB drive containing MP3 files into the USB Port.
• Use the MODE button to select the USB/MP3 input.
• Use the Play/Pause, Stop, Previous Track, and Next Track buttons to control playback.
• Adjust the INPUT VOL knob to control the output volume.

6.3 Using the FM Radio

• Ensure an FM antenna is connected to the FM ANT port.
• Use the MODE button to select the FM radio input.
• Use the Previous/Next Track buttons to scan for radio stations.
• Adjust the INPUT VOL knob to control the output volume.

6.4 Microphone Operation

• Connect your microphone(s) to MIC 1 or MIC 2 inputs.
• Adjust the corresponding MIC 1 / MIC 2 Volume knobs on the front panel to set the microphone level.
• Use the GAIN controls on the rear panel to fine-tune the microphone input sensitivity.
• If priority is desired, set the VOX switch to ON for the respective microphone. This will automatically lower other audio sources when the microphone is in use.

6.5 Auxiliary Input Operation

• Connect your auxiliary audio source to AUX 1 or AUX 2.
• Use the INPUT Selector button on the front panel to choose the desired AUX input.
• Adjust the INPUT VOL knob to control the output volume.

6.6 Tone Controls

Use the BASS and TREBLE knobs on the rear panel to adjust the low and high frequency response of the overall audio output to suit your preferences or room acoustics.

7. Maintenance

• Cleaning: Regularly wipe the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Ventilation: Ensure ventilation grilles remain clear of dust and debris.
• Fuse Replacement: If the unit does not power on, check the fuse located in the AC inlet. Replace it only with a fuse of the same type and rating (T2A).

8. Troubleshooting

• No Power:
  • Check if the power cable is securely connected.
  • Verify the AC SELECT switch matches your mains voltage.
  • Check the fuse in the AC inlet.
• No Sound Output:
  • Ensure speakers are correctly connected to the appropriate output (100V or 4 Ohm).
  • Check all volume controls (MIC, INPUT VOL) are turned up.
  • Verify the correct input source is selected (AUX 1, AUX 2, FM/MP3).
  • Check speaker cables for damage or short circuits.
• Distorted Sound:
  • Reduce the INPUT VOL or individual microphone volumes if the CLIP indicator is lit.
  • Ensure speaker impedance matches the amplifier output (4 Ohm or 100V line).
  • Check input signal levels from source devices.
• Microphone Not Working:
  • Check microphone cable connection.
  • Adjust MIC Volume and GAIN controls.
  • Ensure the microphone itself is functional.

9. Specifications