Facmogu 298A Stereo Audio Amplifier User Manual

Introduction

Thank you for purchasing the Facmogu 298A Stereo Audio Amplifier. This manual provides essential information for the safe and efficient operation of your new audio amplifier. Please read it thoroughly before use and retain it for future reference.

Image: Facmogu 298A Stereo Audio Amplifier with included remote control.

Safety Information

• Do not expose this appliance to dripping or splashing.
• Do not place objects filled with liquids, such as vases, on the apparatus.
• Ensure proper ventilation. Do not block any ventilation openings.
• Only use attachments/accessories specified by the manufacturer.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified service personnel.

Product Overview

Front Panel Controls

Image: Detailed view of the amplifier's front panel, highlighting the Power Switch, Treble Adjustment, Bass Adjustment, Microphone Volume Adjustment, Two Microphone Sockets, Digital Display, Mode Conversion, Play/Pause, Previous Song, Next Song, Single Cycle, and Total Volume Adjustment.

• Power Switch: Turns the unit on or off.
• Treble Adjustment: Adjusts the high-frequency output.
• Bass Adjustment: Adjusts the low-frequency output.
• Mic. Vol: Controls the volume of the microphone inputs.
• MIC1/MIC2: 6.35mm microphone input jacks.
• Digital Display: Shows current mode, track information, or FM frequency.
• Mode: Switches between input sources (Bluetooth, RCA, USB, SD, FM).
• Play/Pause: Controls media playback.
• Previous/Next Song: Navigates through tracks.
• Single Cycle: Repeats the current track.
• Volume: Main volume control knob.
• USB Socket: For USB flash drives.
• SD Card Socket: For SD/TF memory cards.

Rear Panel Connections

Image: Detailed view of the amplifier's rear panel, showing Audio Input (RCA), Left and Right Channel Speaker Outputs, 12V Power Input, 110V Power Cord, and Radio Antenna connection.

• Audio Input (RCA): Connect external audio sources like CD players, TVs, or DVD players.
• Speaker System (4Ω-16Ω): Connect passive speakers. Ensure correct polarity (+ to + and - to -).
• 12V Power Input (DC12V/5A): Alternative power input for 12V DC sources.
• AC Power Input (AC~110V/60Hz): Standard power cord connection.
• FM ANT: Connection for the FM radio antenna.

Setup

1. Speaker Connection

Connect your passive speakers to the Speaker System (4Ω-16Ω) terminals on the rear panel. Ensure the positive (+) terminal of the amplifier connects to the positive (+) terminal of the speaker, and the negative (-) terminal of the amplifier connects to the negative (-) terminal of the speaker. Incorrect polarity can result in poor sound quality.

2. Power Connection

Connect the provided 110V power cord to the AC Power Input on the rear panel and then to a standard wall outlet. Alternatively, for 12V DC operation, connect a compatible 12V/5A power source to the 12V Power Input.

3. Antenna Connection

For FM radio reception, connect the included FM antenna to the FM ANT port on the rear panel. Extend the antenna fully for optimal signal reception.

Operating Instructions

Power On/Off

Press the Power Switch on the front panel to turn the amplifier on or off. The digital display will illuminate when the unit is powered on.

Input Modes

Press the Mode button on the front panel or remote control to cycle through available input sources: Bluetooth, RCA, USB, SD Card, and FM Radio.

Image: Visual representation of the various input modes supported by the amplifier.

Bluetooth Pairing

1. Switch the amplifier to Bluetooth mode using the Mode button. The display will show "BLUE".
2. On your mobile device (phone, tablet, laptop), enable Bluetooth and search for available devices.
3. Select "BT-298A" from the list to pair. Once connected, you will hear a confirmation tone.
4. Keep the distance between the device and amplifier within 16.4ft/5m without any wall blocking. For PC devices, keep the distance within 6.5ft/2m.

USB/SD Card Playback

Insert a USB flash drive or SD/TF card into the respective port on the front panel. The amplifier will automatically switch to USB/SD mode and begin playing compatible audio files.

FM Radio Operation

1. Switch the amplifier to FM mode.
2. Press the AUTO button (or Play/Pause button) to start automatic scanning for channels. The amplifier will save receptive stations into consecutive presets.
3. Use the CH+/CH- buttons to navigate through the saved stations.
4. The frequency range of the radio reception is 87.5-108MHz.

Microphone Usage

Connect microphones to the MIC1 or MIC2 input jacks. Adjust the microphone volume using the Mic. Vol knob.

Tone Controls (Bass & Treble)

Use the Bass and Treble adjustment knobs on the front panel to fine-tune the audio output to your preference.

Volume Control

Adjust the overall output volume using the large Volume knob on the front panel or the volume buttons on the remote control.

Remote Control

The included remote control allows for convenient operation from a distance, including power on/off, mode selection, volume adjustment, track navigation, and FM tuning. Please remove the plastic insulating sheet from the remote's battery compartment before first use.

Maintenance

• Clean the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Keep the unit away from direct sunlight, heat sources, and excessive dust.
• Ensure proper ventilation by not blocking the vents on the unit.

Troubleshooting

Common Issues and Solutions

Image: Troubleshooting tips covering microphone hissing, remote control functionality, TV connection, and FM radio setup.

• Hissing Sound from Mic Ports: If you experience a hissing sound from the microphone ports even when no music is playing, it may be due to magnetic interference from Condenser Microphones. We suggest using Dynamic Microphones instead, or placing a magnetic block to eliminate the hissing.
• Remote Control: The remote control only operates certain functions. Ensure the plastic insulating sheet is removed from the battery compartment.
• TV Connection: When connecting to your TV via an audio cable, ensure the input selector has been adjusted to the line mode for proper use.
• FM Radio Setup: The FM chip memory is blank initially. To store stations, switch to FM mode, then press the pause button to search for channels. There will be noise during this process. Once completed, channels will be stored. There is currently no way to preset FM radio stations manually.

Image: Troubleshooting guide for power amplifier related issues.

• Bluetooth and Wired Connection Simultaneously: The Bluetooth function and wired connection cannot work at the same time. If you wish to use the amplifier via Bluetooth after a wired connection, restart the amplifier and then reconnect Bluetooth.
• Recommended Speaker Wattage/Size: The rated power for the 298A Amp is 40Wx2. If the rated power of your speaker is much greater, there might be no sound output. If you push it too hard, you can overdrive the amp, leading to clipping and potential damage to both speakers and amplifier. Connect speakers with a rated power below 40W.
• Power Amplifier Noise (Electric Current Sound): Inferior audio wire and input devices can cause noise. Speakers that do not match the amplifier's impedance can also lead to problems such as distortion. Ensure surrounding current signals do not cause interference. Make sure all cables are completely pushed in. Incompletely connected cables can create distortion. Ensure there is spacing between the output positive and negative audio lines; being too close together can cause noise or prevent channels from working.

Image: Troubleshooting steps for Bluetooth connectivity problems.

• Bluetooth Not Working: Ensure the Bluetooth mode is turned on (display shows "BLUE"). If not, press the "MODE" button until "BLUE" appears. Then, turn on Bluetooth on your cellphone and connect to "BT-298A".
• Unstable Bluetooth Connection: Ensure there are no obstacles (especially metals) blocking the signal. Turn off the power amplifier, disconnect and clear the Bluetooth connection from your transmitting device, and then try to reconnect. Keep the LED indicator side of the amplifier facing your phone and maintain a distance within 16.4ft/5m. For TV or PC devices, keep the distance within 6.5ft/2m.
• Connecting Two Devices with Bluetooth: No, connecting two devices at the same time will cause the audio stream to be disrupted. It can only be disconnected from one and then connected to another device.

Specifications

Image: Diagram showing the physical dimensions of the Facmogu 298A amplifier.

Warranty and Support

Facmogu provides a one-year warranty for this product. If you encounter any problems or have questions regarding your amplifier, please do not hesitate to contact our customer support. We believe that good service is almost as important as the product itself!

For further assistance, please visit the official Facmogu store or contact the seller directly through your purchase platform.