Sunbuck AV-298BT/AV-628BT Bluetooth Power Amplifier User Manual

1. Product Overview

The Sunbuck AV-298BT/AV-628BT is a compact, high-fidelity audio power amplifier designed for home audio, background music systems, and small-scale entertainment setups. It features built-in Bluetooth connectivity, multiple input options, and a sleek front-panel design, delivering clear, dynamic sound with easy operation.

2. Key Features

• Bluetooth Connectivity: Seamlessly pairs with smartphones, tablets, and laptops for wireless music playback (Bluetooth 5.0).
• Multiple Input Options: Supports RCA line-in (AUX), USB/SD card playback, and microphone input for versatile audio sources.
• Front-Panel Controls: Intuitive knobs for volume, bass, treble, and balance adjustment, plus input selection buttons.
• Digital Display: Shows input source, playback status, and volume level for clear operation feedback.
• Microphone Input: Includes two dedicated microphone jacks with volume, bass, treble, and reverberation controls, ideal for karaoke or voice announcements.
• Built-in FM Radio: Integrated radio receiver with automatic search function (87.5MHz-108MHz).
• Remote Control: Full-function remote control for convenient operation.
• Sleek Design: Compact, modern chassis with a premium finish, suitable for home and office environments.

3. Setup Instructions

3.1. Power Connection

1. Ensure the power switch is in the "OFF" position.
2. Connect the power cord to the AC input on the rear panel.
3. Plug the other end into a grounded electrical outlet. Ensure the voltage matches your amplifier's specification (110V for US Plug, 220V for EU Plug).

3.2. Speaker Connection

Use speaker wires to connect your speakers to the amplifier's rear panel.

• Connect the left (L) and right (R) speaker terminals on the rear panel to your speakers.
• Observe polarity markings (red = positive, black = negative) to ensure correct phasing and avoid audio distortion.
• Secure all connections tightly.

3.3. Audio Source Connection

• RCA Input (AUX): Use RCA cables to connect external audio devices (e.g., TV, CD player, turntable) to the AUX input terminals on the rear panel.
• USB/SD Card: Insert a USB flash drive or SD card into the corresponding slots on the front panel for direct audio file playback.
• Bluetooth Pairing: Power on the amplifier, select the "Bluetooth" input mode, and enable Bluetooth on your device. Search for "AV-298BT" or "AV-628BT" in your device's Bluetooth list and complete pairing.

3.4. Microphone Connection

• Plug a microphone into one of the front-panel microphone jacks (MIC1 or MIC2).
• Adjust the microphone volume knob to optimize vocal performance and avoid feedback.

4. Operating Instructions

4.1. Front Panel Controls

• Power Switch: Turns the amplifier on or off.
• Input Selector (MODE button): Cycles through available input sources (Bluetooth, AUX, USB/SD, FM).
• Master Volume Knob: Controls the overall audio output level.
• EQ Adjustments:
  • BASS: Adjusts low-frequency response.
  • TREBLE: Adjusts high-frequency response.
  • BALANCE: Adjusts left-right speaker balance.
  • LOUDNESS: Enhances bass and treble at low volumes.
• Microphone Controls:
  • MIC VOL: Controls the input level of connected microphones.
  • MIC BASS/TREBLE: Adjusts bass and treble for microphone input.
  • ECHO: Adjusts the reverberation effect for microphones.
• Digital Display: Shows current input source, playback status, and volume level.

4.2. Basic Operation Steps

1. Connect all necessary cables (power, speakers, audio sources, microphone) and ensure they are secure.
2. Turn on the power switch. The amplifier will initialize, and the display will activate.
3. Select your desired input source using the input selector (MODE) button.
4. Gradually increase the master volume to a comfortable listening level.
5. Adjust the BASS, TREBLE, and BALANCE controls to optimize the audio output.
6. When using a microphone, adjust the microphone volume, bass, treble, and echo knobs to avoid feedback and ensure clear vocal reproduction.
7. When finished, lower the master volume to the minimum, turn off the power switch, and disconnect the power cord.

4.3. Specific Function Operation

4.3.1. Bluetooth Operation

Press the MODE button until the screen displays "BLUE" mode. Then, open your mobile phone's Bluetooth settings, search for "AV-298BT" or "AV-628BT", and connect.

4.3.2. FM Radio Operation

Press the MODE button until the screen displays "FM" mode (numbers will appear). Press the Play button once to automatically search for radio stations and save them. When using the radio, ensure the antenna (black wire) is connected to the red wire clip on the rear panel.

4.3.3. USB/SD Card Playback

Copy downloaded MP3 audio to a USB disk or SD card and insert it into the corresponding jack on the front panel to play music.

4.4. Remote Control

1. Player standby and power button
2. Channel next
3. Channel previous
4. Next track
5. Previous track
6. Volume -
7. Volume +
8. Function button
9. Play/Pause
10. EQ effect
11. Mode selection
12. Recycle (Loop Playback)

5. Safety & Maintenance

• Operating Environment: Use the amplifier in a well-ventilated area away from direct sunlight, moisture, heat sources, and excessive dust.
• Overload Protection: Avoid operating the amplifier at maximum volume for extended periods to prevent overheating and component damage.
• Cleaning: Use a dry, soft cloth to wipe the exterior. Do not use liquid cleaners or aerosols directly on the unit.
• Cable Management: Ensure all cables are properly routed and secured to prevent tripping hazards and accidental disconnections.
• Emergency Procedures: If you notice unusual smells, smoke, or noises, immediately turn off the power and disconnect the cord. Do not attempt to repair the unit yourself; contact authorized service personnel.

6. Troubleshooting

7. Specifications

8. User Tips

• Power Voltage: Always verify that the amplifier's voltage setting (110V or 220V) matches your local power supply to prevent damage.
• Speaker Compatibility: This is an amplifier, so external speakers are required. Ensure your speakers have an impedance between 4 and 16 ohms and can handle the amplifier's power output (e.g., 2x50W RMS per channel).
• Power Ratings: Be aware that the advertised "2000W" is typically a peak or marketing power. The more relevant continuous power output is around 2x50W RMS per channel (for 2-channel models) or 250W+250W+120W RMS (for 5-channel models).
• Turntable Connection: You can connect a turntable to the RCA AUX input.
• Subwoofer Connection: The amplifier has RCA line-out ports that can be used to connect to an active subwoofer or active speakers.
• FM Antenna: For optimal FM radio reception, ensure the black antenna wire is properly connected to the red wire clip on the rear panel. If reception is poor, try adjusting the antenna's position.

9. Warranty & Support

9.1. Packaging Contents

• Sunbuck AV-298BT/AV-628BT Power Amplifier ×1
• Power cord ×1
• Remote control ×1
• English Manual ×1
• RCA audio cable ×1
• Warranty card ×1

9.2. Warranty Information

This product is covered by a manufacturer's warranty against defects in materials and workmanship for a period of 12 months from the date of purchase. For warranty claims, please contact the official customer service center with your purchase receipt and product details.

For additional guides and documents, you may refer to the User Manual (PDF).