1. Introduction
The Sunbuck AV-628BT is a versatile 5.0-channel HiFi stereo karaoke audio amplifier designed to elevate your audio experience. With its advanced audio processing chip, it delivers rich, layered sound for music and powerful dynamics for movies. This amplifier supports multiple input sources including SD card, USB, RCA, AUX, and Bluetooth 5.0, making it suitable for a wide range of applications from home theater to karaoke parties.
2. Package Contents
Please check the package for the following items:
- 1x Sunbuck AV-628BT Audio Amplifier
- 1x Radio Antenna
- 1x Remote Controller
- 1x English & Chinese User Manual
3. Setup Guide
Follow these steps to set up your AV-628BT amplifier:
- Placement: Place the amplifier on a stable, flat surface with adequate ventilation. Ensure no objects block the ventilation grilles on the sides and top.
- Power Connection: Connect the power cord to the amplifier's power input on the rear panel and then to a suitable 220V AC power outlet.
- Speaker Connection: Connect your speakers to the "SPEAKER OUTPUT" terminals on the rear panel. Ensure correct polarity (+ to + and - to -) for optimal sound. The amplifier supports 4Ω-16Ω impedance speakers.
- Audio Input Connection:
- RCA/AUX: For external audio devices (e.g., CD player, TV), connect them to the "AUDIO INPUT" (AUX1, AUX2, LINE) RCA jacks on the rear panel.
- USB/SD Card: Insert a USB flash drive or SD card into the respective slots on the front panel for direct media playback.
- Bluetooth: Power on the amplifier and select Bluetooth mode. Pair your Bluetooth-enabled device (e.g., smartphone, tablet) with the amplifier. The Bluetooth connection range is up to 10m (32.8ft).
- Microphone Connection: For karaoke, connect up to two microphones to the "MIC1" and "MIC2" input jacks on the front panel.
- FM Antenna: Connect the included radio antenna to the "FM ANT" terminal on the rear panel for improved FM radio reception.
Front Panel Controls:
- Power Switch
- SD Card Insertion
- USB Interface
- Setting Button (for media playback)
- MIC Input (MIC1, MIC2)
- MIC Volume Adjustment
- MIC Bass Adjustment
- MIC Treble Adjustment
- Echo Adjustment
- Music Volume Adjustment
- Balance Knob
- Loud (Loudness)
- Music Treble Adjustment
- Music Bass Adjustment
Back Panel Connections:
- RCA Input (AUX1, AUX2, LINE)
- LINE Output (Audio Output)
- Speaker Output (Left/Right)
- SR SL C Speaker Output (Surround Left, Surround Right, Center)
- FM ANT (FM Antenna Input)
- Power Line (AC Power Input)
4. Operating Instructions
- Power On/Off: Press the "POWER" button on the front panel to turn the amplifier on or off. The display will show "HELLO" upon startup.
- Input Selection: Use the "MODE" button on the front panel or the remote control to cycle through input sources: Digital (USB/SD/MMC), FM/BT, Karaoke, AUX. The selected input will be displayed (e.g., "AUX").
- Volume Control:
- Main Volume: Rotate the large "VOLUME" knob on the front panel or use the "VOL+" / "VOL-" buttons on the remote to adjust the overall music volume.
- Microphone Volume: Use the "MIC VOL" knob to adjust the microphone volume.
- Tone and Effect Adjustment:
- Music Tone: Adjust "BASS" and "TREBLE" knobs for music.
- Microphone Tone: Adjust "M.BASS" and "M.TREBLE" knobs for microphone sound.
- Loudness: Toggle the "LOUDNESS" switch ON/OFF for enhanced bass and treble at low volumes.
- Balance: Use the "BALANCE" knob to adjust the left/right channel balance.
- Echo: Use the "ECHO" knob to add reverberation to microphone audio.
- Media Playback (USB/SD): When a USB drive or SD card is inserted and selected as input, use the playback control buttons (play/pause, previous, next) on the front panel or remote.
- Remote Control: The included remote control provides convenient access to power, mute, mode selection, volume, EQ, and playback controls. The effective range for the remote controller is approximately 6m (19.7ft).
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the amplifier's exterior. Do not use liquid cleaners or abrasive chemicals.
- Ventilation: Ensure the ventilation grilles are free from dust and obstructions to prevent overheating.
- Storage: When not in use for extended periods, store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid Liquids: Keep the amplifier away from water and other liquids to prevent electric shock or damage.
6. Troubleshooting
If you encounter issues with your amplifier, please refer to the following common problems and solutions:
- No Power:
- Check if the power cord is securely connected to both the amplifier and the power outlet.
- Ensure the power outlet is functioning correctly.
- Verify the power switch on the amplifier is in the "ON" position.
- No Sound:
- Check all speaker connections for proper seating and polarity.
- Ensure the correct audio input source is selected (AUX, USB, Bluetooth, etc.).
- Increase the main "VOLUME" knob.
- Check the audio source device (e.g., phone, TV) for its volume level and output settings.
- If using microphones, ensure "MIC VOL" is adjusted and microphones are properly connected.
- Poor Sound Quality:
- Check all audio cable connections for secure fit and damage.
- Ensure the audio source is of good quality.
- Adjust "BASS" and "TREBLE" knobs to optimize sound.
- Verify speaker impedance matches the amplifier's specifications (4Ω-16Ω).
- Bluetooth Pairing Issues:
- Ensure the amplifier is in Bluetooth mode.
- Make sure your device's Bluetooth is enabled and within the 10m (32.8ft) range.
- Forget the device from your Bluetooth settings and try pairing again.
- Ensure no other devices are currently connected to the amplifier via Bluetooth.
If the problem persists, please consult the full user manual or contact customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Sunbuck |
| Model | AV-628BT |
| Material | Aluminum Alloy |
| Color | Black |
| Input Type | SD, USB, RCA, AUX, Bluetooth 5.0 |
| Output Type | Speakers |
| Control Methods | Hand, Remote |
| Distortion Rate | 0.5% (Under Rated Power) |
| Surround Sound Channel | 5.0-channel |
| Adapter Plug | European Plug |
| Voltage | 220V |
| Max. Power | 600W |
| Rated Power | 200W + 200W |
| Impedance | 4Ω-16Ω |
| RMS | 45W + 45W |
| Resolution | 38DB |
| SNR (Signal-to-Noise Ratio) | 78dB |
| Number of Microphone Jacks | 2 |
| Bluetooth Connection Range | ≤10m / 32.8ft |
| Remote Controller Range | About 6m / 19.7ft |
| Remote Controller Size | 11.8 x 4 x 1.5 cm / 4.7 x 1.6 x 0.6 in |
| Power Cord Length | 1.2m / 3.9ft |
| Product Size (L x W x H) | 42.7 x 28 x 6.6 cm / 16.8 x 11 x 2.6 in |
| Net Weight | 3.4 kg / 7.5 lbs |
| Gross Weight | 4.35 kg / 9.6 lbs |
8. Warranty and Support
This product comes with a free return policy within 90 days of purchase. For detailed warranty information, technical support, or service inquiries, please refer to the comprehensive user manual included in your package or contact the seller directly through the platform where you purchased the product.
Always read the manual carefully and pay attention to all safety precautions.
