1. Introduction
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your Sunbuck 555BT and 298BT HiFi Stereo Digital Bluetooth Audio Amplifiers. These versatile 5-channel amplifiers are designed to enhance your audio experience for home theater, karaoke, car audio, and various other applications. Featuring built-in Bluetooth, FM radio, USB, and SD card playback, along with multiple microphone inputs, these amplifiers offer powerful and clear sound reproduction.
2. Safety Information
- Voltage Compatibility: Ensure the amplifier's voltage matches your local power supply. US Plug models are 110V; EU Plug models are 220V. Connecting to an incorrect voltage will damage the unit.
- Power Source: Use only the specified power supply. Unplug the unit during lightning storms or when unused for long periods.
- Ventilation: Do not block ventilation openings. Ensure adequate airflow around the unit to prevent overheating.
- Moisture: Do not expose the unit to rain, moisture, dripping, or splashing. Do not place objects filled with liquids, such as vases, on the apparatus.
- Heat: Keep the unit away from heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Speaker Impedance: Ensure connected speakers have an impedance between 4 to 16 ohms to prevent damage to the amplifier.
3. Setup Guide
3.1 Unpacking and Initial Inspection
Carefully remove the amplifier and all accessories from the packaging. Inspect the unit for any signs of damage. The package should include: 1x Amplifier (555BT or 298BT), 1x Remote Control, 1x FM Antenna, 1x User Manual, and 1x 32GB USB Card (gift).
3.2 Power Connection
Before connecting, verify the amplifier's voltage (110V for US Plug, 220V for EU Plug) matches your power outlet. Connect the provided power cord to the amplifier's power input and then to a suitable wall outlet.
3.3 Speaker Connections
The amplifier features 5-channel output. Connect your speakers to the corresponding terminals on the rear panel. Ensure correct polarity (+ to + and - to -) for optimal sound. The recommended load impedance for speakers is 4 to 16 ohms.
3.4 Audio Input Connections
- RCA Inputs: Connect external audio sources like CD/DVD players to the 'AUDIO INPUT' RCA jacks.
- USB/SD Card: Insert a USB disk or SD card into the respective slots on the front panel.
- FM Antenna: Connect the FM antenna to the 'FM ANT' terminal for radio reception.
3.5 Microphone Connections
The amplifier supports two wired microphones and one wireless microphone input. Connect your microphones to the 'MIC1' and 'MIC2' jacks on the front panel.
3.6 Subwoofer Connection (AV-555BT)
The AV-555BT model's rear panel includes an 'Audio Output' that can be connected to an active subwoofer for enhanced bass.
4. Operating Instructions
4.1 Powering On/Off
Press the 'POWER' button on the front panel to turn the amplifier on or off. The display will illuminate when powered on.
4.2 Input Selection
Use the 'MODE' button on the front panel or remote control to cycle through available input sources: Bluetooth, FM, USB, SD, CD/DVD (AUX).
4.3 Bluetooth Pairing
- Switch the amplifier to Bluetooth mode using the 'MODE' button. The display will show 'BLUE'.
- On your mobile device, enable Bluetooth and search for available devices.
- Select the amplifier (e.g., 'BT-AUDIO' or similar) from the list to pair.
- Once successfully paired, you can play audio from your device through the amplifier.
4.4 FM Radio Operation
- Switch the amplifier to FM mode using the 'MODE' button.
- Use the 'PREV' and 'NEXT' buttons on the front panel or remote to tune to different stations.
- The amplifier supports automatic search for FM stations (87.5MHz-108MHz).
4.5 USB/SD Card Playback
Insert a USB disk or SD card containing MP3 audio files into the corresponding slot. The amplifier will automatically detect and begin playing the audio. Use the 'PREV', 'NEXT', and 'PLAY/PAUSE' buttons to control playback.
4.6 Volume and Tone Controls
- Master Volume: Adjusts the overall output volume.
- Music Volume: Adjusts the volume of the music input.
- Mic Volume: Adjusts the volume of the microphone inputs.
- Bass/Treble: Adjusts the bass and treble levels for the music.
- Mic Reverb/Echo: Adjusts the reverb and echo effects for the microphones.
4.7 Remote Control Functions
The included remote control allows for convenient operation of the amplifier from a distance. Functions include power on/off, input mode selection, volume adjustment, track navigation (for USB/SD), and FM station tuning.
4.8 Operational Video
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or aerosol sprays.
- Ventilation: Regularly check that the ventilation openings are clear of dust and debris to prevent overheating.
- Storage: If storing the amplifier for an extended period, disconnect it from the power supply and store it in a cool, dry place.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not connected; Power outlet faulty; Power switch off | Check power cord connection; Try a different outlet; Ensure power switch is ON |
| No sound output | Incorrect input selected; Speaker wires loose/incorrectly connected; Volume too low; Mute activated | Select correct input mode; Check speaker connections and polarity; Increase volume; Deactivate mute |
| Bluetooth not connecting | Amplifier not in Bluetooth mode; Device too far; Previous device still connected | Switch to Bluetooth mode; Move device closer; Disconnect from previous device and try again |
| Poor sound quality | Loose connections; Incorrect tone settings; Low quality audio source | Check all cable connections; Adjust Bass/Treble controls; Use a higher quality audio source |
| Remote control not working | Batteries dead/incorrectly inserted; Obstruction between remote and amplifier | Replace batteries; Ensure clear line of sight to amplifier's IR receiver |
7. Specifications
7.1 Model: AV-555BT
| Feature | Specification |
|---|---|
| Power Amplifier Type | AV Power Amplifier |
| Material | Metal |
| Color | Black |
| Channel | 5.0 Channel |
| Output Power | 200W+200W+100W |
| Peak Power | 400W+400W (Max 2500W mentioned in title, likely total peak) |
| Voltage | AC220V-240V/50Hz (EU Plug) or AC110V/50Hz (US Plug) |
| Signal to Noise Ratio | 90dB |
| Standard Impedance | 4 to 16Ω |
| Rated Frequency | 20Hz-20KHz |
| Total Harmonic Distortion | ≤ 0.5% |
| Dimensions (L x W x H) | 43cm x 24cm x 11cm (including machine feet) |
| Net Weight | 4.3 KG |
| Connectivity | Bluetooth, SD Card, USB Disk, FM Radio, 2 Wired Mic Inputs, 1 Wireless Mic Input |
| Features | Dual dynamic screen, Treble/Bass/Volume control, Remote control |
7.2 Model: AV-298BT
| Feature | Specification |
|---|---|
| Channel | 5.0 Channel |
| Power | AC110V/220V |
| Rated Power | 200W+200W |
| Frequency Response | 20Hz-20KHz (+/-10dB) |
| Input Sensitivity | 150mV |
| Tone Control | 10dB at 10KHz (Treble), 8dB at 1kHz (Mid), 10dB at 100Hz (Bass) |
| Surround Effect Control | 0-10dB |
| Signal to Noise Ratio | ≥ 80dB |
| Loudness | +6dB at 100Hz / +6dB at 10KHz |
| Load Impedance | 4 to 8 ohms |
| DC12V Support | No |
| Color Options | Golden/Black |
| Dimensions (L x W x H) | 35cm x 28cm x 9cm (14 x 11 x 3.54 inches) |
| Connectivity | Bluetooth 5.0, FM Radio, LED Display, 2 Microphone Inputs, SD, USB, CD, DVD interface inputs |
| Features | Microphone reverb adjustment, Remote control |
8. Warranty and Support
For any issues, technical support, or warranty claims, please contact the seller or retailer from whom you purchased the product. Keep your purchase receipt as proof of purchase.
9. User Tips
- Speaker Matching: For optimal sound quality and to prevent damage, ensure your speakers' impedance matches the amplifier's specifications (4-16 ohms).
- Ventilation: Always ensure the amplifier has adequate ventilation to prevent overheating, especially during prolonged use.
- Cable Quality: Using high-quality audio cables can significantly improve sound clarity and reduce interference.
- Subwoofer Integration (AV-555BT): If you desire deeper bass, consider connecting an active subwoofer to the dedicated audio output on the AV-555BT model.
