1. Introduction
Thank you for choosing the Sunbuck 5-Channel Digital Karaoke Surround Power Amplifier. This manual provides essential information for the safe and efficient operation of your amplifier. Please read it thoroughly before use and retain it for future reference.
This amplifier is designed for household use, offering high-power audio output, professional karaoke features, digital media playback via USB/SD card, Bluetooth connectivity, and subwoofer support for a 5.1 channel surround sound experience.
2. Model Variants
The Sunbuck amplifier series includes several models with varying features. Please identify your specific model:
- A = AV-888BT: 5.1 channel amplifier without microphone.
- B = AV-888BT: 5.1 channel amplifier with rechargeable wireless microphone.
- C = AV-555BT: 5 channel amplifier without microphone.
- D = AV-555BT: 5 channel amplifier with rechargeable wireless microphone.
- E = AV-628BT: 5 channel amplifier without microphone.
- F = AV-628BT: 5-channel amplifier with rechargeable wireless microphone.
- G = KA-8900: 4-channel amplifier (with mixer) without microphone.
- H = KA-8900: 4-channel amplifier (with mixer) with rechargeable wireless microphone.
3. Package Contents
Please check the package for the following items:
- Sunbuck Digital Karaoke Surround Power Amplifier (Your selected model)
- Remote Control
- Power Cable
- Audio Cables (RCA, quantity may vary by model)
- User Manual (this document)
- Wireless Microphones (if included with your model)
4. Product Overview
4.1 Front Panel (AV-888BT/AV-628BT/AV-555BT)
The front panel provides access to various controls and inputs for audio adjustment and media playback.
4.2 Rear Panel (AV-888BT/AV-555BT)
The rear panel houses all the necessary audio input and output connections for your home theater system.
4.3 Remote Control Functions
The included remote control allows for convenient operation of the amplifier from a distance.
5. Specifications
Below are the general specifications for the Sunbuck amplifier series. Specific values may vary slightly by model.
| Feature | Specification (AV-888BT) | Specification (AV-555BT) | Specification (AV-628BT/KA-8900) |
|---|---|---|---|
| Rated Power | 400W | Main 250W+250W, Surround 100W+100W, Center 100W | 600W |
| Peak Power | 900W | N/A | 1200W |
| Standard Impedance | 4-16Ω | 4-16Ω | 4-16Ω |
| Frequency Response | 20Hz-20KHz (±3dB) | N/A | 20Hz-20KHz (±3dB) |
| Signal-to-Noise Ratio | ≥90dB (A-weighted) | N/A | ≥90dB (A-weighted) |
| Total Harmonic Distortion | ≤0.5% (normal operation) | N/A | ≤0.5% (normal operation) |
| Input Sensitivity | 200mV (±30MV) | N/A | 200mV (±30MV) |
| Recording Output | ≈1V | N/A | ≈1V |
| Auxiliary Output | ≈1V | N/A | ≈1V |
| Operating Voltage | 220V 50Hz | AC 220V | 220V-240V 50Hz |
| Dimensions (L×W×H) | 36x24x11.5cm | 43x24x11cm | 43x30x13cm (including feet) |
| Weight | 5.5KG | 4.3KG | N/A |
| Channel | 5.1 | 5 | 4 |
6. Setup
6.1 Speaker Connections
Connect your speakers to the corresponding terminals on the rear panel. Ensure correct polarity (positive to positive, negative to negative) for optimal sound quality.
- Main Speakers (FL/FR): Connect your front left and front right speakers.
- Surround Speakers (SL/SR): Connect your surround left and surround right speakers (for 5.1 channel models).
- Center Speaker: Connect your center channel speaker (for 5.1 channel models).
- Subwoofer: Connect either a powered subwoofer to the dedicated output or an unpowered subwoofer to the appropriate speaker terminals (if available on your model).
6.2 Audio Input Connections
The amplifier supports various audio input sources:
- RCA Audio Inputs (AUX): Use RCA cables to connect devices like DVD players, CD players, computers, or other audio sources to the 'AUDIO INPUT' jacks.
- Optical/Coaxial Input: Some models (e.g., AV-998BT) feature optical and coaxial inputs for direct connection to TVs or other digital audio sources.
- FM Antenna: Connect the FM antenna to the 'FM ANT' terminal for radio reception.
Warning: Audio output from the amplifier is not a power signal. Do not connect it directly to passive speakers or recording devices. Connect to powered speakers or a powered subwoofer. Incorrect connections may damage the equipment.
6.3 Microphone Connections
If your model includes microphone inputs, connect your wired microphones to the 'MIC INPUT' jacks. For models with wireless microphones, ensure they are charged and paired according to their separate instructions.
6.4 Power Connection
Connect the power cable to the amplifier's power input and then to a suitable 220V AC power outlet.
7. Operation
7.1 Power On/Off
Press the 'POWER' button on the front panel to turn the amplifier on or off.
7.2 Input Selection
Use the 'INPUT SELECTOR' or 'MODE' button on the front panel or remote control to switch between different audio sources (e.g., AUX, Bluetooth, USB, SD, FM, Optical/Coaxial).
7.3 Bluetooth Connectivity
To connect via Bluetooth:
- Press the 'BT/USB' button on the front panel until the LED display shows 'BLUE' (Bluetooth mode).
- On your mobile device, search for Bluetooth devices and select the amplifier (e.g., 'BT').
- Once paired, you can stream audio wirelessly from your device.
7.4 USB/SD Card Playback
Insert a USB drive or SD card into the respective slot on the front panel. The amplifier will automatically detect and play audio files. Use the playback controls (play/pause, previous/next track, loop) on the front panel or remote.
7.5 Karaoke Function
Connect microphones to the MIC INPUTs. Adjust microphone volume, echo, delay, bass, and treble controls to achieve desired vocal effects. The amplifier supports dual microphone output for duets.
7.6 FM Radio
Switch to FM mode using the input selector. Use the 'FM AUTO TUNE' button on the remote to scan and save available radio stations. You can then use the previous/next track buttons to navigate through saved stations.
7.7 Audio Adjustment
Use the 'MUSIC VOL' knob to control the overall music volume. Adjust 'BASS' and 'TREBLE' knobs for music tone control. The 'BALANCE' knob adjusts the left/right channel output. For models with EQ, use the EQ controls for more precise frequency adjustments.
8. Maintenance
8.1 Cleaning
Wipe the amplifier's exterior with a soft, dry cloth. Do not use liquid cleaners or solvents, as they may damage the finish or internal components.
8.2 Ventilation
Ensure adequate ventilation around the amplifier. Do not block the ventilation openings. Overheating can lead to malfunction and reduced lifespan.
8.3 Internal Components (for informational purposes only)
The amplifier features high-quality internal components designed for durability and performance.
9. Troubleshooting
If you encounter any issues, please refer to the following common problems and solutions:
- No Power: Ensure the power cable is securely connected and the power switch is in the 'ON' position. Check the power outlet.
- No Sound:
- Verify that the correct input source is selected.
- Check all audio cable connections between the source device and the amplifier, and between the amplifier and speakers.
- Ensure speaker wires are correctly connected to the terminals with proper polarity.
- Increase the master volume and individual input/microphone volumes.
- Bluetooth Connection Issues:
- Ensure the amplifier is in Bluetooth pairing mode ('BLUE' displayed).
- Make sure your mobile device's Bluetooth is enabled and within range.
- Forget the device on your phone and try pairing again.
- USB/SD Card Not Playing:
- Ensure the USB drive or SD card is inserted correctly.
- Check that the audio files are in a supported format.
- Try a different USB drive or SD card.
- Poor Sound Quality/Distortion:
- Check for loose connections.
- Adjust bass, treble, and balance controls.
- Ensure the input signal is not too strong, causing clipping.
10. User Tips
- For optimal karaoke performance, experiment with the 'ECHO' and 'DELAY' controls to find the perfect vocal effect for your voice.
- When connecting multiple audio sources, remember to switch the input selector to the correct source to hear audio.
- If using wireless microphones, ensure they are fully charged before use for uninterrupted performance.
- Position your speakers strategically for the best surround sound experience, especially for 5.1 channel setups.
11. Frequently Asked Questions
- Q: Can I connect my smartphone to this amplifier?
- A: Yes, all models feature built-in Bluetooth for wireless connection to smartphones and other Bluetooth-enabled devices.
- Q: What kind of speakers can I use with this amplifier?
- A: The amplifier supports speakers with an impedance of 4-16 ohms. You can connect floor-standing speakers, bookshelf speakers, or karaoke speakers.
- Q: Does it support digital audio input from a TV?
- A: Some models, like the AV-998BT, include optical and coaxial digital audio inputs for direct connection to compatible TVs.
- Q: How do I use the USB/SD card function?
- A: Simply insert a USB drive or SD card containing audio files into the respective slot. The amplifier will automatically switch to USB/SD mode and begin playback.
12. Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
Please note that unauthorized repairs or modifications may void your warranty.
