1. Introduction
The SUNBUCK AV-660BT is a versatile 2.0 channel Hi-Fi stereo karaoke audio amplifier designed for various applications including home audio, car audio, small parties, meetings, and theater setups. It features multiple input options, Bluetooth 5.0 connectivity, FM radio, and a 5-band EQ mixer for enhanced sound control.
Figure 1: SUNBUCK AV-660BT Amplifier Front View with Remote
2. Features
- Two signal inputs: DVD signal and AUX signal (RCA)
- 115V/230V Power conversion switch
- Includes a remote control for convenient operation
- Bluetooth 5.0 for wireless audio streaming
- Built-in FM radio tuner
- 5-band EQ mixer for sound customization
- Reverberation, fine tuning, and balance controls
- SD card and USB disk interfaces for MP3 playback
- Two microphone inputs for karaoke
- Adjustable microphone reverb and delay
3. Package Contents
Please check the package for the following items:
- 1 x SUNBUCK AV-660BT Power Amplifier
- 1 x Remote Control
- 1 x User Manual
Note: USB Disk and SD Card (Max 64GB) are not included.
4. Specifications
Figure 2: Amplifier Dimensions
| Feature | Specification |
|---|---|
| Model | AV-660BT |
| Dimensions (L x H x D) | 200 x 70 x 190 mm (7.9 x 2.8 x 7.5 inches) |
| Voltage | 115V/230V (Switchable), DC12V |
| Rated Power | 400W |
| Peak Power | 800W |
| Rated Frequency | 20Hz - 20KHz |
| Signal to Noise Ratio | ≥ 90dB |
| Standard Impedance | 4 to 16 ohm |
| Amplifier Type | AV Power Amplifier |
| Channel | 2.0 Channel |
| Total Harmonic Distortion | ≤ 0.5% |
| Signal Input Sensitivity | 200mv (± 30mv) |
| Microphone Input Sensitivity | 9 mv (± 2mv) |
| Recording Level Output | 1V |
| Auxiliary Level Output | 1V |
| Supported Media | USB Disk / Max 64GB SD Card (MP3 format) |
| Color Options | Black, White |
| Certification | CE |
| Origin | Mainland China |
5. Setup Guide
5.1. Panel Overview
Figure 3: Front and Rear Panel Layout
Front Panel Controls:
- Power Switch (ON/OFF): Turns the amplifier on or off.
- Mic Input (MIC1, MIC2): 6.35mm jacks for connecting microphones.
- Mic VOL: Adjusts the volume of the microphones.
- Echo: Controls the echo effect for microphones.
- Treble: Adjusts the high-frequency sound.
- Bass: Adjusts the low-frequency sound.
- Volume: Main volume control for all audio output.
- SD/USB Slot: For inserting SD cards or USB drives for MP3 playback.
- LED Display: Shows current mode, track information, and FM frequency.
- Function Keys (MODE, Play/Pause, Previous/Next, CH+/CH-, AUTO): Controls media playback and FM radio functions.
Rear Panel Connections:
- FM ANT: For connecting the FM antenna.
- Audio Input (AUX1, AUX2): RCA jacks for connecting external audio sources (e.g., DVD player, CD player, TV).
- Speaker System (4Ω-16Ω): Terminals for connecting passive speakers.
- DC 12V Input: For connecting a 12V DC power supply (e.g., car battery).
- 115V/230V Conversion Switch: Selects the appropriate AC voltage for your region.
- AC Power Input: For connecting the AC power cord.
5.2. Speaker Connection
The amplifier supports speakers with an impedance of 4 to 16 ohms. Ensure correct polarity when connecting speakers to avoid poor sound quality.
Figure 4: Speaker Wiring Installation Diagram
Connection Methods:
- Horizontal Clamp Connection: Connect the right and left channel main speakers to the corresponding terminals. Ensure the positive (+) and negative (-) terminals are matched.
- Terminal Connection: Expose about 1cm of copper wire from the speaker cable. Twist the exposed copper wire tightly. Unscrew the terminal cap, insert the wire into the hole, and tighten the cap. Connect red wire to positive (+) and black wire to negative (-).
- Clip Connection: Press the clip down, insert the exposed copper wire into the opening, and release the clip to secure the wire. Connect red wire to positive (+) and black wire to negative (-).
Important Notes for Speaker Connection:
- Before connecting speakers, ensure the amplifier is OFF.
- Connect speakers with an impedance between 4 and 16 ohms. Using speakers outside this range may damage the amplifier.
- Ensure correct polarity (positive to positive, negative to negative) for all speaker connections. Incorrect polarity will result in poor stereo sound.
- The total power of the speakers should match the amplifier's output capability.
- For optimal sound, use high-quality special connection wire for speakers.
Figure 5: Speaker Compatibility
5.3. Audio Input Connection
Figure 6: Product Connection Schematic
- AUX Inputs (AUX1, AUX2): Connect your DVD player, CD player, TV, or other audio sources using RCA cables to the AUX1 or AUX2 jacks on the rear panel.
- Microphone Inputs (MIC1, MIC2): Plug your microphones into the 6.35mm jacks on the front panel.
- USB/SD Card: Insert a USB disk or SD card (pre-loaded with MP3 audio files) into the respective slots on the front panel.
5.4. Power Connection
- AC Power: Ensure the 115V/230V conversion switch on the rear panel is set to the correct voltage for your region. Connect the AC power cord to the AC Power Input and then to a wall outlet.
- DC 12V Power: For car or portable use, connect a DC 12V power supply to the DC 12V Input terminals on the rear panel. Ensure correct polarity (red to positive, black to negative) to prevent damage.
6. Operating Instructions
6.1. Basic Operation
- Power On: Flip the POWER switch to the ON position. The LED display will light up.
- Volume Adjustment: Use the large VOLUME knob to adjust the overall sound level. Start with a low volume and gradually increase.
- Tone Control: Use the TREBLE and BASS knobs to adjust the high and low frequencies of the audio.
- Microphone Controls: Adjust MIC VOL for microphone volume and ECHO for the reverberation effect.
6.2. Media Playback
USB/SD Card Playback:
- Insert a USB disk or SD card into the corresponding slot.
- Press the MODE button on the front panel or remote control until "USB" or "SD" is displayed.
- The amplifier will automatically start playing MP3 files. Use the Play/Pause, Previous/Next buttons to control playback.
FM Radio:
- Connect the FM antenna to the FM ANT port on the rear panel.
- Press the MODE button until "FM" is displayed.
- Press the AUTO button to automatically scan and save available radio stations.
- Use the CH+ / CH- buttons to navigate through saved stations.
Bluetooth Connection:
Figure 7: Bluetooth Connection Flowchart
- Turn on the amplifier and press the MODE button until "BLUE" or "BT" is displayed on the LED screen. The indicator light will flash, indicating it's in pairing mode.
- On your mobile phone or Bluetooth device, go to Bluetooth settings and enable Bluetooth.
- Search for available devices. The amplifier will appear as "Bluetooth" or "BT".
- Select the amplifier from the list to connect. A successful connection will be indicated by a steady light and an audible confirmation.
- Once connected, you can play audio from your device through the amplifier. Adjust the volume on both your device and the amplifier.
6.3. Remote Control
The amplifier comes with a remote control for convenient operation. Point the remote control towards the amplifier's front panel.
Figure 8: Remote Control Functions
Figure 9: Remote Control (Updated Version)
- ON/OFF: Power on/off.
- MODE: Switches between input modes (USB, SD, FM, Bluetooth, AUX).
- EQ: Cycles through equalizer presets.
- CH+/CH-: Changes FM stations or tracks.
- Previous/Next: Skips to the previous or next track/station.
- Play/Pause: Plays or pauses media.
- Volume +/-: Adjusts the volume.
- Number Buttons (0-9): For direct song selection (USB/SD) or FM frequency input.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the amplifier's exterior. Do not use liquid cleaners or solvents.
- Ventilation: Ensure adequate ventilation around the amplifier to prevent overheating. Do not block the ventilation openings.
- Moisture: Keep the amplifier away from water and excessive humidity.
- Power Off: Always turn off the amplifier when not in use or before performing any connections or disconnections.
8. Troubleshooting
8.1. General Issues
| Problem | Possible Cause & Solution |
|---|---|
| No power | Check power cord connection. Ensure 115V/230V switch is correct. Check wall outlet. |
| No sound output | Check speaker connections and polarity. Ensure correct input mode is selected. Increase volume. Check audio source. |
| Low volume | Increase amplifier volume and source device volume. Ensure proper audio input signal strength. |
| Distorted sound | Reduce volume. Check speaker impedance (4-16Ω). Ensure speaker wires are not short-circuited. |
| Remote control not working | Check battery. Ensure no obstacles between remote and amplifier. Point directly at the amplifier's sensor. |
| Amplifier gets hot | Ensure adequate ventilation. Avoid operating at maximum volume for extended periods. This is normal for powerful amplifiers. |
8.2. Bluetooth Connection Issues
| Failure Phenomenon | Cause of Failure and Solutions |
|---|---|
| The Bluetooth function on the power amplifier has not been turned on. | Turn on the Bluetooth function on the power amplifier (the Bluetooth light is on and the BLUE/BT indication is displayed). |
| The phone could not find the Bluetooth name. | 1. Connected by another Bluetooth device. Turn off the paired and connected Bluetooth device. 2. Search distance too far from power amplifier. Search power amplifier Bluetooth in close range (search within 1 meter is recommended). 3. The configuration of the mobile phone is too low. The Bluetooth version is too low, or the Bluetooth of the mobile phone itself fails. Change to another mobile phone for testing. |
| The mobile phone Bluetooth has been connected, but there is no sound when playing music. | 1. The audio input conversion on the power amplifier failed to switch to the Bluetooth mode. Switch to Bluetooth mode. 2. The audio input conversion on the power amplifier to the USB flash drive. Switch to USB playback. 3. The music volume on the power amplifier is not turned on. Turn on the music volume on the power amplifier to the appropriate hearing position. 4. The volume of the mobile phone is too low. Turn on the volume on the handset to the maximum. 5. Mobile Phone Problem of Player Software. Replacing with Other Music Player. |
| The mobile phone Bluetooth has been connected, but there is Carton playing music. | 1. Mobile phone is too far away from power amplifier. The best distance for power amplifier to receive mobile phone Bluetooth is within 4 meters. 2. Metal objects are shielded. 30CM around the power amplifier. Remove the metal objects around the power amplifier. 3. Mobile Phone Player Online Song Carton. Mobile Phone Signal is Bad. 4. WIFI signal is weak. Close WIFI function on mobile phone to avoid Song Plays. 5. Insufficient memory or low configuration of the mobile phone. Clean up the memory of the mobile phone or replace the mobile phone with high configuration for playing. |
| The mobile phone Bluetooth has been connected, but there is only one way to play music. A sound box EQ. | 1. The BALANCE knob or EQ adjustment on the power amplifier is not adjusted correctly. Turn the power amplifier panel balance knob (BAL or BALANCE). Turn to the middle position of the knob. 2. The speaker on the power amplifier is not connected properly. Reconnect the left and right channels of the speaker cable. 3. The music function of playing software on the mobile phone is turned on and set incorrectly. Change the playing software or reinstall it. |
9. User Tips
- Start with Low Volume: This amplifier can be very powerful. Always start with the volume knob at a low setting and gradually increase to avoid sudden loud sounds or speaker damage.
- Speaker Matching: Pay close attention to speaker impedance (4-16 ohms) and power handling to ensure optimal performance and prevent damage to both the amplifier and speakers.
- Proper TV Connection: For connecting to a TV, use the dedicated RCA audio output (if available) rather than the headphone jack for better sound quality and volume levels.
- Ventilation is Key: Ensure the amplifier has ample space for airflow, especially during prolonged use, as it can generate heat.
- Check Remote Batteries: If the remote isn't responding, check and replace its batteries.
10. Frequently Asked Questions (FAQ)
- Q: Can I connect my cell phone via Bluetooth?
- A: Yes, the SUNBUCK AV-660BT supports Bluetooth 5.0 connectivity, allowing you to wirelessly stream audio from your mobile phone or other Bluetooth-enabled devices.
- Q: Can I use this amplifier to plug a turntable on Phono?
- A: The amplifier does not have a dedicated Phono input. You can connect a turntable to the AUX inputs, but you will need an external phono pre-amplifier between the turntable and the amplifier for proper sound amplification and equalization.
- Q: What is the FM range? Does USB support video format?
- A: The specific FM frequency range is not detailed in the specifications, but it supports standard FM radio reception. The USB and SD card inputs are designed for MP3 audio playback only and do not support video formats.
11. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the seller directly. Keep your purchase receipt as proof of purchase.