Sunbuck AV-326BT

Contents

Sunbuck Bluetooth Audio Power Amplifier User Manual

Models: AV-660BT, AV-326BT, AV-628BT Series

1. Introduction

Thank you for choosing the Sunbuck Audio Power Amplifier. This product is designed to provide a clear and full sound quality experience across various scenarios, including home entertainment, small gatherings, conference presentations, and car use. It integrates multiple functions such as Bluetooth connectivity, FM radio, multi-interface input, and comprehensive sound effect adjustments.

This manual will detail the product's parameters, functions, operation steps, and maintenance points. Please read it carefully before use to familiarize yourself with the amplifier's capabilities and ensure proper operation, which will help extend the product's service life.

Sunbuck Multi-Function High-Power Amplifier
Figure 1: Sunbuck Multi-Function High-Power Amplifier (AV-326BT model shown)
Sunbuck Audio Power Amplifier in various usage scenarios
Figure 2: Amplifier suitable for Karaoke, Radio, Stage, and TV home theater use.

2. Safety Preparation

  1. Voltage Compatibility: Before use, confirm that the power supply voltage matches the voltage marked on the amplifier (115V/230V). If voltage switching is required, operate according to the instructions on the unit to prevent damage. For car use, connect to a DC12V power supply, ensuring correct positive and negative pole connections.
  2. Placement: Place the amplifier in a ventilated, dry, and cool area, away from high temperatures, humidity, flammable, and explosive materials. Avoid direct sunlight and ensure adequate heat dissipation space to prevent overheating.
  3. Connection Sequence: Always ensure the amplifier and all related devices are turned off before making any connections to prevent short circuits or equipment damage.
  4. No Unauthorized Disassembly: Do not disassemble or modify the amplifier yourself. It contains high-voltage circuits, and unauthorized disassembly may cause electric shock or further damage. If the equipment fails, contact professional after-sales service personnel.
  5. Cleaning: Disconnect the power supply before cleaning. Wipe the body with a dry, soft cloth. Do not use wet cloths, alcohol, gasoline, or other chemical cleaners, which can damage the product surface or internal circuits.
  6. Prevent Foreign Objects: Do not allow liquids, metal objects, or other foreign objects to enter the amplifier to avoid short circuits, electric shocks, or other accidents. If foreign objects fall inside, immediately disconnect the power supply and contact after-sales service.
  7. Microphone Usage: When using a microphone, do not place it too close to the speaker to prevent howling. Avoid strong impacts on the microphone to prevent damage.
  8. Speaker Impedance: The standard impedance of the amplifier is 4-16 ohms. Do not connect speakers with mismatched impedance to avoid amplifier overload, sound quality degradation, or equipment damage.
  9. Child Safety: When children use this product, adult supervision is required to prevent misoperation or contact with internal circuits. Keep small accessories, such as remote controls, out of reach of children to prevent accidental ingestion.

3. Setup

3.1 Power Connection

  • Fixed Scenarios (Home/Meeting): Connect the power cord to the amplifier's power interface. Set the voltage switch on the unit to 115V or 230V according to your local voltage standard, then plug the power cord into the appropriate power socket.
  • Car Scenario: Use a dedicated DC12V power cord. Connect one end to the amplifier's DC12V interface and the other end to the car's cigarette lighter or power interface, ensuring a secure connection.

3.2 Speaker Connection

Select speakers with an impedance of 4-16 ohms. Connect the amplifier to the speakers using qualified speaker wires. Pay close attention to polarity: connect the "+" terminal of the amplifier output to the "+" terminal of the speaker, and the "-" terminal of the amplifier output to the "-" terminal of the speaker. Incorrect polarity can cause sound phase issues. Ensure all speaker wire connections are firm and that no bare copper wire is exposed to prevent short circuits.

3.3 Audio Input Device Connection

  • DVD Input: Use an audio cable to connect the audio output of your DVD player to the DVD input interface on the amplifier.
  • AUX Input: Use an AUX audio cable to connect the headphone or audio output of devices like mobile phones, computers, or TVs to the AUX input interface on the amplifier.
  • USB/SD Card Connection: Insert a USB flash drive (max 64GB) with audio files into the USB interface, or an SD card (max 64GB) into the SD card interface. The amplifier will automatically detect and play audio files from the storage device (supports common audio formats).
  • Microphone Connection: Insert microphones into the microphone input interfaces (up to 4 channels supported on some models) for speech or karaoke. Volume, reverb, and delay effects for microphones can be adjusted via the front panel knobs.
Wiring diagram for connecting various equipment to the amplifier
Figure 3: Connectable Equipment Diagram (AV-326BT rear panel shown)
Rear panel connections for AV-628BT amplifier
Figure 4: Rear Panel Connections for AV-628BT, showing audio input/output, speaker system, and power input.

3.4 Bluetooth Connection

  • Enter Pairing Mode: Turn on the amplifier. Press the "Bluetooth" button on the unit or remote control to enter Bluetooth pairing mode. The Bluetooth indicator light will flash.
  • Pairing: On your Bluetooth device (e.g., mobile phone, tablet), enable Bluetooth, search for "SUNBUCK AV-660BT" (or similar model name), and select it to pair.
  • Successful Connection: Once paired, the Bluetooth indicator light will stop flashing and remain solid. Audio can now be played from your Bluetooth device through the amplifier. The device will automatically reconnect next time it's turned on within effective range.
Diagram showing Bluetooth connection with various devices
Figure 5: Built-in Bluetooth connectivity for Android/iOS phones, tablets, and laptops.

4. Operation

4.1 Power On/Off

  • Power On: Toggle the power switch to the "ON" position. The amplifier will power on, and the indicator light will illuminate. It is recommended to set the volume to minimum before powering on to avoid sudden loud noise.
  • Power Off: After use, turn the volume to minimum, then toggle the power switch to the "OFF" position. For extended periods of non-use, unplug the power cord.

4.2 Volume and Sound Effect Adjustment

  • Volume Adjustment: Adjust the overall volume using the "Volume +" and "Volume -" buttons on the unit or remote control. Rotate clockwise to increase, counter-clockwise to decrease.
  • EQ Adjustment: Use the 5-band EQ mixer knobs on the unit to adjust the sound quality of different frequency bands (bass, midrange, treble) to suit personal preferences and audio types.
  • Reverb and Balance Adjustment: Adjust the reverb effect and left/right channel balance using the "Reverb" and "Balance" knobs. Separate knobs are available for microphone reverb and delay effects.

4.3 FM Radio Operation

  • Enter FM Mode: Press the "FM" button on the unit or remote control.
  • Search Channels: Rotate the "FM Tuning" knob on the unit to search for local FM radio programs. Stop rotating when a clear channel is found. You can also use the "FM +" and "FM -" buttons on the remote control for precise channel searching.
  • Exit FM Mode: Press the "FM" button again to switch to other playback modes.

4.4 Playback Mode Switching

Switch between DVD, AUX, USB, SD, Bluetooth, FM, and other playback modes by pressing the "Mode" button on the unit or remote control. The LED display will show the current mode.

4.5 Remote Control Functions

The included remote control allows for convenient long-distance operation of the amplifier's power, volume, function switching, and sound effect adjustments.

Diagram of the remote control buttons and their functions
Figure 6: Remote Control Button Functions. Key functions include Player standby/power, channel navigation, volume control, function button, pause/play, mode, recycle, and EQ effect.
Front and Rear Panel Indicator Diagram for AV-326BT
Figure 7: Front and Rear Panel Indicator Diagram (AV-326BT). Labels include Power ON/OFF, MIC Inputs, MIC/TREBLE/BASS/BALANCE adjustments, SD Input, LED Display, USB Disk, MIC VOL, MUSIC VOL, Audio Input/Output, Speaker System, and Power Input.
Front panel function description for AV-628BT
Figure 8: AV-628BT Function Description. Includes Power switch, USB disk socket, Mic jack, Volume adjustment, Music bass/treble, Constant sound switch, Left/right balance, Loop Playback, Previous/Next song, Play/Pause, Function selection, Microphone volume/bass/treble/reverberation.

5. Maintenance and Care

  • Daily Cleaning: Regularly wipe the surface of the unit with a dry and soft cloth to remove dust. Avoid using wet cloths or chemical cleaners to prevent damage to the casing and internal circuits.
  • Storage: If the amplifier will not be used for an extended period, disconnect the power supply. Store it in a dry, ventilated, and cool place to prevent moisture and dust accumulation. Cover the unit with a dust cloth to keep dust out.
  • Interface Maintenance: Periodically check all interfaces. If dust or debris is present, gently wipe with a dry cotton swab to ensure smooth connections. Avoid forcing plugs into interfaces to prevent damage.
  • Avoid Overload: Do not operate the amplifier at maximum volume for prolonged periods, as this can lead to overheating and damage. Ensure that connected speakers have appropriate power ratings to match the amplifier's impedance.

6. Troubleshooting

Common Problem Solution
Amplifier cannot be turned on
  1. Check if the power cord is firmly connected and if the power socket is live.
  2. Confirm that the power supply voltage matches the voltage marked on the amplifier.
  3. If the power switch is damaged, contact after-sales service.
No sound output
  1. Check if the volume is set to minimum or mute mode.
  2. Ensure speakers and audio devices are firmly connected, and positive/negative poles are correct.
  3. Switch playback mode and confirm it matches the connected device.
  4. For USB/SD, check if the card contains audio files and if the file format is supported.
  5. If no sound from microphone, check microphone connection and ensure microphone is functional.
Bluetooth cannot be paired or connected
  1. Confirm amplifier is in Bluetooth pairing mode (indicator light flashing).
  2. Check if Bluetooth is enabled on your device and within 10 meters (no obstacles).
  3. Close other pairing connections on your Bluetooth device and search again.
  4. Restart amplifier and Bluetooth device, then try pairing again.
FM radio has no signal or poor signal
  1. Confirm amplifier is in FM radio mode.
  2. Adjust amplifier position, move away from obstacles (walls, metal objects), and retune.
  3. Check for external interference (other electronic devices) and try again after moving away from interference sources.
Sound quality distortion and noise
  1. Check if volume is too high, exceeding rated power.
  2. Check for loose or poor connections of audio devices and speakers.
  3. Adjust EQ knobs to optimize sound quality.
  4. If microphone noise, check proximity to speaker or adjust microphone reverb/delay effects.
USB/SD card cannot be recognized
  1. Check if storage device capacity exceeds 64GB (not supported).
  2. Verify storage device is functional by testing on other devices.
  3. Re-plug USB/SD card to ensure firm connection.
  4. Format the storage device to FAT32 and try again.

7. Specifications

Parameter Specification
Model AV-660BT (also applies to AV-326BT, AV-628BT series)
Color Black, White
Dimensions (L×W×H) 200 × 70 × 190 mm / 7.9 × 2.8 × 7.5 inches (AV-660BT)
260 × 290 × 100 mm / 10 × 11.4 × 4 inches (AV-326BT)
Power Supply Voltage 115V/230V AC conversion, DC12V
Rated Power 400W (AV-660BT), 1200W (AV-326BT)
Peak Power 800W (AV-660BT), 2000W (AV-326BT)
Rated Frequency Response 20Hz - 20KHz
Signal-to-Noise Ratio ≥90dB
Standard Impedance 4 to 16 ohm
Amplifier Type AV Power Amplifier
Channels 2.0 Channel (AV-660BT/AV-326BT), 5 Sound Channel (AV-628BT)
Total Harmonic Distortion ≤ 0.5%
Signal Input Sensitivity 200mv (± 30mv)
Microphone Input Sensitivity 9 mv (± 2mv)
Recording Level Output 1V
Auxiliary Level Output 1V
Storage Support USB Disk / Max 64GB SD Card (Not included)
Bluetooth Version 5.0
Microphone Inputs 4-way (AV-326BT), 2-way (AV-660BT)
EQ Mixer 5-band

Note: Specifications may vary slightly between models (AV-660BT, AV-326BT, AV-628BT). The information above combines details from various sources for the series.

8. User Tips

  • For optimal sound, ensure all audio cables are securely connected and not damaged.
  • Experiment with the EQ and microphone effects to find the best sound for your environment and preferences.
  • When using USB/SD card playback, ensure your audio files are in common formats and the storage device is formatted to FAT32.
  • Keep the remote control in a safe place and ensure batteries are replaced when needed for uninterrupted control.

9. Frequently Asked Questions (FAQ)

Q: Can I connect multiple microphones simultaneously?
A: Yes, the amplifier supports multiple microphone inputs (e.g., 4-way on AV-326BT, 2-way on AV-660BT), allowing for multi-person speech or karaoke.
Q: What type of speakers are compatible?
A: The amplifier is compatible with speakers having an impedance of 4 to 16 ohms.
Q: Is a USB flash drive or SD card included?
A: No, USB disks and SD cards (max 64GB) are not included and must be purchased separately.
Q: How do I switch between 115V and 230V?
A: There is a voltage switch on the body of the amplifier. Please ensure it is set correctly for your local power supply before connecting.

10. Warranty and Support

For any questions, technical support, or warranty claims, please refer to the contact information provided by your seller or contact their after-sales service department. Please have your product model and purchase details ready when contacting support.

A user manual in PDF format is also available for download: View User Manual (PDF)

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