1. Introduction
This manual provides detailed instructions for the safe and efficient operation of your Sunbuck 2000W Home Car Amplifier. This versatile 2-channel amplifier features Bluetooth 5.0 connectivity, FM radio, USB/SD card playback, multiple microphone inputs, and a 5-band EQ mixer, making it suitable for various audio applications in both home and car environments. Please read this manual thoroughly before use and retain it for future reference.
2. Important Safety Information
- Do not expose this appliance to rain or moisture.
- Do not open the amplifier casing; there are no user-serviceable parts inside. Refer all servicing to qualified personnel.
- Ensure proper ventilation around the unit to prevent overheating.
- Disconnect power before making any connections or disconnections.
- Use only the specified power supply (AC 110V/220V 50/60Hz or DC12V).
- Keep out of reach of children.
3. Package Contents
Upon opening the package, please verify that all items listed below are present and in good condition.

- 1 x Audio Power Amplifier
- 1 x Remote Control
- 1 x Power Cord (EU Plug 220V, specific to model/region)
- 1 x User Manual
4. Product Overview
The Sunbuck amplifier is designed for versatile audio applications. Below are diagrams illustrating the front and rear panels with their respective controls and connections.

4.1 Front Panel Controls and Indicators
- Power ON / OFF: Main power switch.
- MIC Input (MIC1-MIC4): 1/4" jack inputs for microphones.
- MIC Adjustment: Controls for microphone volume, treble, mid, bass, echo, and delay.
- TREBLE: Adjusts high-frequency audio.
- BASS: Adjusts low-frequency audio.
- Balance: Adjusts the balance between left and right channels.
- MUSIC VOL: Master volume control for music.
- Balance Adjustment: Fine-tunes left/right channel balance.
- AUX: Auxiliary input selector.
- SD Input: Slot for SD memory cards.
- USB Disk: USB port for flash drives.
- LED Display: Digital display for mode, track information, and FM frequency.
4.2 Rear Panel Connections
- Audio Input (A, B, LINE): RCA inputs for external audio sources (DVD, CD, etc.).
- Audio Output (L, R): RCA outputs to connect to other audio equipment or active subwoofers.
- Speaker System (R, L): Binding posts for connecting passive speakers.
- DC 12V Input: Power input for 12V DC supply (e.g., car battery).
- AC Power Input: Standard AC power input (110V/220V switchable).
- FM ANT: FM antenna connection.
5. Specifications
Below are the technical specifications for the Sunbuck Home Car Amplifier (Model 336BU). Note that specifications for other models (e.g., AV-516BT, 326BT, 501BT, 660BT) may vary slightly in size and specific features.

| Feature | Specification (Model 336BU) |
|---|---|
| Model | 336BU |
| Size | 290×95×240mm (11.4x3.7x9.4 inches) |
| Rated Voltage | AC 110V/220V 50/60Hz, DC12V |
| Rated Power | 1200W |
| Peak Power | 5000W |
| 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 (Not included) |
| Color | Black |
5.1 Other Models (AV-516BT, 326BT, 501BT, 660BT)
While the core features are similar, some models may have slight variations. For example, the AV-516BT model has a size of 250×55×168mm (9.8x2.2x6.6 inches) and uses an eight-suffix power socket input, allowing for easier matching with different power cords. All models support Bluetooth 5.0, FM radio, 5-band EQ mixer, and microphone reverb/delay adjustment.
6. Setup Guide
Follow these steps to correctly set up your amplifier. Ensure the amplifier is powered off before making any connections.

6.1 Connecting Speakers
- Connect your passive speakers to the "SPEAKER SYSTEM" binding posts on the rear panel. Ensure correct polarity (red to red, black to black for R and L channels).
- The amplifier supports speakers with an impedance of 4 to 16 ohms.

6.2 Connecting Audio Sources
- DVD/CD Player or Computer: Use RCA cables to connect the audio output of your device to the "AUDIO INPUT" (A or B) on the rear panel.
- External Audio Equipment: For other line-level sources, use the "LINE" input.
- Microphones: Plug up to four microphones into the 1/4" "MIC Input" jacks on the front panel.
6.3 Power Connection
- AC Power: Connect the provided power cord to the "AC POWER INPUT" on the rear panel and then to a suitable wall outlet (110V/220V, ensure the voltage switch is set correctly if applicable).
- DC 12V Power (Car Use): For car applications, connect a DC 12V power source (e.g., car battery) to the "DC 12V INPUT" terminals on the rear panel. Ensure correct polarity.
7. Operating Instructions
This section details how to use the various functions of your amplifier.
Video 7.1: Product Unboxing and Feature Demonstration
7.1 Powering On/Off
- After all connections are made, press the "Power ON / OFF" switch on the front panel to turn on the amplifier. The LED display will illuminate.
- To turn off, press the switch again.
7.2 Selecting Input Source
- Use the "INPUT" button on the front panel or the remote control to cycle through available input sources: AUX, USB, SD, FM, and Bluetooth. The selected mode will be shown on the LED display.
7.3 Bluetooth Operation
- Select "Bluetooth" mode using the INPUT button. The LED display will show "BLUE".
- On your mobile device, search for Bluetooth devices and select "Sunbuck" or a similar name.
- Once paired, you can play audio from your device through the amplifier.
7.4 USB/SD Card Playback
- Insert a USB flash drive into the "USB Disk" port or an SD card into the "SD Input" slot.
- The amplifier will automatically switch to USB/SD mode and begin playing supported audio files.
- Use the playback controls (Play/Pause, Next, Previous) on the front panel or remote control.
7.5 FM Radio
- Select "FM" mode using the INPUT button.
- Extend the FM antenna on the rear panel for better reception.
- Use the "SCAN" button (or similar on remote) to auto-scan and save available radio stations.
- Use the "PREV" and "NEXT" buttons to navigate through saved stations.
7.6 Microphone and Karaoke Functions
- Adjust individual microphone volumes using the "MIC1 VOL" to "MIC4 VOL" knobs.
- Use the "ECHO" and "DELAY" controls to add effects to the microphone sound.
- Adjust "TREBLE", "MID", and "BASS" for microphone tone.
7.7 Audio Adjustment (EQ Mixer)
- The amplifier features a 5-band EQ mixer for both left and right channels. Use the sliders to fine-tune the frequency response of your audio.
- Adjust the "TREBLE", "BASS", and "BALANCE" knobs for overall music tone and channel balance.
8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or solvents.
- Ventilation: Ensure that the ventilation openings on the amplifier are not blocked 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.
9. Troubleshooting
If you encounter any issues with your amplifier, please refer to the following common problems and solutions before seeking professional assistance.
| Problem | Possible Cause / Solution |
|---|---|
| No power |
|
| No sound output |
|
| Bluetooth not connecting |
|
| USB/SD card not playing |
|
| Poor FM reception |
|
10. User Tips
- Voltage Compatibility: The amplifier supports both AC 110V/220V and DC 12V. When using AC power, ensure the voltage switch (if present) is set to match your local power supply to prevent damage.
- Microphone Port Care: Some users have reported issues with microphone ports over time. To prolong their lifespan, handle microphone cables gently when plugging and unplugging, and avoid excessive force or strain on the ports.
- Speaker Matching: For optimal sound quality, ensure your speakers' impedance (4-16 ohms) matches the amplifier's specifications.
- Equalizer Use: Experiment with the 5-band EQ mixer to tailor the sound to your preference and room acoustics. Small adjustments can make a big difference.
11. Warranty and Support
For any questions, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
12. Scope of Application
This amplifier is designed for a wide range of audio applications, including:

- Home audio systems
- Car audio systems (including New Energy Vehicles, Petrol cars, and Trucks)
- Small parties and karaoke events
- General entertainment setups





