Woopker Digital Amplifier Decoder Board

1. Product Overview

The Woopker Digital Amplifier Decoder Board is a versatile audio module designed for DIY audio projects, offering multiple input options and sound control. It features Bluetooth connectivity, USB and TF card playback, FM radio, and adjustable treble and bass. This board can be powered by either AC 110-220V or DC 12-24V, making it suitable for various applications.

2. Features

• Plays MP3 music from TF-card, U-disk, and Bluetooth sources.
• Built-in Bluetooth Receiver for wireless audio streaming.
• Integrated FM Radio Function.
• Adjustable Treble, Bass, and Master Volume controls.
• AUX Port for connection to PC, Phone, or CD players.
• Dual input voltage support: AC 110-220V or DC 12-24V.

3. Setup Instructions

3.1. Power Wiring

1. The DC12V/24V Port can be connected to a DC 12V-24V power source. Ensure the current supply is more than 3A (e.g., from a suitable battery or power adapter).
2. The AC110-220V Port can be connected to an AC 100V-240V power source.

Warning: Please select only one connection method for power (either DC or AC), never both simultaneously!

3.2. Speaker Connection

Connect your speaker(s) to the designated Treble Port on the amplifier board. Ensure correct polarity for optimal sound quality.

4. Operating Instructions

4.1. Front Panel Controls

• LCH/RCH (Audio Input): Left and Right channel audio input.
• VOL (Volume Adjust): Controls the master volume.
• TER (Treble Adjust): Adjusts the treble level.
• BASS (Bass Adjust): Adjusts the bass level.
• USB Slot: For playing music from a USB disk.
• TF Slot: For playing music from a TF (MicroSD) card.
• V-/V+ (Previous/Next): Navigate tracks.
• PL/IR (Pause/Infrared Sensor): Pause/Play button and Infrared sensor for remote control.
• Indicator: Status indicator light.
• OFF/ON (Power Switch): Turns the amplifier on or off.
• DC12-24V: DC power input port.
• AC110-240V: AC power input port.

4.2. Remote Control Functions

• Power On/Off (A): Turns the device on or off.
• Mode Switch (B): Cycles through input modes (Bluetooth, USB, TF, FM, AUX).
• Silent Mode (C): Mutes/unmutes the audio.
• Previous / Next (D): Skips to the previous or next track/station.
• Volume Adjust (E): Increases or decreases the volume.
• Switch between TF and USB (F): Toggles between TF card and USB disk input.
• Number Keyboard (G): For direct track selection or FM frequency input.
• Play / Pause (H): Plays or pauses the current track.
• Sound Effect Adjust (I): Adjusts sound effects (e.g., EQ presets).
• Cycle Play (J): Toggles repeat modes.

4.3. Bluetooth Connection

1. Press the 'MODE' button on the amplifier or remote control to switch to Bluetooth status.
2. On your phone or other Bluetooth device, open Bluetooth settings and search for available devices.
3. Select the amplifier's Bluetooth device name (usually 'Bluetooth' or similar) to connect.
4. Once successfully paired, you can play audio wirelessly.

4.4. FM Radio Usage

1. Ensure the radio antenna is properly connected and extended.
2. Press the 'MODE' button to switch the amplifier to FM radio mode.
3. Press the 'Play' button to automatically search for and save all available radio channels.
4. Use the 'Previous' / 'Next' buttons to switch between saved stations.

Tip: This is not a professional-grade radio, so reception quality may vary. Please understand that the effect may not be optimal.

5. Maintenance

• Keep the device in a dry environment and away from direct sunlight or extreme temperatures.
• Clean the surface with a soft, dry cloth. Do not use liquid cleaners or solvents.
• Avoid dropping or subjecting the device to strong impacts.
• Ensure proper ventilation to prevent overheating.

6. Troubleshooting

• No Power: Check if the power supply is correctly connected to either the DC 12-24V or AC 110-220V port (but not both). Ensure the power switch is in the 'ON' position.
• No Sound:
  • Verify that speakers are correctly connected to the Treble Port.
  • Check the volume level on both the amplifier and the source device.
  • Ensure the correct input mode (Bluetooth, USB, TF, AUX, FM) is selected.
  • If using Bluetooth, ensure the device is properly paired.
• Intermittent, Hoarse, or Distorted Sound:
  • Before testing, turn down the master volume. After powering on, slowly increase the volume.
  • If distortion occurs as volume increases, it indicates a mismatch between the speaker and amplifier. Try using a lower volume or a different speaker that is compatible with the amplifier's impedance and power output.
• Bluetooth Pairing Issues: Ensure the amplifier is in Bluetooth mode and your device's Bluetooth is enabled and searching. Move closer to the amplifier to reduce interference.

7. Specifications

8. User Tips

• Power Source: This amplifier board does not have an internal battery. It requires an external power supply, either DC 12-24V or AC 110-220V.
• Radio Performance: The built-in FM radio is for casual listening and may not offer professional-grade reception or sound quality. For critical listening, consider external audio sources.
• Volume Adjustment: Always start with the master volume turned down before powering on and slowly increase it to prevent sudden loud noises or potential damage to speakers.
• Speaker Matching: If you experience distorted sound at higher volumes, your speaker might not be matched to the amplifier's output. Try a speaker with appropriate impedance and power handling.

9. Warranty and Support

For detailed warranty information, technical support, or further inquiries, please refer to the official product documentation or contact your retailer. A comprehensive user manual in PDF format is available for download: Woopker Digital Amplifier User Manual (PDF).