WAPUNO AK55 Digital Sound Amplifier User Manual

1. Introduction

Thank you for purchasing the WAPUNO AK55 Digital Sound Amplifier. This amplifier is designed to provide high-quality audio for both home and car environments, featuring Bluetooth 5.0 connectivity, multiple input options, and microphone support for karaoke. Please read this manual carefully before use to ensure proper operation and to maximize your listening experience.

2. Safety Information

Please observe the following safety precautions to prevent electric shock, fire, or damage to the unit:

• To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture.
• Ensure the power cord is firmly plugged into the power input.
• The package includes an EU power cord. Ensure it is compatible with your local power outlets or use an appropriate adapter.
• When used in a car (12V voltage), use the car cigarette lighter power supply. Connecting directly to the car battery may cause noise.
• When used in a truck (24V voltage), a step-down device is required to reduce the voltage to 12V. Failure to do so will burn out the power amplifier.
• Do not open the amplifier casing. Refer all servicing to qualified personnel.

3. Package Contents

Verify that all items are present in the package:

• 1x AK55 Power Amplifier
• 1x Power Cable (EU plug)
• 1x Remote Control
• 1x Radio Antenna
• 1x English User Manual

4. Product Overview

4.1 Front Panel Controls

1. Power Switch: Turns the unit on/off.
2. TF Card Interface: Insert TF (MicroSD) cards for MP3 playback.
3. USB Disk Interface: Insert USB drives for MP3 playback.
4. Function Display: Shows current mode (e.g., Bluetooth, AUX, FM).
5. BT.Aux.MP3.FM Signal Input Select Key: Cycles through input modes.
6. Upward Play Button Key: Skips to the next track/station.
7. Pause/Play Key: Plays or pauses media.
8. Down Play Button Key: Skips to the previous track/station.
9. Music Volume Control: Adjusts the main music volume.
10. Microphone Plug 2: Second 6.5mm microphone input.
11. Microphone Plug 1: First 6.5mm microphone input.
12. MIC Volume Control: Adjusts microphone volume.
13. Treble Adjustment: Adjusts high-frequency tones.
14. Bass Adjustment: Adjusts low-frequency tones.
15. Karaoke Reverberation Adjustment (Echo): Adjusts the echo effect for microphones.
16. Microphone Delay Time Adjustment: Adjusts the delay for microphone echo.

4.2 Rear Panel Connections

1. Right Channel AUX Input Signal (AUX1): RCA input for right audio channel.
2. Left Channel AUX Input Signal (AUX2): RCA input for left audio channel.
3. Right Channel Speaker Output: Connects to the right speaker.
4. Left Channel Speaker Output: Connects to the left speaker.
5. Power DC 12V/5A Input: For 12V DC power supply.
6. AC Power Input AC110-240V/50Hz-60Hz: For AC mains power supply.
7. FM Antenna: Connect the included FM antenna for radio reception.

4.3 Remote Control Functions

1. Power Key: Turns the unit on/off.
2. Repeat Key: Toggles repeat mode for media playback.
3. Signal Input Select Key (MODE): Cycles through input modes (BT, AUX, MP3, FM).
4. CH-up: Increases channel/track number.
5. CH-down: Decreases channel/track number.
6. EQ: Cycles through equalizer presets.
7. Upward Play Button Key: Skips to the next track/station.
8. Down Play Button Key: Skips to the previous track/station.
9. Pause/Play Key: Plays or pauses media.
10. Volume Reduce Key: Decreases volume.
11. Volume Add Key: Increases volume.
12. Repertoire Straight Constituency (Number Keys): Direct track/station selection.

5. Setup Instructions

5.1 Power Connection

The AK55 amplifier can be powered by either AC mains or 12V DC. Only one power method should be used at a time.

• AC Power: Connect the provided AC power cable to the AC power input (6) on the rear panel and then to a suitable wall outlet (AC 110-240V, 50Hz-60Hz).
• DC Power: For 12V DC applications (e.g., car), connect a 12V/5A DC adapter to the DC 12V/5A input (5) on the rear panel. If using in a car, use the car cigarette lighter power supply to avoid noise. For trucks (24V), a step-down device to 12V is mandatory.

5.2 Speaker Connection

Connect your passive speakers to the speaker output terminals (3 & 4) on the rear panel. Ensure correct polarity (positive to positive, negative to negative) and that your speakers have an impedance between 4-16 ohms.

5.3 Audio Input Connection

• AUX Input: Connect external audio sources (e.g., CD player, TV, PC) using RCA cables to the AUX1 (1) and AUX2 (2) inputs on the rear panel.
• USB/TF Card: Insert a USB drive into the USB disk interface (3) or a TF card into the TF card interface (2) on the front panel.
• Bluetooth: See Section 6.2 for Bluetooth pairing instructions.

5.4 FM Antenna Connection

Connect the included FM antenna to the FM antenna port (7) on the rear panel for improved radio reception.

5.5 Microphone Connection

Connect 6.5mm dynamic microphones to the MIC1 (11) or MIC2 (10) inputs on the front panel for karaoke or public address functions.

6. Operating Instructions

6.1 Power On/Off and Input Selection

1. Press the Power Switch (1) on the front panel to turn the amplifier on. The function display (4) will light up.
2. Press the Signal Input Select Key (5) on the front panel or the MODE button (3) on the remote control to cycle through available input modes: Bluetooth (BT), AUX, MP3 (USB/TF), and FM Radio.

6.2 Bluetooth Pairing

1. Select "BT" mode using the input select key. The display will show "BLUE" and flash, indicating it's in pairing mode.
2. On your device (smartphone, tablet, PC, etc.), enable Bluetooth and search for available devices.
3. Select "AK55" from the list of devices. Once connected, the "BLUE" indicator will stop flashing.
4. You can now play audio from your Bluetooth device through the amplifier.

6.3 USB/TF Card Playback

1. Insert a USB drive or TF card with MP3 audio files into the respective front panel interfaces.
2. Select "MP3" mode. The amplifier will automatically begin playing files.
3. Use the Upward Play (6), Down Play (8), and Pause/Play (7) keys on the front panel, or the corresponding buttons on the remote, to control playback.

6.4 FM Radio Operation

1. Select "FM" mode.
2. Use the Upward Play (6) and Down Play (8) keys on the front panel, or the corresponding buttons on the remote, to scan for radio stations.

6.5 Audio Adjustment

• Volume: Adjust the Music Volume Control (9) on the front panel or use the Volume Add/Reduce keys (10 & 11) on the remote.
• Tone: Use the Treble Adjustment (13) and Bass Adjustment (14) knobs on the front panel to fine-tune the audio output.
• Microphone Effects: Adjust MIC Volume Control (12), Karaoke Reverberation Adjustment (15), and Microphone Delay Time Adjustment (16) for desired microphone sound.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or solvents.
• Storage: Store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
• Ventilation: Ensure adequate ventilation around the unit to prevent overheating. Do not block ventilation openings.

8. Troubleshooting

If you encounter issues with your AK55 amplifier, refer to the following common problems and solutions:

• No Power:
  - Check if the power cable is securely connected to both the amplifier and the power outlet.
  - Ensure the power switch is in the "ON" position.
  - If using DC power, verify the 12V/5A adapter is functioning correctly.
• No Sound Output:
  - Check speaker connections for correct polarity and secure fit.
  - Ensure the volume is turned up on both the amplifier and the audio source.
  - Verify the correct input mode is selected (Bluetooth, AUX, MP3, FM).
  - Test with a different audio source or speakers to isolate the problem.
• Bluetooth Connection Issues:
  - Ensure the amplifier is in "BT" mode and discoverable.
  - Make sure your device's Bluetooth is enabled and within range.
  - Forget "AK55" from your device's Bluetooth list and try pairing again.
• Noise/Distortion:
  - If using in a car, ensure you are using the cigarette lighter power supply, not direct battery connection.
  - Check audio cables for damage or loose connections.
  - Reduce the volume of the audio source if it's too high, causing input overload.
• Microphone Not Working:
  - Ensure microphones are 6.5mm dynamic microphones.
  - Check microphone cable connections.
  - Adjust the MIC Volume Control (12) on the front panel.

If the problem persists, please consult the official seller for further assistance.

9. Specifications

10. User Tips

• For optimal sound quality, ensure your speakers match the recommended impedance range of 4-16 ohms.
• When using the amplifier in a car, always use the car cigarette lighter power supply to minimize potential noise interference.
• If you plan to use microphones, ensure they are 6.5mm dynamic microphones for compatibility.
• Experiment with the Treble, Bass, Echo, and Mic Delay controls to customize your audio and karaoke experience.
• Keep the remote control within line of sight of the amplifier for reliable operation.

11. Warranty and Support

For specific warranty information and technical support, please refer to the official seller or the product listing where you purchased the AK55 amplifier. A digital version of this user manual is available for download as a PDF document for your convenience.