1. Introduction
The Daakro ZK-1001B is a 100W mono channel Bluetooth amplifier board designed for DIY audio projects, including wireless speakers. It features TWS (True Wireless Stereo) pairing, multiple audio input options (Bluetooth, AUX, USB), and intuitive knob controls for volume, treble, and bass. This manual provides detailed instructions for setting up, operating, and maintaining your amplifier board.
2. What's in the Box
Upon opening the package, you should find the following components:
- Amplifier Board
- Knob caps (for volume, treble, bass)
- Screwdriver
- Power input cable
- Mounting hardware (spacers, screws)
- Protective plates
3. Product Overview
The ZK-1001B amplifier board integrates a TPA3116D2 HiFi chip and Bluetooth 5.1 for high-fidelity audio. It includes controls for treble, bass, and volume, along with multiple input ports.
Controls
- Volume Knob: Adjusts overall sound level. Also functions as a multi-function button (single click for play/pause, double click for next track, triple click for TWS mode, long press for power ON/OFF).
- Bass Knob: Adjusts low-frequency audio.
- Treble Knob: Adjusts high-frequency audio.
Inputs and Outputs
- DC 7-24V Power Input: For connecting the power supply.
- Speaker Output: Connects to a single speaker (mono channel).
- USB-IN: For USB flash drive audio playback or as a USB sound card.
- AUX-IN: 3.5mm audio jack for wired audio input.
Indicators
- WORK Indicator: Shows operational status.
- TWS Indicator: Shows TWS pairing status.
4. Setup Instructions
- Unpack Components: Carefully remove all items from the packaging.
- Attach Heat Sink: If not pre-attached, remove the backing adhesive from the heat sink and firmly press it onto the TPA3116D2 chip on the amplifier board.
- Install Knobs: Place the silver knob caps onto the volume, bass, and treble shafts.
- Mount Protective Plates: Use the provided spacers and screws to attach the top and bottom protective plates to the amplifier board. Ensure all ports and controls are accessible.
- Connect Speaker: Connect your speaker (3-8Ω, 20-100W) to the "SPEAKER +" and "SPEAKER -" terminals.
- Connect Power: Connect a DC 7-24V power supply to the DC power input jack. Ensure correct polarity. A 12V or 24V adapter is suitable. For portable use, a 12V battery can be used.
5. Operating Instructions
- Power On: Long press the volume knob to power on the amplifier board. The WORK indicator light will illuminate.
- Select Input Mode:
- Bluetooth Mode: The board will automatically enter Bluetooth pairing mode. Search for "ZK-1001B" on your device and connect.
- AUX Mode: Connect an audio source (e.g., TV, computer, phone) to the 3.5mm AUX-IN jack. The board will automatically switch to AUX input.
- USB Mode: Insert a USB flash drive with audio files into the USB-IN port. The board will play audio from the USB drive. It can also function as a USB sound card when connected to a computer.
- Adjust Audio:
- Volume: Rotate the volume knob to increase or decrease the sound level.
- Play/Pause: Single click the volume knob to play or pause audio.
- Next Track: Double click the volume knob to skip to the next track (in Bluetooth or USB mode).
- Treble/Bass: Rotate the respective knobs to adjust high and low frequencies.
- Power Off: Long press the volume knob to power off the amplifier board.
6. TWS Pairing Function (True Wireless Stereo)
The ZK-1001B supports TWS pairing, allowing two ZK-1001B boards to function as left and right stereo channels for a wider soundstage.
- Prepare Two Boards: Ensure both ZK-1001B amplifier boards are powered on and not connected to any Bluetooth device.
- Enter TWS Mode: On one of the boards, triple click the volume knob. The TWS indicator light will flash, indicating it's searching for another board.
- Pairing: The two boards will automatically pair. Once paired, one board will act as the left channel and the other as the right channel. The TWS indicator lights on both boards will show a steady state (e.g., solid light or a different flashing pattern).
- Connect Bluetooth: Connect your Bluetooth device to the primary amplifier board (the one you initiated TWS pairing on).
- Exit TWS Mode: Triple click the volume knob again on either board to exit TWS mode.
7. Audio Input Modes
The Daakro ZK-1001B offers versatile audio input options:
- Bluetooth 5.1: Wireless connection for smartphones, tablets, and other Bluetooth-enabled devices. Provides a stable connection up to 16.4 feet (5 meters).
- 3.5mm AUX Input: For wired connection to devices like TVs, computers, MP3 players, or other audio sources.
- USB Flash Drive: Directly play audio files from a USB flash drive.
- USB Sound Card: Connect the board to a computer via USB to use it as an external sound card, enhancing audio output quality.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | ZK-1001B |
| Brand | Daakro |
| Mounting Type | Board/Module |
| Input Voltage | DC 7-24 Volts |
| Number of Channels | 1 (Mono) |
| Output Power | Up to 100W (depending on input voltage and speaker impedance) |
| Speaker Impedance | 3-8Ω (recommended 4Ω) |
| Bluetooth Version | 5.1 |
| Bluetooth Range | Up to 16.4 feet (5 meters) |
| Audio Inputs | Bluetooth, AUX (3.5mm), USB Flash Drive, USB Sound Card |
| Package Dimensions | 4.41 x 2.64 x 2.05 inches |
| Item Weight | 3.53 ounces |
Power Output Comparison Table
| Input Voltage | Speaker Impedance | Output Power |
|---|---|---|
| 12V | 4Ω | 30W |
| 8Ω | 10W | |
| 15V | 4Ω | 50W |
| 8Ω | 20W | |
| 19V | 4Ω | 70W |
| 8Ω | 30W | |
| 24V | 4Ω | 100W |
| 8Ω | 50W |
Note: Ensure sufficient voltage and current input for optimal power output. Higher voltage and current generally result in higher power. For the same conditions, a smaller speaker impedance yields greater power.
9. Maintenance
- Keep the amplifier board clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the board to moisture, extreme temperatures, or direct sunlight.
- Ensure proper ventilation to prevent overheating, especially during prolonged use at high volumes.
- Do not attempt to modify the circuit board, as this may void the warranty and cause damage.
10. Troubleshooting
No Power
- Check if the power supply is correctly connected and providing the specified DC 7-24V.
- Ensure the power adapter is functional.
- Verify the volume knob is long-pressed to turn on the device.
No Sound
- Check speaker connections for correct polarity and secure fit.
- Ensure the volume is turned up on both the amplifier board and the audio source.
- Verify the correct audio input mode is selected (Bluetooth, AUX, USB).
- If using Bluetooth, ensure the device is properly paired and connected.
- If using AUX, check the audio cable for damage and ensure it's fully inserted.
- If using USB, ensure the USB drive is formatted correctly and contains compatible audio files.
Distorted Sound
- Reduce the volume on both the amplifier board and the audio source.
- Check speaker impedance compatibility (3-8Ω).
- Ensure the power supply provides adequate current for the desired output power.
- Inspect speaker wires for shorts or damage.
Bluetooth Disconnection
- Ensure the Bluetooth device is within the 16.4 feet (5 meters) range.
- Check for interference from other wireless devices.
- Try re-pairing the Bluetooth device.
TWS Pairing Issues
- Ensure both ZK-1001B boards are the same model and are not already connected to another Bluetooth device.
- Follow the triple-click procedure carefully on one board to initiate pairing.
- Ensure both boards are within close proximity during pairing.
11. Warranty and Support
Daakro is committed to providing high-quality audio equipment.
- Warranty: The product typically comes with a 30-day warranty. Please refer to your purchase documentation for specific terms.
- Customer Service: Online customer service is available for support.
- Contact: For any issues or inquiries, please contact Daakro customer support through the platform of purchase or visit the official Daakro store for more information.
