Aihjcnele CT14
CT14 Micro 4.2 Stereo Power Amplifier Board User Manual
Model: CT14 | Brand: Aihjcnele
Product Overview
The Aihjcnele CT14 Micro 4.2 Stereo Power Amplifier Board is a compact audio module designed for DIY sound box and speaker refitting projects. It features Bluetooth 4.2 connectivity and delivers 5W+5W stereo output, making it suitable for various audio modification applications.
Image: A person working on an electronic project, symbolizing the DIY nature of the amplifier board.
Important Safety Warnings
Please read and adhere to the following warnings to prevent damage to the product and ensure safe operation:
- This product cannot be used together with other power amplifiers.
- The two power amplifier outputs of this product cannot be connected in parallel.
- The output negative pole of the power amplifier of this product cannot be connected together.
- Wrong operation will lead to product failure, and wrong operation will destroy the product chip.
Components and Features
Image: The CT14 amplifier board with key components labeled, including Micro USB Charging Interface, Bluetooth Antenna, and Working Status Indicator.
Key Components
- Micro USB Charging Interface: Used for power input and charging (if connected to a battery).
- Bluetooth Antenna: Integrated antenna for wireless Bluetooth connectivity.
- Working Status Indicator: LED light indicating the operational status of the module.
- Audio Output Terminals (Lout+, Lout-, Rout+, Rout-): Connections for left and right channel speakers.
- Battery Input Terminals (BAT+, BAT-): Connections for a DC 3.7V-5V power source, typically a lithium battery.
Technical Specifications
| Feature | Detail |
|---|---|
| Model Number | CT14 |
| Bluetooth Version | BT 4.2 |
| Output Power | 5W + 5W (Class F) |
| Operating Power Supply | DC 3.7V ~ 5V |
| Maximum Operating Power Supply | 5V 2A |
| Transmission Distance | Approximately 15 meters (unobstructed) |
| Number of Channels | 2 (Stereo) |
| Main Board Material | Metal |
| Dimensions (L x W x H) | 41mm x 20mm x 11.5mm (approx.) |
Image: The CT14 amplifier board showing its compact dimensions: 41mm length, 20mm width, and 11.5mm height.
Setup Instructions
Power and Speaker Connections
- Connect Speakers: Connect your 4ohm 5W speakers to the Lout+, Lout- (Left Channel) and Rout+, Rout- (Right Channel) terminals. Ensure correct polarity.
- Connect Power: Connect a DC 3.7V-5V power source (e.g., a recommended 3.7V lithium battery or a 5V USB power supply) to the BAT+ and BAT- terminals. The Micro USB port can also be used for 5V power input.
Image: A diagram illustrating the correct connections for 4ohm 5W speakers to the Lout/Rout terminals and a DC 3.7V-5V power source to the BAT terminals on the CT14 amplifier board.
Charging Interface Note
The charging interface of this product is in current-limiting charging mode, without charging management. Please be sure to use a lithium battery with a protective plate made by a regular manufacturer.
Image: The CT14 amplifier board with text overlay highlighting important notes regarding the charging interface and compatibility with other amplifiers.
Operating Instructions
Bluetooth Pairing
- Power On: Once the power supply is connected, the module will automatically power on. The working status indicator LED will illuminate.
- Enable Bluetooth: On your mobile phone or audio device, turn on Bluetooth.
- Scan for Devices: Scan for available Bluetooth devices.
- Connect: Locate and select "DW-CT14+" or "JZ-B5W2" from the list of devices. Click to connect.
- Playback: Once connected, you can play audio through the amplifier board.
Image: The CT14 amplifier board with text overlay demonstrating the Bluetooth 4.2 operation and pairing instructions.
Maintenance
The CT14 amplifier board is designed for durability. To ensure its longevity:
- Keep the module in a dry environment, away from moisture and extreme temperatures.
- Avoid exposing the board to static electricity.
- Do not attempt to modify the circuit beyond the intended connections.
- Ensure proper ventilation if enclosed in a case.
Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| No power / Indicator off | Check power supply connection and voltage (DC 3.7V-5V). Ensure Micro USB cable or battery is properly connected. |
| No sound / Distorted sound | Verify speaker connections and polarity. Ensure speakers are 4ohm 5W. Check Bluetooth connection status. Adjust volume on the connected device. |
| Cannot find Bluetooth device | Ensure the module is powered on. Move closer to the module (within 15 meters). Restart Bluetooth on your device. |
| Module gets hot | Ensure proper ventilation. Verify speaker impedance and power rating. Avoid short circuits. |
| Module damaged after connection | Review the "Important Safety Warnings" section. Incorrect wiring (e.g., parallel output connection, connected negative poles) can cause damage. |
Warranty and Support
For warranty information and technical support, please refer to the product's purchase page or contact the seller directly. Keep your proof of purchase for any warranty claims.