Description
TB21+APP 2.1 Channel Bluetooth Amplifier Board with APP Control
The TB21+APP 2.1 Channel Bluetooth Audio Amplifier Board is a versatile audio amplification solution designed for DIY speaker systems, home audio projects and custom multimedia setups. Its 2.1-channel configuration supports two stereo speaker outputs along with a dedicated subwoofer output for enhanced bass performance.
Featuring Bluetooth wireless connectivity and APP-based control, this amplifier board offers convenient audio playback and management. It also supports AUX audio input, providing flexibility when connecting compatible audio sources.
The board operates with a 12V to 24V DC power supply and features a compact PCB design that makes it suitable for custom speaker enclosures and DIY audio installations.
Whether you are building a Bluetooth speaker system or upgrading a custom 2.1-channel audio setup, the TB21+APP amplifier board provides a practical platform for your audio project.
Package Includes:
-
1 × TB21+APP 2.1 Channel Bluetooth Audio Amplifier Board
Note: Power supply, speakers and other accessories are not included unless specified separately.
Key Features
-
2.1 Channel Audio Output: Supports left, right and dedicated subwoofer channels.
-
Bluetooth Connectivity: Enables wireless audio streaming from compatible devices.
-
APP-Based Control: Supports audio management through a compatible mobile application.
-
AUX Audio Input: Provides an additional wired audio input option.
-
Stereo Speaker Output: Designed for connecting left and right channel speakers.
-
Dedicated Subwoofer Output: Supports a separate subwoofer channel for bass reproduction.
-
Compact PCB Design: Suitable for DIY speaker enclosures and custom audio installations.
-
12V–24V DC Operation: Supports a range of compatible DC power supply voltages.
Technical Specifications
| Specification | Details |
|---|---|
| Product Model | TB21+APP |
| Product Type | Bluetooth Audio Amplifier Board |
| Amplifier Configuration | 2.1 Channel |
| Amplifier IC | TPA3116D2 (Version-dependent; confirm actual board) |
| Audio Input | Bluetooth / AUX |
| Audio Output | 2 Stereo Channels + 1 Subwoofer Channel |
| Output Channels | Left, Right & Subwoofer |
| Operating Voltage | 12V–24V DC |
| Wireless Connectivity | Bluetooth |
| Control Method | Mobile APP / Onboard Controls |
| Bass & Treble Adjustment | Version-dependent |
| Rated Output Power | Not Specified – Refer to Manufacturer Specifications |
| PCB Design | Compact Printed Circuit Board |
| Package Includes | 1 × TB21+APP Amplifier Board |
Applications
-
DIY Bluetooth speaker systems.
-
Custom 2.1-channel home audio systems.
-
Multimedia speaker projects.
-
Stereo speaker and subwoofer setups.
-
DIY subwoofer amplifier projects.
-
Custom audio enclosure installations.
-
Electronics and audio experimentation.
Precautions
-
Use a regulated 12V–24V DC power supply compatible with the board.
-
Check the power supply polarity before connecting it.
-
Do not exceed the board's specified input voltage.
-
Ensure speaker impedance and power ratings are compatible with the amplifier.
-
Connect speakers to the correct left, right and subwoofer output terminals.
-
Avoid short circuits at the speaker output terminals.
-
Provide adequate ventilation during operation.
-
Disconnect the power supply before making wiring changes.
-
Keep the board away from moisture, dust and excessive heat.
-
Confirm the amplifier IC, rated output and supported APP features for your specific board version before installation.