CA-AS21 TPA3255 2.1 Channel Digital Power Amplifier | 220W×2 + 350W Subwoofer in English

Are you ready to build a powerful and high-fidelity home audio system?
The CA-AS21 Digital Power Amplifier Board is a premium choice for DIY speaker projects, delivering massive output power, excellent sound quality, and versatile connectivity—all in a compact design.

🔥 Key Features & Performance

Amplifier Chipset:
Powered by the high-performance TPA3255 Class-D amplifier chip, offering high efficiency, low distortion, and crystal-clear audio output.

Channel Configuration:
2.1 Channel System (Stereo Left + Right + Subwoofer)

Output Power (Maximum):

Stereo (L & R): 220W × 2

Subwoofer: 350W

Power Supply Requirement:

Operating Voltage: DC 16V – 38V

Recommended Current: 5A – 10A high-current power supply for maximum performance

⚙️ Full Sound Customization

Fine-tune your audio exactly the way you want using the onboard control knobs:

Main Volume Control: Master volume for the entire system

Subwoofer Volume: Independent bass level adjustment

Subwoofer Frequency (Crossover): Adjustable low-pass filter (typically 20Hz – 200Hz)

Bass & Treble Controls (L & R Channels): Separate tone control for main speakers

🔌 Versatile Input Options

Designed for modern audio sources with multiple input methods:

Bluetooth 5.1:
Stable, fast, and high-quality wireless audio streaming from smartphones, tablets, and PCs

AUX Input (3.5mm Jack):
Reliable wired connection for external devices

USB Drive Support:
Play music files directly from a USB flash drive

USB Sound Card Function:
Connect to a PC or laptop via USB and use the board as an external sound card

🛡️ Built-in Protection Circuits

Ensures safe and reliable operation even at high power levels:

Reverse Polarity Protection

Over-Voltage & Under-Voltage Protection

Over-Temperature Protection

Short-Circuit Protection

✅ Ideal Applications

Perfect for:

DIY Bluetooth speaker projects

Upgrading passive bookshelf speakers

Building powerful 2.1 home audio systems

Home theater subwoofer and speaker setups

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