The CA-AS21 Digital Bluetooth Audio Amplifier Board is a high-power, audiophile-grade 2.1 channel system designed for DIY enthusiasts who want to build their own professional-level home theater or car audio setup. At Electrapac, we recommend this module for its use of the high-end TPA3255 chip, which delivers massive power with ultra-low distortion.

Product Overview

This module is a true powerhouse, providing a massive 790W total output. It is designed as a 2.1 system, meaning it powers two stereo speakers (Left and Right) plus a dedicated high-power Subwoofer channel for deep, punchy bass.

Key Features for Electrapac Customers

• Pure Audiophile Power: The TPA3255 chip allows for Class D efficiency with true high-end sound quality. It maintains low noise even at high volumes.

  Advanced Control Knobs: The front panel features five precision potentiometers to fine-tune your sound:
• • Subwoofer Frequency: Adjust the crossover point for your bass.

  • Subwoofer Volume: Independent control for the low-end.

  • Left/Right Channel Treble & Bass: Custom EQ for your main speakers.

  • Master Volume: Main volume control with an integrated power switch.

• Smart App Integration: Compatible with the Sinilink App, allowing you to rename the Bluetooth ID, set passwords, and adjust the equalizer directly from your smartphone.

• Superior Cooling: Features a large, thickened integrated heat sink and a silent cooling fan to ensure the board stays stable during long-duration, high-power playback.

• Safety Protections: Built-in protection against undervoltage, overvoltage, clipping, short circuits, and overheating.

Setup & Connection Tips

1. Power Supply: To achieve the full 790W output, you need a high-quality DC power supply (36V/10A or higher). Using a 12V supply will significantly limit the output power.

2. Speaker Pairing:

   • L/R Channels: Best paired with 30W–220W, 3Ω–8Ω speakers.

   • Subwoofer: Best paired with 30W–350W, 2Ω–8Ω subwoofers.

3. Antenna: The board comes with an external Bluetooth antenna socket to extend the wireless range if you are mounting the board inside a metal enclosure.

Why Shop at Electrapac?

We source the CA-AS21 with genuine TPA3255 chips to ensure you get the performance you pay for. Find this amplifier and the perfect power supply to match at www.electrapac.com.