Looking for a powerful Bluetooth amplifier board for your next DIY audio project? The HIFI Digital Bluetooth Amplifier-100W×2 offers high-fidelity sound with ultra-low distortion and is designed to work seamlessly with 4Ω–8Ω passive speakers. Whether you're connecting it to a Raspberry Pi, smartphone, or another Bluetooth-enabled controller, this board delivers outstanding performance and flexibility.
With built-in AM interference suppression and filtering technology, the total harmonic distortion (THD) is as low as 0.1%, ensuring clear, stable, and high-quality sound output even at high volumes. The board supports both Bluetooth 5.0 and AUX input, providing dual connectivity options. It also includes a volume control knob, heat sink, top/bottom acrylic protective panels, and multiple protection mechanisms.
Key Features
-
Output Power: 100W × 2 (stereo)
-
Input Modes: AUX + Bluetooth 5.0
-
Audio Quality: Hi-Fi level with THD as low as 0.1%
-
Operating Voltage: DC 5V–27V
-
Compatible Speakers: 4Ω–8Ω, 50W–300W passive speakers
-
Bluetooth Range: Up to 15 meters (without obstacles)
-
Built-in Protection: Overvoltage, undervoltage, overheating, short circuit, and DC detection
-
Capacitor Design: Equipped with five high-quality 470μF capacitors for stable power output
-
Heat Dissipation: Includes a heat sink and efficient power module for thermal management
Performance by Voltage
Power Supply | 8Ω Speakers | 4Ω Speakers |
12V | 24W + 24W | 40W + 40W |
15V | 32W + 32W | >60W + 60W |
19V | 64W + 64W | >92W + 92W |
24V | 76W + 76W | >110W + 110W |
Note: Maximum output power depends on adequate voltage and current. The lower the speaker impedance, the higher the output power (assuming sufficient power supply).
How to Use
-
Connect the amplifier board to passive speakers.
-
Power the board via DC (5–27V).
-
Turn the knob to power on – the LED indicator will light up.
-
Enable Bluetooth on your phone or Raspberry Pi.
-
Search for "BT-WUZHI" and connect.
-
A prompt tone will confirm successful pairing.
-
The device auto-reconnects on future startups.
Package Contents
-
1 × HIFI Digital Bluetooth Amplifier-100W×2
-
2 × Acrylic Protective Panels (Top & Bottom)
-
1 × Screwdriver
-
1 × Heat Sink
-
1 × 20cm Power Wire
-
1 × Volume Knob
-
1 × Accessories Kit