ZK‑502MT Bluetooth 5.0 High‑Power Stereo Amplifier Board – 2 × 50 W (2.0 Channel) with Dedicated Subwoofer/Bass Boost S0204

Specification:

1. Bluetooth Version: 5.0, 15 m (open field)
2. Audio Channels: 2.0 Stereo (Left + Right)
3. Output Power: 2 × 50 W @ 24 V / 4 Ω
4. Supply Voltage: DC 9 V – 24 V (≥5 A recommended)
5. Audio Inputs: Bluetooth, 3.5 mm AUX (line‑in)
6. Impedance Range: 4 Ω – 8 Ω speakers
7. Signal‑to‑Noise Ratio: ≥ 90 dB
8. Bass Enhancement: Independent low‑frequency boost circuit
9. Protection: Over‑voltage, over‑temperature, short‑circuit
10. PCB Size: 70 mm × 50 mm × 18 mm

Description :

The ZK‑502MT is a compact, high‑efficiency Class‑D amplifier board that delivers a robust 50 watts per channel while streaming loss‑free audio over Bluetooth 5.0. A dedicated bass‑enhancement stage adds punch to subwoofers, making this module perfect for bookshelf speakers or DIY boom boxes. Simply connect a 9‑24 V DC supply, pair your phone, or feed music through the AUX jack, and enjoy clean, low‑distortion sound. Built‑in protections guard against shorts, overheating, and over‑voltage, ensuring reliable operation whether in a home studio, vehicle, or portable project box.

Application:

1. DIY Bluetooth bookshelf or desktop speaker builds
2. Upgrading passive car door speakers to a powered system
3. Portable boom boxes and battery‑powered party speakers
4. Home theater PC or arcade cabinet audio amplification
5. Classroom or workshop demonstrations of Class‑D audio tech