• Model: XH-M139

• Amplifier Chip: TPA3116D2 × 2

• Channels: 3 (Left + Right + Bass)

• Power Supply: DC 12V – 24V

• Speaker Impedance: 4Ω – 8Ω

• Signal-to-Noise Ratio: 100dB

• Frequency Response: 14Hz – 100kHz

• Switching Frequency: 1.2MHz

• Material: Electronic Components

• Board Size: 100 × 80 × 28 mm

• Weight: 118g

• 🟢 2.1 Channel Amplifier – Dedicated left, right, and subwoofer channels for complete sound systems.
  🔵 TDA2050 Audio Chip – High-quality amplifier IC used for clear and detailed stereo sound.
  🟡 Powerful Bass Section – D1047 transistor drives the subwoofer for deep and punchy bass.
  🟣 NJM4558 Low Pass Filter – Enhances low frequency response and improves bass performance.
  🟠 Dual Transformer Support – Works with 15-0-15V AC or 24-0-24V AC transformer supply.
  🔷 High Efficiency Design – Provides over 90% power efficiency with stable performance.
  ⚙ Perfect for DIY Audio Projects – Ideal for home theater, subwoofer systems, and amplifier builds.

🔊 70W Powerful Bass Output – Deep and punchy low frequencies
🎚️ Low Pass Filter (20Hz–200Hz) – Dedicated bass performance
💎 Class AB Design – Balanced efficiency and sound quality
⚡ High Efficiency (>90%) – Better power utilization
🛠️ Quality Components – LM324 + D1047/B688 transistor design
📢 4Ω–8Ω Speaker Support – Flexible compatibility
🔥 Strong & Clean Bass – No distortion, smooth output
🔧 DIY Friendly Board – Ideal for custom audio builds
📏 Compact Size – Easy to fit in enclosures
💼 Professional Performance – Great for home and car audio systems

🔹 Bluetooth 5.0 Technology – Stable and fast wireless audio connection
🔹 40W + 40W Output Power – Strong stereo sound performance
🔹 Wide Voltage Input – Supports DC 5V to 24V
🔹 Dual Speaker Support – Works with 4Ω and 8Ω speakers
🔹 Clear Audio Quality – Low distortion sound output
🔹 Deep Bass Response – Enhanced music experience
🔹 Reverse Protection – Prevents wrong polarity damage
🔹 Short Circuit Protection – Safer long-term use
🔹 Thermal Protection – Prevents overheating issues
🔹 Compact Design – Perfect for DIY installations

• Color: Blue
• Material: metal
• The on-board TDA7297 audio power amplifier chip. double channel 15W+15W.
• speaker for European 4-8 10-50W use
• Main pin has led chip. convenient external control device. the onboard
• 5.08 (mm) distance between two p terminal 2 road. around a track connection
• output respectively
• The on-board dial potentiometer. output size can adjust the volume
• Support DC. terminal blocks. row needles 3 power input mode. the default
• Power input mode is DC 5.5 * 2.5 seat
• Working voltage: 6-18V
• Board size: 45 (mm) x33 (mm)

🎵 Dual-channel 15W+15W stereo output
💡 LED indicators for easy monitoring and control
🔧 Onboard potentiometer for adjustable volume
⚡ Works with 9V–15V DC power supply
🛠️ Supports 4–8Ω speakers, 10–50W
📏 Compact 55×55mm size, easy to install
🔌 Flexible input: DC, terminal, or 3-pin mode
🎚️ Clear and stable audio amplification
✅ High-quality TDA7297 chip for reliable performance
🌍 Ideal for DIY audio systems, mini speakers, and portable electronics