• 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

📡 Bluetooth 4.2 Connectivity – Fast, stable, and widely compatible
🔊 5W+5W Stereo Output – Clear and powerful dual-channel sound
🎧 Auto Pairing Function – Connects automatically to saved devices
📶 15m Wireless Range – Strong signal in open space
💎 Good Sound Quality – Enhanced audio performance (8002 level)
🔌 USB Sound Card Support – Plug & play, no drivers needed
🔋 Charging Port Built-In – Supports lithium battery charging
⚡ Efficient Power Use – Works best with 5V 2A supply
🛠️ DIY Friendly Design – Perfect for custom speaker builds
📦 Compact Module – Easy to install in small enclosures

🎚️ 3-Band Tone Control – Adjustable Bass, Mid, Treble for perfect audio
⚡ Low Power Operation – Runs efficiently at 3V DC
💎 Premium Japanese Build – Reliable and durable components
📏 Compact Design (36x31mm) – Fits easily into small enclosures
🔧 Easy Integration – Works with most preamps and audio boards
🎧 Stereo Output – Optimized for dual-channel audio
🛠️ DIY Friendly – Perfect for hobbyists and audio enthusiasts
🔥 Precise Frequency Adjustment – Fine-tune your sound exactly
📦 Versatile Applications – Amplifiers, speakers, and audio projects
🎨 Professional-Grade Audio Control – Crisp and clean tone adjustments

• 🎸 Heavy Bass Boost: Tailor your low-end frequencies for deep, powerful resonance.

• 🎤 Vivid Treble Control: Enhance high-frequency clarity for crisp vocals and sharp instruments.

• ⚖️ Precision Balance Knob: Perfectly align your stereo image between left and right speakers.

• 🔊 Master Volume Control: Smooth, linear attenuation for total sound level management.

• 🚀 Active Op-Amp Circuit: Uses high-performance operational amplifiers for superior signal gain.

• 🔋 Dual Supply Stability: Engineered for 15V-0-15V DC input to maximize dynamic range.

• 📉 Low Noise Distortion: High-quality filtering capacitors ensure a hum-free audio experience.

• 📏 Compact PCB Footprint: Slim, efficient layout designed for easy mounting in any cabinet.

• 🏗️ DIY Friendly Design: Clearly labeled input, output, and power terminals for quick soldering.

• ✅ Professional Grade: Built with durable components to withstand continuous, high-heat operation.

• 🔊 MASSIVE 140W STEREO OUTPUT – Delivers a powerful 70W + 70W across two channels, providing enough energy to fill large rooms with immersive sound.

• 🎼 CLASS AB FIDELITY – Combines the efficiency of Class B with the low distortion of Class A, ensuring a smooth, natural audio response.

• ⚡ HIGH-EFFICIENCY POWER – Operates at over 80% power efficiency, meaning more energy goes to your music and less is wasted as heat.

• 🏗️ ROBUST THERMAL DESIGN – Equipped with four individual aluminum heat sinks to keep the high-power transistors cool during extended use.

• 📉 WIDE FREQUENCY RANGE – Supports a broad response from 20Hz to 2000Hz, capturing everything from deep sub-bass to clear mid-tones.

• 🔌 DUAL AC POWER INPUT – Optimized for high-performance transformers with a recommended supply voltage of 25V + 25V AC.

• 📻 VERSATILE IMPEDANCE – Perfectly compatible with speakers ranging from 4Ω to 8Ω, giving you the flexibility to use a variety of cabinet types.

• 🛠️ EASY CONNECTIONS GUIDE – Features clearly labeled onboard points for Audio Input, Speaker Output, and AC Power, making DIY installation a breeze.

• Frequency response: 20Hz to 2000Hz
• Speakers size: 8 to 10 inches (10 inches recommended)

🔹 Bluetooth 5.0 Connectivity – Fast and stable wireless audio streaming
🔹 Stereo Dual Channel Output – Clear left and right channel sound
🔹 Wide Voltage Input – Supports DC 8V to 24V
🔹 Volume Control Knob – Easy sound adjustment and play/pause function
🔹 Multiple Speaker Support – Compatible with 4Ω to 16Ω speakers
🔹 Clear Audio Performance – Low distortion sound quality
🔹 Reverse Connection Protection – Prevents wrong wiring damage
🔹 Short Circuit Protection – Improved safety during use
🔹 Thermal Self-Recovery – Automatically protects from overheating
🔹 Compact Shell Design – Durable and easy to install