XH-A901 Pre-Amp Audio Tone Controller Module with (Volume + Treble + Mid + Bass Control)

Upgrade your audio system with the XH-A901 Pre-amplifier Audio Tone Controller Board, designed for clear sound shaping and precise control. This compact yet powerful module comes with 4 independent B50K rotary knobs, allowing you to fine-tune your audio exactly the way you like.

🎛️ Four Knobs & Their Functions (As Printed on the Board)

From left to right, the POT functions are clearly marked on the PCB:

• 🔊 Volume (音量) – Overall sound level control
• 🎶 Treble (高音) – Adjusts high-frequency clarity and sharpness
• 🎼 Mid (中音) – Controls vocal presence and mid-range balance
• 🔉 Bass (低音) – Enhances low-frequency depth and punch

➡️ All knobs use B50K potentiometers for smooth and reliable adjustment.

⭐ Key Features

• ✅ High-quality pre-amplifier tone control module
• 🎛️ 4-knob independent control: Volume, Treble, Mid, Bass
• 🔧 B50K rotary potentiometers for precise tuning
• 🔊 Low noise & stable performance
• ⚡ Simple VCC & GND power input
• 🔌 Dedicated audio input & output connectors
• 📐 Compact PCB design – easy to fit in enclosures
• 🛠️ Ideal for DIY & repair projects

📋 Technical Specifications