Features 1. High Quality Amplifier Board：The NE5532 HIFI preamp tone board kit is designed to deliver superior audio performance. Pre-amplifier assembly boards provide a reliable and high-fidelity solution for controlling the volume of audio systems. 2. Efficient and smooth volume control: With its AC 12V OP-AMP HIFI amplifier, Amplifier Board can precisely control the volume of sound output. Whether you want to increase or decrease the volume, this board ensures smooth, accurate adjustments. 3. Enhanced anti-interference performance: Due to its high conversion rate and strong driving capability, the NE5532 HIFI amplifier board has better performance compared with other models. It effectively eliminates noise and interference for a clear, distortion-free audio experience. 4. Easy DIY Installation: This preamp preamp tone board kit is designed for DIY enthusiasts and comes with all necessary components for easy installation. You can assemble it to your liking and enjoy the satisfaction of building your own audio equipment. 5. High-fidelity sound quality: NE5532 HIFI preamp preamp soundboard kit is known for its warm and high-fidelity sound, which adds a unique personality to your music. Experience high-fidelity audio reproduction and immerse yourself in a rich sound experience with this versatile amplifier board. Description: High quality filter power supply. The four pins of rectifier respectively in parallel connect with decoupling capacitor, which can effectively eliminate the high frequency interference of AC power grid.  Now the clutter interference of power grid is very small and the voltage is quite stable. So the item has better performance.The chip has high conversion rate and strong drive ability. The frequency band is wide and noise is very small. Features: 1, Power supply circuit adopts full bridge rectifier. 2, Effectively eliminate the high frequency interference of AC power grid. 3, Chip has high conversion rate and strong drive ability. 4, Better performance,noise is very small. 5,Sound warm and distorted, high fidelity Specifications: Working Voltage: AC double 12-18V tune type: Low/Middle/High Pitch/Volume Channel: Double channel Audio Input: RCA sockets Audio Output: 3P terminal Input Voltage: 3P terminal Size: 105 mm x 54 mm Weight: 75g Package includes: 1 x HIFI Preamplifier Control Board Module Note: 1, Please allow 1-3 mm error due to manual measurement. Thanks for your understanding. 2, Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List