Product Description: 4 Way Stereo Mixer Board with Adjustable Volume, DIY Sound Source, and Headphone Amplifier 4 In 1 Out Functionality: This stereo mixer board allows you to mix four sound inputs into a single stereo output. It can directly drive headphones or power amplifiers with a maximum drive current of 70mA, making it capable of handling a variety of headphones and external amplifiers effortlessly. Simple Control: Each channel on the mixer board features independent volume control, allowing for precise sound management. With separate input plugs and a single output for the amplifier, the 3.5mm headphone jack and potentiometers ensure that each channel's volume can be adjusted separately without interference. User-Friendly Design: The modern and sleek design of the 4 way stereo sound mixer board enhances any desktop setup. The large, easy-to-use controls prevent tangling with wires or clothing, providing a seamless user experience. Versatile Sound Mixing: This sound mixer is designed to collect audio from multiple sources, such as microphones, guitars, basses, and keyboards, into one convenient listening location for monitoring or routing. It operates with a power supply of DC 5V‑12V and offers an amplification of approximately 2x, ensuring robust performance across various applications. Wide Range of Applications: Ideal for multi-keyboard rigs and recording sessions where multiple channels need to be mixed into a single track, this mixer is perfect for keyboards, small stage setups, drum kits, or pre-mixing before feeding into the main mixer. Its versatility makes it an essential tool for both amateur and professional audio setups. Enhance your audio mixing capabilities with this comprehensive 4 way stereo mixer board, designed to deliver exceptional sound quality and user-friendly features for all your audio needs.