Signal Amplification: This versatile sound splitter mixer is designed for both input and output signal amplification. It functions as a 4-way output preamp and headphone amplifier, capable of directly driving 300Ω headphones. Whether you're enhancing input signals or boosting output, this device ensures clear and powerful audio performance. Independent Switch: Equipped with an 8-way signal system, this mixer amplifier features independent switches and volume adjustments for each channel. The two-pole independent circuit design ensures no interference or sound distortion, allowing you to maintain pristine audio quality across all channels. 4 In 4 Out: With 4 inputs and 4 outputs, this amplifier mixer offers complete flexibility. Each channel has its own independent switch and volume control, enabling you to customize input, output channels, and volume levels to suit your specific audio setup needs. No Interference: The mixer is designed with independent relays for both positive and negative polarities, totaling 16 sound relays. This design ensures that even if there is a common ground with input devices, any interference will not affect other channels, maintaining uninterrupted and high-quality sound. Easy To Use: This professional mixing console amplifier is user-friendly, with a volume push block that can be set to the middle position to restore the signal. Without any gain, sliding upward allows the device to function as a preamplifier, amplifying the signal effortlessly. Ideal for both beginners and experienced audio professionals, this mixer offers reliable performance and ease of use.