1、[Signal Amplification] Sound splitter mixer can be used for input signal amplification or output signal amplification, a 4 way output preamp, headphone amp, can directly drive 300Ω headphones. 2、[Independent Switch] Sound splitter mixer amplifier with 8 way signal, each independent switch, independent volume adjustment, all two pole independent circuit, no interference, no sound changing. 3、[4 In 4 Out] This amplifier mixer with 4 inputs and 4 outputs, each independent switch independent volume adjustment, you can freely set the input, output channel and volume level. 4、[No Interference] The mixer positive and negative polarity of their own independent relays, a total of 16 sound relays. Even if there is a common ground with input devices with interference, it does not affect the other channels. 5、[Easy To Use] Professional mixing console amplifier, volume push block to the middle position, restore the signal, no gain upward sliding, can amplify the signal as a preamplifier. Item Type: Sound Splitter Mixer Material: Aluminum Alloy Input Impedance: 47kΩ Output Impedance: 600Ω Frequency Response Range: 20hz-20KHz Output Power: 850mw, 32Ω 300mw, 150Ω Amplification Factor: 4.1 SNR: 96.86 Harmonic Distortion: 0.0048 1 x Sound Splitter Mixer 1 x Power Cord 1 x Adapter 1 x Instruction Manual