Amazon.com: Moukey Mini Audio Mixer Line Mixer, DC 5V, 4-Stereo Ultra, Low-Noise 4-Channel for Sub-Mixing, Ideal for Small Clubs or Bars, As Guitars, Bass, Keyboards Mixer, 2021 New Version-MAMX1 : Musical Instruments
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Alesis MultiMix 4 USB FX 4-Channel Mixer with Effects & USB Audio Interface | Guitar Center
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Amazon.com: LZSIG Mini Audio Mixer,Stereo Line Mixer for Sub-Mixing,Ultra Low-Noise,4-Channel,Microphone Independent Control, 1/4" & 1/8" TRS Output and Input, for Guitars,Bass,Keyboards or Stage Mixer Extension : Musical Instruments
USBMix4 – Four Channel Mixer / USB Audio Interface – ART Pro Audio