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The Mackie U.Series mixers combine an array of input options with 24-bit/96kHz FireWire connectivity to meet the eclectic application needs of the modern musician/producer. Flexible inputs and outputs allow for diverse gear integration. The U.420 leaves no line level device behind, with four stereo line level inputs, an RIAA phono preamp, 3-band “full-kill” active EQ, aux sends, a built-in DI and more. The U.420d offers an expanded combination of inputs including two premium Mackie mic preamps with mid-sweepable, 3-band active EQ, plus 30mm channel faders, a built-in DI box and more. Two stereo channels feature RIAA phono preamps for turntables. Add in 3-band “full-kill” active EQ and a 30mm crossfader and it’s a full on DJ/producer control station. U.Series mixers are truly innovative. Concepts like the micro-master section with a centrally located master volume knob provide an intuitive, unique ergonomic experience that will streamline your workflow, maximizing creativity. Simple, versatile, unique … U.Series.


  • 4-channel mic/line mixer with 24bit/96kHz FireWire I/O
  • Simple, modern design makes mixing simple on stage or in the studio
  • 2 premium Mackie mic channels with 3-band, mid-sweep Active EQ
  • True 48V phantom power for condenser microphones
  • 2 high-headroom stereo line inputs with RIAA phono preamps, 3-band “full-kill” acitve EQ and a 30mm crossfader
  • Built-in DI box for instruments like acoustic guitar and bass
  • Mackie designed RIAA phono preamp for turntables
  • Stereo aux send for booth monitoring and effects