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.