Rolls MX422
Field Mixer, Battery Operated


The MX422 is a four channel, microphone/line mixer with balanced XLR inputs and outputs. The unit is ideal for the broadcast and video markets. It has the same features of other ENG/portable mixers without the extremely high price.


  • DV Field Production
  • Electronic News Gathering
  • Location Recording (Dialogue and Music)
  • Digital Recording
  • Broadcast Remotes
  • Desktop Mixing for Video Post Production


  • Four servo-balanced XLR Inputs
  • Two transformer-balanced XLR outputs
  • Switchable Output Level (Line level, or -30 dB pad)
  • 1/4" TRS Stereo Monitor Input and Auxiliary Input
  • Switchable 48 Volt Phantom Power for each input
  • Switchable 100 Hz Low Cut filters for each input
  • Main and Back-up battery compartments, never lose power
  • Level and Pan controls for each channel
  • Built in Limiter with variable Threshold control
  • 20Hz Slate tone with Slate Microphone included
  • Switchable 1kHz setup Tone
  • Calibrated VU meters
  • 1/4" and 3.5mm Headphone/Earphone Outputs with selectable Source Input (Main Mix or Monitor Input), and Level control
  • Canvas Case Included
  • Rolls PS27 external power supply included


  • Mic Input Impedance: 10k ohms XLR balanced
  • Source Input Impedance: 22k ohms RCA
  • Limiter Threshold: -5dB to off; Fully Clockwise: No Limiting
  • Setup Frequency: 1kHz
  • Slate Frequency: 20Hz
  • Output Attenuator: -30 dB
  • Self Noise: -57 dB maximum; -90 dB typical
  • Max Gain: +65 dB
  • S/N Ratio: 115 dB
  • Frequency Response: 20Hz-30kHz, +0, -3dB
  • Low Cut: 100Hz
  • Trim Range: 0 to +38 dB
  • Max Input: 0 dBV
  • Current Draw: 45 mA with no Phantom Power or Signal
  • Phantom Power: +48 VDC
  • Connectors: 4 x Female XLR, 2 x Male XLR, 3 x 1/4", 1 x 1/8" (3.5mm), 1 Center Negative power jack
  • Power: 12VDC/200mA
  • Size (W x D x H): 9.5" x 7.25" x 2.375"
  • Weight: 4 lbs
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