3 Channel Audio Mixer - Line input and output

  • Mix Line-Level Signals
  • Three Individually Adjustable Inputs
  • Add Additional Line Level Inputs to an Existing Mixer
  • Combine Signals of Different Level, Impedance or Balanced /Unbalanced Configuration
  • Isolation Between Input Signals
  • Low-Noise and Low-Distortion Performance
  • RDL® SupplyFlex™ Power Input Configuration
  • Recommended Power Supply ( Not Included )
    PS-24AS (USA)PS-24AX (International)


    The ST-MX3 is a line-level mixer module in the STICK-ON Series of products. It provides audio mixing of three line-level inputs with individual input gain adjustments. The line-level output is capable of driving either high or low impedance, balanced or unbalanced loads.

    The ST-MX3 operates from ground-referenced floating or bipolar dc power.

    For installations with microphone level inputs, use the ST-UMX3 Universal Audio Mixer.


    Inputs (3):30 kΩ balanced or unbalanced bridging
    Input Level:-20 dBu to +18 dBu (for +4 dBu output)
    -24 dBu to +14 dBu (for 0 dBu output)
    Output:400 Ω to drive low or high impedance balanced or unbalanced lines
    Output Level:+4 dBu nominal, (adjustable; unbalanced output 6 dB below balanced line level)
    THD+N:< 0.03% (10 Hz to 20 kHz)
    Frequency Response:10 Hz to 20 kHz (± 0.5 dB)
    Noise :< -80 dB (all inputs @ 10 dB gain, referenced to +4 dBu)
    Headroom:18 dB
    Gain (each input):-14 dB to +24 dB (adjustable)
    CMRR:> 50 dB (50 to 120 Hz)
    Ambient Operating Environment:0° C to 55° C
    Power Requirement:GROUND-REFERENCED or FLOATING, 24 Vdc @ 55 mA
    Package Type:Cardboard Box
    WEEE weight:0.12 lbs.
    Shipping Weight:0.17 lbs.
    Tariff code:8543.70.9860
    Package Dimensions:2 x 2 x 4 in.

    Related Products

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    • RU-MX4

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    • RU-MX4L

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    • RU-MX4LT

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    • 4 Channel Mixer


      Professional 4 Channel Microphone/Line Mixer with Phantom Power & Transformer - Microphone and line output

    • Five Channel Mixer


      5 Channel Mic/Line Audio Mixer with Phantom Power

    • Two Channel Audio Mixer


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    • Compact 3x1 Audio Mixer


      3x1 Universal Audio Mixer - 3 microphone or line inputs x 1 microphone or line output

    • TX-MX2R

      Audio Mixer / Distribution Amplifier

    Format-A® Mixers
    • FP-TPX3A

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