4 Channel Audio Mixer - Microphone or line input and output

  • Four Channel Audio Mixer
  • Balanced Microphone and Line Inputs
  • Balanced Microphone and Line Outputs
  • Switch-Selectable 24 V Mic Phantom
  • Three Switch-Selectable Mic Gain Ranges
  • Studio-Quality, Low-Noise Performance
  • Convenience of RDL® FLAT-PAKs™
  • Recommended Power Supply ( Not Included )
    PS-24AS (USA)PS-24AX (International)


    The FP-MX4 is a single-channel audio mixing module featuring four identical inputs. Each input accepts either a mic or line level source. The output section provides four mixing potentiometers corresponding to the four inputs. The output section provides both a balanced line (+4 dBu) and balanced microphone level (-45 dBu) output. Both outputs may be used at the same time. The four mixing potentiometers are intended to be set at installation or to be adjusted occasionally. Levels may be adjusted at the mixer using the RDL dual-LED VU meter which displays the mixer output level.


    Indicators (2)Dual-LED VU meter (line-level output)
    Outputs (2):Line: +4 dBu 150 Ω balanced; mic: -45 dBu 150 Ω balanced
    THD+N:Mic: < 0.012%
    Line: < 0.004%
    Frequency Response:Mic: 10 Hz to 30 kHz (± 0.25 dB)
    Line: 10 Hz to 45 kHz (± 0.25 dB)
    Gain Adjustments (4):Mic: Off to 65 dB gain (max. gain range); line: Off to 6 dB gain
    Line Input Level:+4 dBu
    Line Inputs (4):10 kΩ balanced (may be wired unbalanced)
    Microphone Input Level:Switch selectable ranges: -30 to -40 dBu, -40 to -50 dBu, < -50 dBu
    Ambient Operating Environment:0° C to 50° C
    Residual Noise (below +4dBu output):Note (A) = A-Weighted
    4 line level sources (unity gain): < -84 dB (wideband)
    40dB Gain: Mic: -90 dB; all 4 mic level sources: < -82 dB (wideband); < -84 dB ("A" weighted)
    50dB Gain: Mic: -86 dB; all 4 mic level sources: < -72 dB (wideband); < -76 dB ("A" weighted)
    60dB Gain: Mic: -80 dB; all 4 mic level sources: < -65 dB (wideband); < -67 dB ("A" weighted)
    Power Requirement:24 Vdc @ 160 mA, Ground-referenced
    Microphone Inputs(4):2 kΩ balanced, switchable 24 V phantom (IEC 61938: 2013)
    Overall Dimensions:Height: 1.42 in. 3.61 cm, Width: 3.25 in. 8.26 cm, Length: 8.14 in. 20.68 cm
    Package Type:Cardboard Box
    WEEE weight:0.99 lbs.
    Shipping Weight:1.235 lbs.
    Tariff code:8543.70.9860
    Package Dimensions:3.375 x 8.5625 x 1.5 in.

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    CAD FilesUnitsFormat
    Engineering Functional BlockAmericanDXF
    Panel Diagram - FrontAmericanDXF
    Panel Diagram - FrontMetricDXF
    High Res ImagesFormat
    Declaration of Conformity


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