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RDL FP-MX4 4 Channel Audio Mixer - Microphone or Line Input and Output
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    RDL FP-MX4 4 Channel Audio Mixer - Microphone or Line Input and Output

    Manufacturer: Radio Design Labs

    Item #: FP-MX4   •   MFG #: FP-MX4




    Required Accessories

    The RDL 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.

    Required Power Supply RDL PS24V Sold Separately

    • Features

      • 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™
    • Specifications

      • Microphone Inputs (4): 2 kΩ balanced, switchable 24 V phantom (IEC 1938: 1996‑12)
      • Microphone Input Level: Switch selectable ranges: ‑30 to ‑40 dBu, ‑40 to ‑50 dBu, < ‑50 dBu
      • Line Inputs (4): +4 dBu, 10 kΩ balanced (or unbalanced)

      • Mic: Off to 65 dB gain (adjustable each input)
      • Line: Off to 6 dB gain (adjustable each input)

        Frequency Response:
      • Mic: 10 Hz to 30 kHz (+/‑ 0.25 dB)
      • Line: 10 Hz to 45 kHz (+/‑ 0.25 dB)

      • Mic: < 0.012%
      • Line: < 0.004%

      • Residual Noise (below +4dBu output): Note, (A) = A‑Weighted

        Unity Gain:
      • 4 Line level sources
      • < ‑84 dB (wideband)

        40dB Gain:
      • Mic: ‑90 dB; All 4 mic level sources:
      • < ‑82 dB (wideband); < ‑84 dB (A)

        50dB Gain:
      • Mic: ‑86 dB; All 4 mic level sources:
      • < ‑72 dB (wideband); < ‑76 dB (A)

        60dB Gain:
      • Mic: ‑80 dB; All 4 mic level sources:
      • < ‑65 dB (wideband); < ‑67 dB (A)

        Outputs (2):
      • Line: +4 dBu 150 Ω balanced
      • Mic: ‑45 dBu 150 Ω balanced

      • Indicators (2): Dual‑LED VU meter (line‑level output)

      • Power Requirement: GROUND‑REFERENCED, 24 Vdc @ 160 mA

        Overall Dimensions:
      • Height: 1.42 in. 3.61 cm
      • Width: 3.25 in. 1.42 in.
      • Length: 8.14 in. 1.42 in.

      • Ambient Operating Environment: 0° C to 50° C

    Add Accessories for your FP-MX4: