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RDL RU-MLD4 1x4 Microphone/Line Distribution Amplifier

SKU: RDRUMLD4 MFR: RU-MLD4
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Key Features

  • Distribute audio signals flawlessly with the RDL RU-MLD4 distribution amplifier.
  • Achieve pristine sound quality with low noise and distortion for professional audio.
  • Easily connect mics or line-level sources using switch-selectable inputs on this amp.
  • Optimize audio levels with front panel gain trim, perfect for live sound setups.
  • Enjoy versatile connectivity with both XLR and detachable terminal block options.
  • Rely on durable performance with a robust design, backed by RDL's 3-year warranty.
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Special Order?Estimated to Ship: 08/19/2025
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RDL RU-MLD4 Specifications

  • Inputs

    XLR(front); detachable term block(rear)

  • Input level

    Switch-selectable (rear panel) MIC/LINE (for +4 dBu output)
    Mic: -48 dBu to -3 dBu (LO GAIN); -65 dBu to -20 dBu (HI GAIN)
    Line: -15 dBu to +28 dBu

  • Input Impedance

    Mic: 2 kOhms balanced, switchable 24 V phantom (IEC 61938: 2013)
    Line: > 10 kOhms balanced; may be connected unbalanced

  • Outputs (4)

    XLR(front); detachable term block(rear)

  • Output level

    Switch-selectable (rear panel) MIC/LINE

  • Output Impedance

    150 Ohms balanced

  • Gain Trim

    Front panel adjustable
    Mic: Off to 52 dB gain (LO GAIN); Off to 69 dB gain (HI GAIN)
    Line: Off to 20 dB gain

  • Frequency Response

    Mic: 80 Hz to 50 kHz (+/- 0.75 dB); < 10 dB at 20 Hz (integral high-pass filter)
    Line: 15 Hz to 50 kHz (+/- 0.1 dB)

  • THD+N

    < 0.1% (Mic); < 0.005% (Line)

  • CMRR

    > 60 dB (Mic); > 50 dB (Line)

  • Residual Noise

    Below +4 dBu LINE output or -45 dBu MIC output:
    Mic: -79 dB (50dB Gain); -70 dB (Mic 60dB Gain)
    Line: -85 dB

  • Headroom

    > 20 dB (above +4 dBu LINE output)

  • Ambient Operating Environment

    0 to 55 deg. C (32 to 131 deg. F)

  • Power Requirement

    GROUND-REFERENCED, 24 Vdc at 90 mA

  • UPC Code

    813721013163

About RDL RU-MLD4

Overcome your audio distribution challenges with the RU-MLD4 1x4 Microphone/Line Distribution Amplifier, a high-quality, durable, and efficient solution for your audio needs. This versatile device is a four-channel audio distribution amplifier, designed to distribute a balanced microphone or line-level signal to multiple outputs, making it an ideal choice for professional audio setups.

The RU-MLD4 boasts both front-panel XLR jacks and rear-panel detachable terminal blocks for input and all four outputs, offering you flexibility and convenience in your connections. The front-panel XLR connectors and the rear-panel terminals are active at all times, ensuring constant, reliable performance.

This reliable amplifier is equipped with a rear-panel switch to select between MIC and LINE level, allowing you to tailor the device to your specific needs. It also features two additional switches for setting the MIC input for LO or HI gain and for enabling or disabling the standard 24 Vdc phantom power, accommodating a wide variety of dynamic and condenser microphones.

Each of the four outputs provides either a microphone or line level signal and comes with a separate rear-panel switch to set the associated level to either MIC or LINE. The audio outputs are isolated from each other and can be wired balanced or unbalanced, offering you maximum versatility.

The RU-MLD4 also includes a front-panel gain trim control and an RDL Dual-led VU meter, calibrated to indicate +4 dBu for outputs set to line level, providing you with precise control over your audio output. The rear panel houses a detachable terminal block and a power input jack for connecting 24 Vdc power.

Each output of the RU-MLD4 is equipped with a studio-quality audio output transformer, ensuring high-quality, clear sound distribution. With its robust features and superior performance, the RU-MLD4 1x4 Microphone/Line Distribution Amplifier is a reliable choice for your audio distribution needs.

RDL RU-MLD4 Features

  • Distribution Amplifier with Four Outputs
  • Front Panel XLR Input / Output Jacks
  • Detachable Input / Output Terminal Blocks
  • Switch-selectable Mic or Line Input
  • Switch-selectable Mic Gain and Phantom
  • Gain Trim on Input
  • Each Output Switch-selectable Mic or Line

Key Features

  • Distribute audio signals flawlessly with the RDL RU-MLD4 distribution amplifier.
  • Achieve pristine sound quality with low noise and distortion for professional audio.
  • Easily connect mics or line-level sources using switch-selectable inputs on this amp.
  • Optimize audio levels with front panel gain trim, perfect for live sound setups.
  • Enjoy versatile connectivity with both XLR and detachable terminal block options.
  • Rely on durable performance with a robust design, backed by RDL's 3-year warranty.

What's in the box:

  • RDL RU-MLD4 1x4 Microphone/Line Distribution Amplifier
  • Detachable Input/Output Terminal Blocks
  • RDL 3 Year Limited Warranty