RDL RU-MX4L Pro 4 Input Line Mixer - Mic and Line Out


Please Note: requires PS-24AS Power Supply (sold separately)

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  • The L is the ideal choice in many applications where a combination of balanced and/or unbalanced line-level signals needs to be mixed. Balanced connections use XLR connectors. Unbalanced signals are coupled through phono jacks. Each of the four L inputs can accept either a balanced XLR line-level input or an unbalanced line-level phono jack input. The unbalanced phono jack LINE OUTPUT from one L may connect to the unbalanced input of other equipment, or may be connected to the DIRECT input of another L or an to expand mixing capabilities. Up to 3 type mixers may be rack mounted in a single rack unit using an RDL RU-RA3HD rack adapter. The L provides one balanced output, switchable for mic or line level. Audio levels are adjustable on the front panel. Each input channel is equipped with a front-panel dual-LED VU meter that follows standard VU ballistics. The final mix is displayed on an LED string VU meter featuring a visually comfortable arc motion. A factory installed output isolation transformer is available by ordering the LT.

    • Four Channel Line-Level Audio Mixer
    • XLR Balanced, Phono Jack Unbalanced Inputs
    • Mic or Line XLR Output, Switchable
    • Unbalanced Line Output and Direct Input
    • Studio Quality, Low-Noise Performance
    • Expansion Bussing Capability
    • Additional Line Inputs Bussed to an
    • Output Isolation Transformer (LT)
  • Balanced Line Inputs(4): 20 k balanced bridging
    Balanced Line Input Level:
    -13 to +22 dBu for +4 dBu output
    Unbalanced Line Inputs (4):
    2 k unbalanced
    Unbalanced Line Input Level:
    -25 dBV to +20 dBV for +4 dBu output -10 dBV nominal
    Gain Adjustments (4):Balanced Line: Off to 17 dB gain
    Unbalanced Line: Off to 27 dB gain
    Output Attenuator:0 dB to infinity
    Frequency Response:20 Hz to 30 kHz (+/- 0.25 dB)
    THD+N:< 0.01%
    Residual Noise (below +4dBu output):
    4 line level sources (unity gain): < -82 dB (wideband)
    Outputs (2):+4 dBu 150 ohm balanced (switchable to MIC level -45 dBu) -10 dBV unbalanced
    Indicators (17):Dual-LED VU meter for each input POWER LED
    LED audio mix level meter, 0 dB = +4 dBu
    VU ballistic: -20 dB, -10 dB, -6 dB, -2 dB, 0 dB, +3 dB
    Peak reading: +8 dB,+12 dB
    Power Requirement: GROUND-REFERENCED, 24 Vdc @ 150 mA,
    Ambient Operating Environment:0 degrees C to 50 degrees C
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