RDL RU-MX4 4-Channel Mic/Line Mixer

RDL RU-MX4 4-Channel Mic/Line Mixer

RDL RU-MX4 4-Channel Mic/Line Mixer

B&H # RDRUMX4 MFR # RU-MX4
RDL RU-MX4 4-Channel Mic/Line Mixer Back View

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Expected availability: 3-7 business days

Product Highlights

  • 4 x Balanced XLR Mic Inputs
  • 5 x Unbalanced RCA Line Inputs
  • 24V Phantom Power
  • Switchable Compressor
  • 1 x Balanced Mic/Line XLR Output
  • 1 x Unbalanced RCA Output
  • Direct RCA I/O with Another RU-MX4
  • Input Channel Metering
  • Output Metering
  • Power Supply Available Separately
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Configuration: Mixer Only

Mixer Only with Isolation Transformer

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RDL RU-MX4 overview

  • 1Description

The RDL RU-MX4 is a four-channel audio mixer with XLR mic inputs and RCA line inputs. It provides 24V phantom power on a per-channel basis for microphones that require it. Also on hand is a switchable compressor/limiter to keep levels from peaking, if need be. This mixer is useful for combining balanced mic and/or unbalanced line inputs into a single output. The RU-MX4 is suitable for small sound reinforcement, public address systems, or mixer expansion applications.

You'll note that for outputs, you have the options of an unbalanced RCA and a balanced XLR out. The XLR output itself is switchable between mic or line level. While you can only use one input configuration at a time (either XLR or RCA), you can use both outputs simultaneously.

Levels can be adjusted on the front panel, which leaves you enough space to label each input. Each input sports a dual-LED VU meter following standard VU ballistics, with green indicating signal and red to indicate when you go over the correct operating level. The output is displayed on an LED string VU meter. Please note, you must purchase the corresponding PS-24AS power supply separately.

Four Mic/Line Input Channels
Each channel features a balanced XLR mic input and an unbalanced RCA line input. An additional RCA direct input accepts input from another RU-MX4.
Flexible Output Section
The outputs consist of a mic/line selectable XLR channel along with an unbalanced RCA output that may be used for linking multiple mixers.
Phantom Power
A 24V phantom power switch is located below each microphone input. These switches activate the phantom voltage and set the input preamp for the optimum gain range for the type of microphone. An integral high-pass filter rolls off frequencies below 80 Hz.
UPC: 813721013064
In the Box
RDL RU-MX4 4-Channel Mic/Line Mixer
  • Power Interconnect Cable for Additional Units
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description

    RDL RU-MX4 specs

    I/O 4 x XLR inputs, balanced
    5 x RCA inputs, unbalanced
    1 x RCA output, unbalanced
    1 x XLR output, balanced
    Input Level Balanced: -58 to -20 dBu (PHANTOM OFF or ON, HI gain); -41 to −4 dBu (PHANTOM ON, LO gain)

    Unbalanced: -25 to +20 dBV (+4 dBu output, 10 dBV nominal)
    Input Impedance Balanced: 2 kOhms
    Unbalanced: 2 kOhms
    Output Level +4 dBu balanced (switchable to MIC level -45 dBu), -10 dBV unbalanced
    Output Impedance Balanced: 150 Ohms
    Gain Adjustment Mic: Off to 62 dB gain (PHANTOM OFF/ON, HI gain)
    Mic: Off to 46 dB gain (PHANTOM ON, LO gain)
    Line: Off to 27 dB gain
    Frequency Response Mic: 80 Hz to 30 kHz ( 1.5 dB; -10 dB at 20 Hz with integral high-pass filter)
    Line: 20 Hz to 30 kHz ( 0.25 dB)
    THD+N Mic: < 0.1% (80 Hz to 20 kHz)
    Line: < 0.02%
    Residual Noise Unity Gain: < -84 dB (4 Line level sources)
    Mic: -79 dB; < -73 dB (All 4 mic level sources, 40 dB Gain, Phantom on)
    Mic: -79 dB; < -73 dB (All 4 mic level sources, 50 dB Gain)
    Mic: -70 dB; < -64 dB (All 4 mic level sources, 60 dB Gain)
    Indicators Dual-LED VU meter for each input
    Power LED
    Compression/limiting active LED
    Audio mix level meter LED (8 segments, 0 dB = +4 dBu)
    Meter Ballistics VU: -20 dB, -10 dB, -6 dB, -2 dB, 0 dB, +3 dB
    Peak: +8 dB, +12 dB
    Phantom Power 24 V, per channel
    Power Requirement 24 VDC at 150 mA (ground-referenced); power supply available separately
    Signal-to-Noise Ratio Mic: < 0.1% (80 Hz to 20 kHz)
    Line: < 0.02%
    Phantom Power +24 V
    Ambient Operating Environment 32 to 122°F / 0 to 50°C
    Dimensions (H x L) 1.7 x 5.8" / 4.3 x 15.0 cm
    Weight 1.6 lb / 0.7 kg
    Packaging Info
    Package Weight 1.7 lb
    Box Dimensions (LxWxH) 6.75 x 6.3 x 2.5"

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