RDL RU-MX4 RACK-UP 4-Channel Mic/Line Mixer with Phantom Power

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The RDL RU-MX4 RACK-UP Mixer features phantom power and many other professional features.

The RU-MX4 RDL Mixer is the ideal choice in many applications where a combination of balanced mic 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 inputs can accept either a balanced XLR mic or an unbalanced line-level input. 24 V phantom is individually switch selectable for each mic input. The unbalanced phono jack LINE OUTPUT from one RU-MX4 may connect to the unbalanced input of other equipment, or may be connected to the DIRECT input of another RU-MX4 to expand mixing capabilities. Up to 3 RU-MX4 mixers may be rack mounted in a single rack unit using an RDL RU-RA3HD rack adapter. The RU-MX4 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 rear-panel switch allows the soft-knee compressor to be switched in or out. A factory installed output isolation transformer is available by ordering the RU-MX4T.

Important!Power supply is required. Not included; order separately.

  • Four Channel Audio Mixer with Expansion Capability
  • XLR Microphone Inputs, Phono Jack Line Inputs
  • Switchable 24 V Phantom for Each Mic Input
  • Mic or Line XLR Output, Switchable
  • Unbalanced Line Output and Direct Input
  • Integral Compressor/Limiter, Switchable
  • Studio-Quality, Low-Noise Performance
  • Microphone Inputs (4): 2 k ohms balanced, switchable 24 V phantom (IEC 1938: 1996-12)
  • Mic Input Level for +4 dBu output: -58 to -20 dBu (PHANTOM OFF or ONHI gain); -41 to -4 dBu (PHANTOM ON LO gain)
  • Line Inputs (4): 2 k ohms unbalanced
  • Line Input Level for +4 dBu out: -25 dBV to +20 dBV, -10 dBV nominal
  • Gain Adjustments (5):
    • Mic: Off to 62 dB gain (PHANTOM OFF ONHI gain);
    • Off to 46 dB gain (PHANTOM ON LO gain);
    • Line: Off to 27 dB gain
  • Output Attenuator: 0 dB to infinity
  • Frequency Response:
    • Mic: 80 Hz to 30 kHz (+/- 1.5 dB),
    • <-10 dB @ 20 Hz (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%
  • Unity Gain: < -84 dB (4 Line level sources)
  • 40dB Gain, Phantom on: Mic: -79 dB; < -73 dB (All 4 mic level sources)
  • 50dB Gain: Mic: -79 dB; < -73 dB (All 4 mic level sources)
  • 60dB Gain: Mic: -70 dB; < -64 dB (All 4 mic level sources)
  • Outputs (2):
    • +4 dBu 150 ohms bal. (switchable to MIC level -45 dBu);
    • -10 dBV unbalanced
  • Balanced Output Coupling: Elec. bal. (RU-MX4) or 600 ohmsTransformer (RU-MX4T)
  • Indicators (18):
    • Dual-LED VU meter for each input;
    • COMP/LIMIT active LED; POWER LED; LED audio mix meter,
    • 0 dB = +4 dBu
    • VU (dB): -20, -10, -6, -2, 0, +3; Peak Reading (dB): +8,+12
  • Power Requirement: GROUND-REFERENCED, 24 Vdc @ 150 mA
  • Ambient Operating Environment: 0° C to 50° C

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