Radio Design Labs RU-MX4T
4-Input Line Mixer with Transformer


Our Price: $342.43
List Price: $458.07
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Radio Design Labs' RU-MX4 Pro 4 input mic/line mixer is the ideal choice 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 included.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.


  • 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
Mounting Bracket for RACK-UP SeriesRadio Design Labs RU-BR1 Mounting Bracket for RACK-UP Series

The RU-BR1 mounts an RDL 'RACK-UP' module above or below a horizontal surface.

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Our Price:$33.16List Price: $39.14You save 15%!

24 VDC 500mA Switching Power SupplyRadio Design Labs PS-24AS 24 VDC 500mA Switching Power Supply

Radio Design Labs' PS-24AS is a 24 Vdc switching power supply with a North American AC plug.  500 mA, dc plug.Specifications: Input: 100 to 240 VACOutput: 24 Vdc, 500 mA (UL, CSA)Dimensions: 1.65" x 2.75" x 1.45" (4.2 x 7 x 3.7 ...

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Single RACK-UP Mounting Bay Utility ChassisRadio Design Labs UC-1 Single RACK-UP Mounting Bay Utility Chassis

Radio Design Labs' UC-1 is an ULTRASTYLE design tabletop chassis for mounting RDL modules and accessories. The front panel features a single RACK-UP mounting bay. The rear panel has an identical mounting bay and is supplied with matching ...

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Our Price:$84.01List Price: $112.37You save 25%!

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