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Radio Design Labs RU-MX4
4-Input Microphone/Line Mixer

OUR PART #  RUMX4

Our Price: $331.86
List Price: $443.91
You save 25%! (Low Price Guarantee)
Usually ships in 7-14 business days.
Need it sooner? Call us!

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Radio Design Labs' RU-MX4 is part of the group of RDL RACK-UP products. The compact design permits high-density installations, with threeproducts mounted in a single rack unit. The RU-MX4 may be used alone, or mounted using a wide variety of RACK-UP series options.

The RU-MX4 is the ideal choice in many applications where a combination of balanced mic and/or unbalanced line-level signals needs to be mixed. All balanced connections are made through XLR connectors. Unbalanced signals are coupled through phono jacks.

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.

Each of the four RU-MX4 inputs can accept either a balanced XLR mic or an unbalanced line-level phono input. Each MIC input accepts either a dynamic or a condenser microphone. A PHANTOM switch is located below each microphone input. These switches activate the phantom voltage and set the input preamplifier for the optimum gain range for the type of microphone. An integral high-pass filter rolls off frequencies below 80 Hz.

A separate unbalanced DIRECT input allows an external audio source to be summed directly into the mix amplifier, bypassing the front-panel input level controls. 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 RUMX4 mixers may be rack mounted in a single rack unit using an RDL RU-RA3HD rack adapter. A power interconnect cable is supplied with each RU-MX4 allowing the rack mounted mixers to run from a single 24 Vdc power supply.

The RU-MX4 provides one balanced output, switchable for mic or line level. The balanced XLR output and the unbalanced phono jack output may be used at the same time.

Audio levels are adjustable on the front panel. A convenient label area is provided below each fader knob. A label tab included with the mixer may be professionally labeled using a commercial lettering machine, or the user may write on the front of the mixer.

Each input channel is equipped with a front-panel dual-LED VU meter that follows standard VU ballistics. A green LED illuminates at 15 dB below the optimum input gain, becoming progressively brighter with increasing audio level. The adjacent red LED illuminates when the input gain exceeds the correct operating level.

The final mix is displayed on an LED string VU meter featuring a visually comfortable arc motion. The outputs may be fed directly from the final mix, or may be routed through the integral compressor/limiter. A rear-panel switch allows the soft-knee compressor to be switched in or out. When active, the compressor/limiter begins acting as signals exceed 6 dB below the normal output level, and maintain an average +4 dBu output level for excessive signal levels up to 20 dB. An optional security cover (RU-MX4RS) is available to prevent user access to the rear panel switches. The RU-MX4 is electronically balanced. A factory installed output isolation transformer is available by ordering the RU-MX4T.

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Radio Design Labs RU-BR1 Mounting Bracket for RACK-UP Series
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Radio Design Labs DRA-35R DIN Rail Adapter for Rack-Up
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Usually ships in 7-14 business days.
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Click to download

Radio Design Labs RU-MX4
4-Input Microphone/Line Mixer

OUR PART #  RUMX4

Product Information:

Radio Design Labs' RU-MX4 is part of the group of RDL RACK-UP products. The compact design permits high-density installations, with threeproducts mounted in a single rack unit. The RU-MX4 may be used alone, or mounted using a wide variety of RACK-UP series options.

The RU-MX4 is the ideal choice in many applications where a combination of balanced mic and/or unbalanced line-level signals needs to be mixed. All balanced connections are made through XLR connectors. Unbalanced signals are coupled through phono jacks.

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.

Each of the four RU-MX4 inputs can accept either a balanced XLR mic or an unbalanced line-level phono input. Each MIC input accepts either a dynamic or a condenser microphone. A PHANTOM switch is located below each microphone input. These switches activate the phantom voltage and set the input preamplifier for the optimum gain range for the type of microphone. An integral high-pass filter rolls off frequencies below 80 Hz.

A separate unbalanced DIRECT input allows an external audio source to be summed directly into the mix amplifier, bypassing the front-panel input level controls. 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 RUMX4 mixers may be rack mounted in a single rack unit using an RDL RU-RA3HD rack adapter. A power interconnect cable is supplied with each RU-MX4 allowing the rack mounted mixers to run from a single 24 Vdc power supply.

The RU-MX4 provides one balanced output, switchable for mic or line level. The balanced XLR output and the unbalanced phono jack output may be used at the same time.

Audio levels are adjustable on the front panel. A convenient label area is provided below each fader knob. A label tab included with the mixer may be professionally labeled using a commercial lettering machine, or the user may write on the front of the mixer.

Each input channel is equipped with a front-panel dual-LED VU meter that follows standard VU ballistics. A green LED illuminates at 15 dB below the optimum input gain, becoming progressively brighter with increasing audio level. The adjacent red LED illuminates when the input gain exceeds the correct operating level.

The final mix is displayed on an LED string VU meter featuring a visually comfortable arc motion. The outputs may be fed directly from the final mix, or may be routed through the integral compressor/limiter. A rear-panel switch allows the soft-knee compressor to be switched in or out. When active, the compressor/limiter begins acting as signals exceed 6 dB below the normal output level, and maintain an average +4 dBu output level for excessive signal levels up to 20 dB. An optional security cover (RU-MX4RS) is available to prevent user access to the rear panel switches. The RU-MX4 is electronically balanced. A factory installed output isolation transformer is available by ordering the RU-MX4T.

Rack Adapter for (3) RACK-UP Series Modules
Radio Design Labs RU-RA3R Rack Adapter for (3) RACK-UP Series Modules
The RU-RA3R from RDL rack mounts (3) RACK-UP modules in fixed or mobile installations. Metal RACK-UP series products drop into the chassis, slide into position and are secured by tightening two screws provided with the RACK-UP product ...
56.25 75.25 25
In Stock
10.4" Rack Mount for 1 Rack-Up Series Product
Radio Design Labs RU-HRA1 10.4" Rack Mount for 1 Rack-Up Series Product
Radio Design Labs' Ru-HRA1 rack mounts 1 RACK-UP module or mounting frame for AMS accessories.  Fits 10.4" racks.Shipping Weight: 0.34 lbsPackage Dimensions: 2" x 2" x 12.25" (5.08 x 5.08 x 31.12 cm)
29.29 39.17 25
In Stock
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Mounting Bracket for RACK-UP Series
Radio 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.
33.83 39.92 15
Usually ships in 7-14 business days.
Need it sooner? Call us!
DIN Rail Adapter for Rack-Up
Radio Design Labs DRA-35R DIN Rail Adapter for Rack-Up
The DRA-35R provides DIN rail mounting for any RDL RACK-UP® or MAX RACK-UP module, allowing full access to the front and rear panels of the mounted modules. The DRA-35R attaches to a 35 mm DIN Rail. 
17.27 20.38 15
Usually ships in 7-14 business days.
Need it sooner? Call us!

Click to download

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