Precision Audio and AV Interface Products

Radio Design Labs

RU-MX4LT Professional 4 Channel Line Level Mixer with Transformer - Microphone and line output

  • 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 RU-MX4
  • Output Isolation Transformer (RU-MX4LT)
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The RU-MX4L 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 RU-MX4L 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 RU-MX4L may connect to the unbalanced input of other equipment, or may be connected to the DIRECT input of another RU-MX4L or an RU-MX4 to expand mixing capabilities. The RU-MX4L 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 RU-MX4LT.

Balanced Line Inputs(4):
20 kΩ balanced bridging
Balanced Line Input Level:

-13 to +22 dBu for +4 dBu output
Unbalanced Line Inputs (4):

2 kΩ 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
Ambient Operating Environment:
0° C to 50° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 150 mA,
Package Type:
Cardboard Box
Package Dimensions:
6 x 6 x 2.625 in.
Shipping Weight:
1.84 lbs.
WEEE weight:
1.565 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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High Res Images:
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Declaration of Conformity:
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RACK-UP SERIES

RACK-UPs are the original 1/3 rack width 1RU rack-mountable modules for the A/V, recording and broadcast industries. Module functions include mixing, switching, pre-amplification, power amplification, distribution, gain control, equalization and more. Some RACK-UP modules are constructed in solid encapsulated durable industrial black plastic enclosures; MAX RACK-UPs are assembled using heavy duty extruded aluminum and steel panels. The rear panels feature clear bold white lettering for the terminal blocks and connectors. Reverse-printed front-panel polycarbonate laminates provide an attractive, durable finished appearance for rack-mounted or free-standing use.

Since RDL first originated 1/3 rack width modules, RACK-UPs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple RACK-UP modules may be interconnected, or may be connected with other RDL modules to form all or part of an A/V system. Certain RACK-UP modules are often used free standing; all RACK-UPs may be rack mounted. A complete range of mounting options is available for systems comprised of multiple modules.

RACK-UP modules provide input, output and control connections through terminal blocks and connector (or both) according to common usage in professional installations. Front panels are equipped with connectors, user controls and LED metering, as appropriate.

Functions and features provided by RACK-UPs, since their introduction, are still available today. This continuity in product offering and support makes RACK-UP modules a preferred long-term resource for system design solutions. RACK-UP SERIES modules are designed and manufactured in the U.S.A.

RU-MX4LT RU-MX4LT