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RU-MLD4T Microphone / Line Distribution Amplifier - 1x4 with transformer

  • Distribution Amplifier with Four Outputs
  • Front Panel XLR Input / Output Jacks
  • Detachable Input / Output Terminal Blocks
  • Switch-selectable Mic or Line Input
  • Switch-selectable Mic Gain and Phantom
  • Gain Trim on Input
  • Each Output Switch-selectable Mic or Line
  • RU-MLD4T
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The RU-MLD4 is a four channel audio distribution amplifier. The input and all four outputs may be connected through the front-panel XLR jacks or on the rear panel detachable terminal blocks. The input accepts either a balanced microphone or line level signal. Each of the four outputs provides either a microphone or line level signal. Both the front-panel XLR connectors and the rear-panel terminals are active at all times.

The audio input is equipped with a rear-panel switch to select between MIC and LINE level. Two additional switches allow setting the MIC input for LO or HI gain and for enabling or disabling standard 24 Vdc phantom. The two microphone gain settings allow the connection of a wide variety of dynamic and condenser microphones. Each output is provided with a separate rear-panel switch to set the associated level to either MIC or LINE. Audio outputs are isolated from each other and may be wired balanced or unbalanced. Gain trim is provided on a front-panel control. An RDL Dual-led VU meter is provided above the gain trimmer. The meter is calibrated to indicate +4 dBu for outputs set to line level. The rear panel provides a detachable terminal block and a power input jack to connect 24 Vdc power. Each output of the RU-MLD4T is equipped with a studio-quality audio output transformer.

Tech Tips

The Versatile RU-MLD4 Audio Distribution Amplifier

Inputs:
XLR(front); detachable term block(rear)
Input level (for +4 dBu output):
Switch-selectable (rear panel) MIC/LINE
  Mic:
-48 dBu to -3 dBu (LO GAIN); -65 dBu to -20 dBu (HI GAIN)
  Line:
-15 dBu to +28 dBu

Input Impedance:
  Mic:
2 kΩ balanced, switchable 24 V phantom (IEC 61938: 2013)
  Line:
> 10 kΩ balanced; may be connected unbalanced
Outputs (4):
XLR(front); detachable term block(rear)
Output level:
Switch-selectable (rear panel) MIC/LINE
Output Impedance:
150 Ω balanced
Gain Trim:
Front panel adjustable
  Mic:
Off to 52 dB gain (LO GAIN); Off to 69 dB gain (HI GAIN)
  Line:
Off to 20 dB gain

Frequency Response:
  Mic:
80 Hz to 50 kHz (± 0.75 dB); < 10 dB @ 20 Hz (integral high-pass filter)
  Line:
15 Hz to 50 kHz (± 0.1 dB)
THD+N:
< 0.1% (Mic); < 0.005% (Line)
CMRR:
> 60 dB (Mic); > 50 dB (Line)

Residual Noise (below +4 dBu LINE output or -45 dBu MIC output):
  Mic:
-79 dB (50dB Gain); -70 dB (Mic 60dB Gain)
  Line:
-85 dB
Headroom:
> 20 dB (above +4 dBu LINE output)
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 90 mA
Package Type:
Cardboard Box
Package Dimensions:
6 x 6 x 2.625 in.
Shipping Weight:
2.375 lbs.
WEEE weight:
2.12 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
Format
DXF
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High Res Images:
Format
TIF
Declaration of Conformity:
Format
PDF

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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-MLD4T RU-MLD4T