RU-MLA2

RDL RU-MLA2 - Dual Microphone / Line Preamplifier

The RDL RU-MLA2 is a dual-channel audio preamplifier designed for professional AV, broadcast, and sound reinforcement applications. It allows independent processing of two audio channels, accepting either microphone or line-level signals, and delivering either mic or line-level outputs.

Inputs and outputs are available on both front-panel XLR connectors and rear-panel detachable terminal blocks, all active simultaneously. Each input features rear-panel switches for MIC/LINE selection, LO/HI mic gain, and 24V phantom power. Outputs are also switch-selectable between MIC and LINE levels and can be wired balanced or unbalanced.

Functionality

• Independent dual-channel audio preamplification
• MIC/LINE input and output selection
• LO/HI mic gain settings and 24V phantom power
• Front-panel gain trim with LED VU meters
• Rack-mountable with optional reverse mounting

Features

• Device type: dual microphone/line preamplifier
• Inputs: 2x XLR (front), 2x terminal block (rear)
• Input levels:
  • MIC LO GAIN: -48 dBu to -3 dBu
  • MIC HI GAIN: -65 dBu to -20 dBu
  • LINE: -15 dBu to +28 dBu
• Input impedance:
  • MIC: 2 kΩ balanced, 24V phantom (IEC 61938:2013)
  • LINE: >10 kΩ balanced (unbalanced compatible)
• Outputs: 2x XLR (front), 2x terminal block (rear)
• Output impedance: 150 Ω balanced
• Gain:
  • MIC LO GAIN: up to 52 dB
  • MIC HI GAIN: up to 69 dB
  • LINE: up to 20 dB
• Frequency response:
  • MIC: 80 Hz - 50 kHz (±0.75 dB), <10 dB @ 20 Hz (HPF)
  • LINE: 15 Hz - 50 kHz (±0.1 dB)
• THD+N: <0.1% (MIC), <0.005% (LINE)
• CMRR: >60 dB (MIC), >50 dB (LINE)
• Residual noise:
  • MIC: -79 dB (50 dB gain), -70 dB (60 dB gain)
  • LINE: -85 dB
• Headroom: >20 dB above +4 dBu
• Power: 24V DC, 80 mA
• Operating temperature: 0°C to 55°C

The RDL RU-MLA2 is a precise and flexible preamplifier ideal for stereo or dual mono applications, offering high-quality signal processing and versatile integration options.