RU-MLA2T

RDL RU-MLA2T - Dual Microphone / Line Preamplifier with Output Transformers

The RDL RU-MLA2T is a professional dual-channel audio preamplifier designed to handle both microphone and line-level signals. Each channel can be independently configured for MIC or LINE input and output. Inputs and outputs are available on front-panel XLR connectors and rear-panel terminal blocks, both active simultaneously.

Each input features rear-panel switches for MIC/LINE selection, LO/HI mic gain, and 24V phantom power (IEC 61938:2013). Outputs are active balanced and equipped with studio-grade audio transformers. Independent gain trim and dual LED VU meters per channel allow precise level control. The unit can operate as a stereo preamp or two separate mono preamps.

Functionality

• Dual-channel audio preamplifier with independent input/output configuration
• MIC or LINE selectable inputs and outputs per channel
• Switchable 24V phantom power for each input
• LO and HI mic gain modes for dynamic and condenser microphones
• Front-panel gain trim and LED VU meters per channel
• Transformer-balanced outputs for studio-grade performance
• Simultaneous front (XLR) and rear (terminal block) I/O
• Operates as stereo or dual mono preamp

Features

• Device type: dual microphone/line preamplifier with output transformers
• Inputs: 2x XLR (front), 2x terminal block (rear)
• Input levels (for +4 dBu output):
  • 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
  • LINE: >10 kΩ balanced (unbalanced compatible)
• Outputs: 2x XLR (front), 2x terminal block (rear)
• Output impedance: 150Ω balanced
• Gain:
  • MIC LO: up to 52 dB
  • MIC HI: up to 69 dB
  • LINE: up to 20 dB
• Frequency response:
  • MIC: 80 Hz - 50 kHz (±0.75 dB), <10 dB at 20 Hz (high-pass filter)
  • 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 LINE output
• Power supply: 24V DC, 80 mA
• Operating temperature: 0°C to 55°C

RDL RU-MLA2T is a flexible and high-performance solution for AV professionals requiring independent channel configuration, phantom power, and transformer-balanced outputs. Ideal for sound reinforcement, broadcast, studio, and conferencing applications.