STM-DA3

RDL STM-DA3 - 1x3 Microphone Level Distribution Amplifier

The RDL STM-DA3 is a compact 1x3 microphone distribution amplifier designed for professional AV, broadcast, and studio applications. It splits one microphone signal into three isolated outputs, providing both electrical and audio isolation between channels.

The 1.2 kΩ balanced input accepts a wide range of mic levels without loading low-impedance microphones. A multi-turn gain trimmer allows precise adjustment to match system standards. The dual-LED VU meter helps set optimal operating levels without external test equipment.

STM-DA3 delivers studio-quality performance with ultra-low noise and distortion, excellent phase response, and high headroom. It supports dynamic and condenser microphones, with 24 V phantom power available via the PHM terminal.

Functionality

• Splits one microphone signal to three independent outputs
• Electrical and audio isolation between outputs
• Gain adjustment: ±17 dB from unity gain
• Dual-LED VU meter for optimal level setting
• Supports dynamic and condenser microphones
• 24 V phantom power via PHM terminal

Product Features

• 1 balanced mic input (1.2 kΩ)
• 3 balanced mic outputs - fully isolated
• Multi-turn gain trimmer for precise adjustment
• Dual-LED VU meter: green (below optimum), red (above optimum)
• Ultra-low noise and distortion
• Excellent phase response
• RF protection on input and outputs
• Short-circuit protection on outputs
• Compact STICK-ON® housing - easy AV integration
• Power: 24 V DC

STM-DA3 is a reliable solution for audio professionals needing compact, high-performance microphone signal distribution.