Neumann N149A

The Neumann N 149 A is a dedicated high-performance power supply designed for Neumann M 147 Tube, M 149 Tube, and M 150 Tube microphones. It provides all required operating voltages, including capsule polarization, tube heating, and microphone circuitry power, ensuring optimal performance and reliability. Featuring a universal 100–240 V power input, an 8-pin microphone connection, and a balanced XLR-3 male audio output, the N 149 A is an essential component for professional tube microphone systems.

The Neumann N 149 A is a professional-grade external power supply engineered specifically for Neumann's renowned tube microphone models, including the M 147 Tube, M 149 Tube, and M 150 Tube. Designed to deliver stable, low-noise power for critical recording applications, the N 149 A ensures that these premium microphones operate at their full sonic potential.

The power supply generates and regulates all voltages required by the connected microphone, including the capsule polarization voltage, tube heater voltage, and additional operating voltages for the microphone’s internal circuitry. A sophisticated sensor-controlled tube heating circuit continuously monitors and regulates the heater voltage, helping maintain consistent performance and extending tube life.

To further protect the microphone, the N 149 A incorporates a controlled constant-current startup system that provides a smooth warm-up sequence for the vacuum tube. This gradual startup minimizes stress on the tube and contributes to long-term reliability.

The unit accepts worldwide mains voltages from 100 V to 240 V at either 50 Hz or 60 Hz via a standard IEC 320 power connector, making it suitable for international studio installations and mobile recording environments. The microphone connects through an 8-pin DIN connector, while the audio signal is delivered via a balanced XLR-3 male output for professional interfacing with microphone preamps, mixing consoles, and recording systems.

The N 149 A supports microphone connection cable lengths of up to 100 meters using the Neumann KT 8 cable and audio output cable lengths of up to 300 meters without compromising performance, making it ideal for large studios, scoring stages, broadcast facilities, and remote recording applications.

Built to Neumann’s exacting standards, the N 149 A provides the reliability, stability, and audio integrity required for world-class recording environments.

Key Features

• Dedicated power supply for Neumann tube microphones
• Compatible with M 147 Tube, M 149 Tube, and M 150 Tube microphones
• Provides capsule polarization voltage, tube heating voltage, and operating voltages
• Sensor-controlled tube heater regulation
• Constant-current soft-start circuit for smooth tube warm-up
• Universal power input (100–240 V, 50/60 Hz)
• Professional balanced XLR-3 male audio output
• 8-pin DIN microphone connection
• Supports microphone cable lengths up to 100 m
• Supports audio cable lengths up to 300 m
• Low-noise, high-stability power design
• Suitable for professional studio, broadcast, and remote recording applications