RME LNI-2 DC Low Noise Isolating Filter 12V 2A DC Input & Output for Clean Power in Pro Audio Systems

RME presents the LNI-2 DC, a spectacular active DC filter, compact and portable, milled from a solid block of aluminum. The LNI-2 DC provides isolation, regulation and filtering of output signals from any 12 volt DC power source, enabling a remarkable improvement in DC voltage stability while providing an ultra-clean 12V power source. This results in an enhanced audio signal and sound quality avoiding humming, buzzing and other noises that can be caused by power supplies or dirty mains power.

FEATURES

• Ultra-Low Noise Output
  Delivers a clean 12V DC output with noise levels below 2 µV, ensuring high-fidelity audio performance.

• Galvanic Isolation
  Prevents noise, hum, and leakage currents by electrically isolating the input and output, maintaining signal purity.

• Advanced µFilter Technology
  Features a discrete ultra-low noise linear regulator with soft start, thermal overload, short-circuit protection, and sensor-based stabilization.

• Wide Input Voltage Range
  Accepts DC input from 9–18V, providing flexibility for various power sources.

• Compact and Durable Design
  Housed in a solid aluminum block, measuring 80 x 30 x 123 mm and weighing 605 g, ensuring portability and longevity.

• Enhanced Audio Quality
  Reduces humming, buzzing, and other noise artifacts, improving overall sound clarity in professional audio systems.

• Grounding Options
  Includes a ground terminal screw for optional connection to PE or other device grounds, addressing ground loop issues.

SPECIFICATIONS

DC Input

• Input voltage range: 9 – 18 V DC
• Polarity: Center +, Outside –
• Connector: 2.1×5.5mm, lockable or normal
• Power consumption idle: 0.7 Watt
• Power consumption typical, 12V input, 2 A load: 31 Watts

DC Output μFilter

• Output voltage: 12.0 V
• Continuous output current: 2.0 A
• Continuous output power: 24 Watt
• Maximum output current: 3.0 A
• Noise @ 0 – 3 A, AES17: < 2 μV, < 1 μV A-weighted
• Noise @ 0 – 3 A, 100 kHz bandwidth: <3 μV, < 2 μV A-weighted
• Output impedance including cable: 0.012 Ohm
• Load Regulation (0/1/2 A): 0.20 %
• Overload protection: > 3.0 A
• Overheating protection: > 80 °C (176 °F)
• Undervoltage detection: < 9.0 V
• Short circuit current (LED red): <0.1 A
• Filter (decoupling) efficiency, 10 Hz – 1 kHz: >110 dB
• Filter (decoupling) efficiency, 1 kHz – 200 kHz: >70 dB

General

• Dimensions (WxHxD): 80 x 30 x 123 mm, 3.15“ x 1.18“ x 4.84“
• Weight: 605 g (1.33 lbs)
• Temperature range: +5 °C up to +40° Celsius (41 °F up to 104 °F)
• Relative humidity: < 75%, not condensing

Package Contents

• LNI-2 DC
• DC Sensor connection cable with lockable DC plug 2.1×5.5 mm, 1 m
• DC Sensor connection cable with DC plug 2.1×5.5 mm, 1 m
• Manual