Fosi Audio PSU20

The Fosi Audio PSU20 Linear Power Supply is a high-quality linear power supply designed for demanding Hi-Fi systems. Unlike standard switching power supplies, the PSU20 delivers an extremely clean and stable power supply with ultra-low ripple of just 0.1 mV. This results in a quieter background, less electrical interference, and a more accurate reproduction of musical details.

Thanks to its adjustable output voltages of 5V, 12V, and 15V, the PSU20 is highly versatile and can be used with various audio components such as DACs, headphone amplifiers, preamplifiers, and CD transports. With three fully isolated outputs, multiple devices can be powered simultaneously without mutual interference or distortion.

Inside, the PSU20 uses high-quality components, including a powerful 80W toroidal transformer, premium Nippon Chemi-Con capacitors, and an advanced linear regulation circuit based on Texas Instruments regulators. This combination ensures extremely stable voltage, lower noise, and optimal performance of connected audio equipment.

Each of the three outputs has its own rectification, filtering, regulation, and protection circuit. This keeps the power supply clean and reliable, even when multiple devices are connected at the same time. The included DC cables also ensure a neat installation without loose power adapters and reduce cable clutter in the audio system.

For long-term reliability, the PSU20 is equipped with comprehensive protections against overheating, overvoltage, and overcurrent. The intelligent silent fan automatically activates when additional cooling is needed and remains virtually inaudible during operation at only about 30 dB.

The Fosi Audio PSU20 is therefore an ideal upgrade for any music lover who wants to get the most out of their Hi-Fi equipment. A cleaner power supply allows DACs, amplifiers, and other audio components to operate more stably and benefit from a quieter signal environment.