Fosi Audio PSU20 – Hi-Fi Linear Power Supply – 5V/12V/15V – 3 Outputs

Fosi Audio PSU20 – Hi-Fi Linear Power Supply – 5V/12V/15V – 3 Outputs

The Fosi Audio PSU20 is a high-quality linear power supply designed to provide clean, stable, and ultra-low noise power to Hi-Fi audio components. It can simultaneously power up to three devices thanks to two DC outputs and one USB-A output, making it a particularly practical solution for setups including a DAC, preamplifier, headphone amplifier, CD transport, or other compatible audio devices.

At the heart of the PSU20 is an 80W pure copper toroidal transformer, capable of delivering up to 100W peak power. This design ensures stable power even when multiple devices are connected simultaneously.

To minimize electrical noise that can affect sensitive audio equipment, Fosi Audio uses Nippon Chemi-Con capacitors and an architecture that achieves extremely low ripple, down to 0.1 mV. The three outputs are fully isolated from each other and each have their own rectification, filtering, regulation, and protection circuits. This design reduces interference between different connected devices.

The PSU20 offers excellent flexibility with its selectable output voltages. The first DC output provides 12V or 15V with a maximum rated power of 20W, while the second DC output provides 12V or 5V up to 15W. An additional USB-A output delivers 5V / 1A, up to 5W.

Safety and reliability are also central to the design. The PSU20 integrates protections against overheating, overvoltage, and overcurrent. A silent fan activates when the temperature reaches 55°C and operates at only approximately 30 dB to maintain a quiet listening environment.

Main Features:

• High-quality linear power supply designed for Hi-Fi audio systems
• Can simultaneously power up to three devices
• Two DC outputs and one USB-A output
• Fully isolated outputs to reduce interference between devices
• 80W pure copper toroidal transformer with peak power up to 100W
• Ultra-low ripple down to 0.1 mV for clean and stable power
• High-quality Nippon Chemi-Con capacitors
• Selectable DC output 1: 12V / 15V, rated power 20W
• Selectable DC output 2: 12V / 5V, rated power 15W
• USB-A output: 5V / 1A, rated power 5W
• Selectable AC input 115V / 230V
• Compatible with DACs, CD transports, headphone amplifiers, preamplifiers, and other compatible audio devices
• Overheat, overvoltage, and overcurrent protections
• Silent fan automatically activated at 55°C
• Operating temperature from -20°C to 40°C

Package Contents:

• 1x Fosi Audio PSU20
• 1x DC-DC power cable 1.2 m
• 1x DC-DC power cable 0.3 m
• 1x AC power cord
• 1x User manual