Fosi Audio PSU20 40W Linear Power Supply 5 V / 12 V / 15 V

Highlights of the Fosi Audio PSU20

• 40W rated linear power supply with up to 100W peak output
• Dual DC outputs plus USB-A output for powering up to three devices simultaneously
• Selectable 5 V, 12 V and 15 V output options
• Fully isolated output channels with dedicated regulation and protection circuitry
• Ultra-low ripple noise down to 0.1 mV for a cleaner audio background
• Low-noise cooling fan activates at 55°C and operates at just 30 dB

Product details Fosi Audio PSU20

Fosi Audio PSU20 40W Linear Power Supply 5 V / 12 V / 15 V

The Fosi Audio PSU20 is built for clean and organised power delivery in compact hi-fi systems. As one of the most flexible power supplies for desktop audio setups, it combines two DC outputs with one USB-A output, allowing you to power three devices from a single unit and reduce bulky adapters and cable clutter.

Its linear power design uses a custom pure copper toroidal transformer, premium Nippon Chemi-Con capacitors, a high-reliability GBU806 rectifier bridge and linear regulation based on three LM1085IT regulators plus one ST78M05 regulator. Each output has its own rectification, filtering, regulation and protection circuitry, helping to isolate connected equipment and reduce interference between devices.

The PSU20 supports selectable 12 V / 15 V on DC 1, 12 V / 5 V on DC 2 and 5 V / 1 A via USB, making it suitable for compatible CD transports, DAC converters, headphone amplifiers and preamps. It is purpose-built for Fosi Audio gear, with a unified design that fits naturally into a matching audio system. No individual supported model names are specified for hyperlinking, so compatibility should be checked by voltage, current and connector requirements.

For long-term stability, the PSU20 includes over-temperature, over-voltage and over-current protection. Its low-noise fan activates at 55°C and runs at just 30 dB, while the operating temperature range is -20°C to 40°C.