FOSI AUDIO PSU20 Linear Power Supply 40 watt

40W Rated Strong Power

Multiple voltage levels and various interfaces, flexibly compatible with a variety of devices.

Unlike switching power supplies, the PSU20 produces a simpler, more controllable noise spectrum. Combining premium Nippon Chemi-Con capacitors with a Texas Instruments quad-core linear regulation design, it reduces ripple noise and delivers a cleaner background for high-fidelity audio systems.

Purpose-built for Fosi Audio components, the PSU20 offers seamless compatibility and a unified design that fits naturally into your system.

Custom pure copper toroidal transformer with up to 100W peak output ensure stable power delivery, even with three devices connected.

Premium capacitors help minimize ripple and noise, with ripple as low as 0.1mV.

A GBU806 rectifier bridge rated at 600V/8A ensures fast, stable AC-to-DC power conversion.

Powered by three LM1085IT and one ST78M05 linear regulator from Texas Instruments.

Power Three Devices Simultaneously
With dual DC outputs and one USB-A output, the PSU20 can power up to three audio devices from a single source.

Flexible Compatibility
Supports selectable 5V, 12V, and 15V outputs, making the PSU20 compatible with CD transports, DACs, headphone amplifiers, and preamps.

3 Fully Isolated Outputs
Each output has its own dedicated rectification, filtering, regulation, and protection circuitry to deliver clean, stable power without interference between connected devices.

0.1mV Ultra-Low Ripple
With ripple as low as 0.1mV, the PSU20 helps reduce ripple noise and deliver a cleaner background for high-fidelity audio systems.

Engineered for Stable Long-Term Use
A custom low-noise fan activates at 55°C and operates at just 30dB, while over-temperature, over-voltage, and over-current protection help safeguard connected audio equipment.