Fosi Audio PSU20 Linear Power Supply

Name: Fosi Audio PSU20 Linear Power Supply
Rating: 4.71 (7 reviews)

€239.99

7 total reviews

Features

Power Three Devices Simultaneously
Reduce Noise with 0.1mV Ripple
Isolate Power Across 3 Channels
Switch Between 5V, 12V & 15V

Shipping to: EU

EU
UK

Product variants

Lower Noise. Blacker Background.

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.

Power Three Devices Simultaneously

With dual DC outputs and a USB-A output, the PSU20 can power your entire audio system from a single source. Included DC-to-DC cables eliminate bulky power adapters and messy wiring, simplifying your setup and reducing cable clutter.

Fully Isolated Outputs

Each output features its own dedicated rectification, filtering, regulation, and protection circuitry, ensuring clean, stable power delivery without interference between connected devices.

Simplify Connection

Simplify your power adapter in one step, easier and neater cable management.

Perfect Match for Fosi Gear

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

Smart Cooling. Ultra Quiet.

A custom low-noise cooling fan automatically activates at 55°C, operating at just 30dB. Efficient thermal management keeps the PSU20 running cool and stable during extended listening sessions.

Multiple Protections

Supports over-temperature, over-voltage, and over-current protection to safeguard your connected audio equipment and ensure reliable system operation.

80W Toroidal Transformer

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

Nippon Chemi-Con Capacitors

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

High-Reliability Rectifier

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

4-Core Regulation

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

Product details

Description

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.

Specifications

Power Input
AC: 115V / 230V
Note:
115V setting supports 100–120V input
230V setting supports 220–240V input
Power Output
DC 1: 12V / 15V (Rated Power: 20W)
DC 2: 12V / 5V (Rated Power: 15W)
USB: 5V / 1A (Rated Power: 5W)
Operating Temperature
-20 ~ 40°C (-4°F ~ 104°F)
Temperature Rise Test
Temperature rise of 25°C (77°F) at full load

What‘s in the box？

Fosi Audio PSU20*1
1.2m (47.2 in) DC-DC Power Cable*1
0.3m (11.8 in) DC-DC Power Cable*1
User Manual*1
AC Power Cord*1

5 stars: 5 (71%)
4 stars: 2 (29%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Gut verarbeitet, schnelle Lieferung, angemessener Preis. Kann ich empfehlen!
Vielen Dank nach China

Fosi Audio PSU20 Linear Power Supply

I used it to power my Fosi ZH3 and S3. It helps simplify the connection to power, One plug less and so far seems pretty good.

Block of energy

The powerhorse of Fosi near to corefusion

Fosi Audio PSU20 Linear Power Supply

Multi inputs

Good variety of inputs and sound quality for the price.

Great Product, Noticeable Difference in my System

I have this powering my LAIV Micro Dac, before and after comparison, i can say that now I can hear more instrument separation and definition and owing to a lower noise floor the soundstage got expanded noticeably. Thanks Fosi Audio for yet another great value product!

Fosi Audio PSU20 Review

I hooked up PSU20 to Fosi ZD3 DAC and Fosi X5 Phono preamp - both take 12V DC. For Fosi ZD3, I can sense minor improvement in noise floor (I was using iFC 12V adaptor before). For phono premap, I don't think I get sense any difference from the generic SMPS power supply that came with the unit.

The PSU20 is heavy, and I like the versatility for the output options - dual out with 12V, 15V and 5V options. I might upgrade my phono amp that takes either 12V or 15V, and see if the PSU20 makes any difference.