Fosi Audio PSU20 Linear Power Supply

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!

Works well for one piece of equipment- not at all well with another.

While the PSU20 seems fine with a iFi Audio Zen streamer (15v), it most certainly had a negative effect on the quality of sound in the Laiv Audio uDDC it powered (5v). The degradation of sound quality was noted by multiple people and was not subtle. With the Laiv uDDC, powered by the Fosi PSU20, the sound produced was flat, compressed, muddy, uninteresting and nearly unlistenable. Instruments and voices lacked proper timbre and simply didn’t sound right. It resulted in a poor listening experience. As always, your results may vary. I was excited to have one PSU to power both the streamer and the uDDC- but was disappointed.

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.