Fosi S3 Streamer Preamp- Vintage Audio Review Episode #223
In this episode I look at the performance & features of the Fosi S3 Streamer/Preamp. Here is a link to the S3 on Fosi’s website: https://fosiaudio.com/products/s3-bal... UPDATE- Fosi's latest firmware/app update (6/17/26) fixed the problem with only showing 31 Files/Folders when viewing the UPnP (NAS) drive! However, using the Search Menu still caused my NAS drive to hang up requiring unplugging the power to it for a few seconds. 00:00 Introduction 04:40 Preamp THD/ SNR & harmonics (Unbalanced inputs & outputs) 05:37 Preamp THD vs Freq & Input Signal Level 06:41 Preamp System Noise 07:10 Preamp Frequency Response 07:49 Preamp Multitone 08:02 IMD 08:25 Crosstalk 08:48 THD/ SNR & harmonics via Streamer (via UPnP) using the Unbalanced outputs 09:48 THD/ SNR & harmonics via Streamer (via UPnP) using the Balanced outputs 11:50 Frequency Response harmonics via Streamer (via UPnP) using the Unbalanced outputs 14:02 Subwoofer Out Freq response 14:29 Volume control changes 15:32 Phase & Risetime 17:08 The S3 App “tour” 21:18 Listening & Final Comments
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