Fosi Audio (brand)
Fosi Audio is a Chinese hi-fi brand founded in 2015 that helped kick off the modern budget-audiophile Class-D revolution. Known for the V3 monoblock, BT20A series, ZA3, and the S3 streamer/DAC/preamp combo.
Fosi Audio is a Chinese hi-fi brand that emerged around 2015 and quickly became a leader in the budget Class-D amplifier segment. Along with AIYIMA and SMSL, Fosi is one of the “big three” Chinese hi-fi brands driving the current wave of high-value hi-fi.
Signature products
- Fosi V3 monoblock – dual TPA3255, cult-favorite among audiophiles
- Fosi BT20A MAX – Bluetooth stereo Class-D with USB-C DAC
- Fosi ZA3 – balanced dual-mode (stereo/mono) Class-D
- Fosi Audio S3 – streamer/DAC/preamp with WiFi 6, Roon Ready, HDMI eARC
- Fosi SP601 – passive bookshelf speakers
- Fosi DS3 – portable USB DAC/headphone amp
Design philosophy
Signature orange volume knob, compact form factors, Class-D efficiency, aggressive pricing. Not all products are equally polished but the core amps (V3, ZA3, BT20A MAX) are consistently well-regarded.
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