The Fosi Audio DS1 is a mini USB-C DAC/amp that handles DSD512 and 32-bit/768kHz decoding in a dongle-sized body needing no external power. It's built for phone-and-IEM listeners who want proper decoding without a pocket brick, and doubles as a travel companion for a laptop.
Who the Fosi Audio DS1 is for
Phone and IEM listeners: Plugged into a phone's USB-C port, it bypasses the built-in audio path and gives wired IEMs proper decoding without adding a brick to your pocket.
Laptop travelers: Dongle-sized and needing no external power, it rides along in a laptop bag with no power supply to pack.
DAP owners: Keep it in the bag as a backup source for when your main player is charging.
Hi-res file collectors: Decoding runs up to DSD512 and 32-bit/768kHz, covering high-resolution files up to those formats.
Skip it if: you only listen over Bluetooth; the DS1 is a USB-C dongle that drives the wired headphones and IEMs plugged into it.
Fosi Audio DS1 key specs
Type: Mini USB-C DAC and headphone amplifier
Decoding: DSD512, 32-bit/768kHz
Connector: USB-C
Power: No external power needed
Form factor: Dongle-sized, portable
Color: Black
Genuine Fosi Audio stock. Free shipping on every order and 45-day returns.
Fosi Audio DS1 vs similar options
vs SMSL D10: Decodes up to 32-bit/384kHz PCM and native DSD256, short of the DS1's 32-bit/768kHz and DSD512; pick the DS1 if your library includes DSD512 or 768kHz files.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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