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Fosi Audio Fosi Audio DS1 Dongle DAC Headphone Amplifier
- Small USB DAC headphone amplifier with optimized HiFi audio architecture ensures High-Resolution sound quality. The portable USB DAC DS1 is compatible with various systems like Android/iOS/Windows/Mac, compatible with the latest devices: phones/computers/tablets/laptops/audio players, etc. Wonderfully versatile when commuting in the home, office, or gaming.
- DS1 adopts ESS Technology ES9038Q2M DAC Chips supporting DSD 512 and 32Bit/768kHz PCM, features best-in-class specifications, and high-power outputs capable of supporting the most demanding of headphones with impedance above 200Ω.
- Low Noise Floor Clean Sound for True High-Fidelity. DS1 features abundant power with a high signal-to-noise ratio, low distortion, and almost 0 noise.
- 3.5MM+4.4MM Dual Headphone Outputs are both Powerful enough to easily drive most headphones. The traditional 3.5mm single-ended headphone output is widely compatible with most headphones, and a 4.4mm balanced headphone output for a more detailed audio experience. Specifications: THD+N<0.0006%, output power up to 220mw, SNR>120dB, Noise<1.6UV.
- What You Get: DS1 USB DAC Headphone Amp x1, Type-C to Type-C cable x1, USB-A to USB-C Converter x1, user manual x1, our worry-free 24-month warranty, and friendly customer service. NOTE: The new version of the DS1 headphone amp optimized the volume control which is independently controlled from the audio source device.
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Professional Reviews 87/100
Nicely Roasted
Sound Quality
87/100
Build Quality
83/100
Features Usability
91/100
Value for Money
85/100
Fosi Audio’s DS1 brings punchy, controlled bass, a warmly natural midrange and a notably clean, hiss-free background to portable listening. The Honest Audiophile found its detailed, intimate presentation especially rewarding with IEMs, while 3.5mm and 4.4mm outputs add welcome flexibility for a compact USB-C setup.
What Reviewers Are Saying
Pros
Engaging, controlled mid-bass delivers strong impact, slam, punch and texture.
Quiet, low-noise performance with no reported hiss or popping makes it an excellent IEM partner.
Natural, warmly weighted tonality combines good detail and resolution with convincing timbre.
Offers both 3.5mm single-ended and 4.4mm balanced outputs, plus dedicated volume controls.
&
Cons
Compact, intimate soundstage can feel cramped on busy or grand-scale recordings.
Treble is slightly soft and rolled off, with less top-end sparkle and bite.
Not an ideal driver for demanding planars or headphones around 150 ohms and above.
SOUND QUALITY PERFORMANCE 87/100
The DS1 is described as a clean, warmly natural-sounding dongle with very good detail, controlled bass impact and convincing depth. Its presentation is more intimate than spacious, with a gently softened top end, while its drive limits narrow its appeal for demanding full-size headphones.
Transparency Resolution
87/100
The reviewer found detail and resolution very good for the price, without missing images or small musical information. Good layering and precise placement also support a clear, coherent presentation, though the compact stage keeps it from sounding especially open.
Tonal Balance Musicality
89/100
The DS1 has a fun, engaging character with a natural warm tint, pleasing tone and convincing timbre. Treble extension is said to be sufficient for engagement, but slightly soft and rolled off, lacking some bite and sparkle.
Dynamics
88/100
Bass is praised for its impact, slam, punch, texture and control, particularly through the mid-bass. The reviewer describes the result as powerful and clean rather than strained, although demanding headphones expose limits in available output.
Noise Floor
91/100
The reviewer reports no hiss, popping or similar noise issues, describing the DS1 as a very clean dongle. Its low output impedance and quiet behavior appear especially well suited to IEM listening.
Headphone Compatibility
82/100
It powered the reviewer's IEMs successfully and handled easier over-ear headphones at listenable levels. However, planar headphones and models around 150 ohms or above were not driven convincingly, making this a better match for IEMs and efficient headphones than difficult full-size loads.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
83/100
The reviewer describes a metal-bodied unit weighing roughly 40 grams, with a notably substantial, chunky feel for a dongle. There is little direct commentary on controls, connector durability or long-term reliability.
Features Usability
91/100
The compact USB-C DAC/amp provides both 3.5 mm single-ended and 4.4 mm balanced headphone outputs, dedicated volume buttons and an LED status indicator for format and sample-rate information. It also supports high-resolution PCM and DSD playback, giving a phone or computer a capable, straightforward portable audio interface.
Value for Money
85/100
The review identifies an $80 asking price but does not directly compare the DS1's value with competing dongles. Its generous output options, clean IEM performance and strong detail are notable at that price, though the reviewer does not make an explicit value verdict.
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Authorized dealers for Fosi Audio Fosi Audio DS1 Dongle DAC Headphone Amplifier
- Acoustic Technologies — online and in-store — Montréal, Québec, Canada (website)
- Altitudo Audio — online and in-store — Winnipeg, Manitoba, Canada (website)
- Apos Audio — online and in-store — Oakland, California, United States (website)
- Audeos — online and in-store — Żywiec, Województwo śląskie (website)
- Audio 46 — online and in-store — New York, New York, United States (website)
- Audio Domain — online and in-store — Stadtbezirke I, Nordrhein-Westfalen, Germany (website)
- Audio Magic - EU — online and in-store — Wola, Województwo mazowieckie, Poland (website)
- AUDIOPHONICS — in-store — Bordeaux, Nouvelle-Aquitaine, France (website)
- AV Cables — online and in-store — Hornsyld, Denmark (website)
- B&H Photo — online and in-store — New York, New York, United States (website)
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