Fosi Audio C3 Gaming DAC Amp for PC, USB Headphone Amplifier with 7.1 Surround Sound, Desktop Volume Control, Footstep Enhancement, Compatible with PS5, Switch, Laptop, Headset for FPS
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Availability:
Only 5 left in stock, order soon!
Arrives
Saturday, Sep 19
Features
- StepSense Footstep Radar Gain the Competitive Edge: The Fosi Audio C3 is a new model based on the K7 that incorporates StepSense. Hear footsteps sooner with StepSense technology, which enhances enemy movement while balancing gunfire and explosions. This gaming USB DAC amp helps you react faster and dominate every FPS match.
- 7.1 Surround Sound with Precise Positional Audio: Native 7.1 surround sound and HRTF processing create immersive 360 audio through any stereo headset. This USB sound card for PC helps you pinpoint footsteps, vehicles, and enemy locations with confidence.
- HiFi USB DAC Amp with Powerful Headphone Output: Featuring the flagship CS43131 DAC, supporting 32-bit/384kHz PCM and DSD256. Delivers 320mW 2 output to drive 16300 headphones with exceptional detail for gaming, music, and movies.
- Intelligent Noise Cancellation & Custom EQ: Reduce keyboard and background noise with Intelligent mic processing. Fine-tune your sound using browser-based controls with presets and custom EQ profiles for gaming, music, and streaming.
- Premium Aluminum Design for PC, PS5 & Switch: Compact CNC aluminum body with ergonomic controls and a single USB-C connection for a clean desktop setup. Switch between UAC 1.0 and 2.0 for seamless gaming and HiFi playback across PC, PS5, Switch, and Mac.
- UAC Mode Switching - UAC 1.0 (16bit/48kHz) enables plug-and-play console compatibility with PS5 and Switch, , while supporting gaming audio enhancement including FPS footstep detection and combat cue prioritization. UAC 2.0 (32bit/384kHz) unlocks full HiFi decoding for immersive cinematic experiences on PC and Mac.
Description
Guided by our mission of "Redefining HiFi with Unmatched Value", Fosi Audio continues to fuel its passion for the Hifi industry, ramp up R&D efforts, and co-create new HiFi equipment with users. We pledge to bring more amazing Hifi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, to audiophiles worldwide. Less guessing. Clearer positioning. Faster reactions. Detect & Boost Footsteps (3–9 dB) | 10 ms Ultra-Low Latency | No Change to Gunfire/Explosions Trained on extensive FPS audio data, StepSens is continuously refined for higher accuracy and better game compatibility. · Output Power: 317mW×2 @32Ω · Sampling Rate: PCM 384kHz / DSD 256 · Inputs: USB / OPT / COAX | Output: 3.5mm Headphone Jack Clear directional audio lets you hear footsteps, gunfire, and movement with precision. Immersive surround sound delivers precise positioning and realistic distance cues. Switch presets or tweak EQ via a browser interface — no software downloads needed. Up to 40 dB noise reduction — filters clicks & distractions. Clean voice with <50 ms processing. Switch presets or fine-tune via clean browser-based controls. No software required. Clean and minimal, takes up little desk space. Solid weight and premium feel, stays firmly in place during adjustments. Clear layout with tactile feedback for quick, no-look control. Angled for better visibility and more comfortable desktop operation.
Compatible Devices: Desktop, Gaming Console, Headphone, Microphone, Tablet
Brand: Fosi Audio
Hardware Interface: USB
Audio Output Mode: Stereo
Platform: Windows
Compatible Devices: Desktop, Gaming Console, Headphone, Microphone, Tablet
Hardware Connectivity: USB
Audio Output Mode: Stereo
Platform: Windows
Hardware Platform: Gaming Console, Headphone, Personal Computer
Surround Sound Channel Configuration: 7.1
Maximum Sample Rate: 384 KHz
Signal-to-Noise Ratio: 117 db
Item Dimensions L x W x H: 3.7"L x 3.69"W x 1.72"H
Brand: Fosi Audio
Model Number: C3-CA1
Number of Packs: 1
Number of Items: 1
Built-In Media: Fosi Audio C3, USB-A/C to USB-C Cable, User Manua, Y-Splitter Cable
Manufacturer: Fosi Audio
Mfr Part Number: C3-CA1
Warranty Description: 2 Year Manufacturer
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Sep 19
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
I ended up returning this and going a different direction, but while I owned it I loved it. The AI voice noise reduction feature worked amazingly. My voice came through super crisp and didn’t seem distorted. The sound was great as well. I almost always just use the stereo feature and none of the virtual surround sound, but those features all worked as they should. Very easy setup as well.
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Reviewed in the United States on July 20, 2026 by Waters542
Color: Black
Took a bit of experimentation but found the right IEMs to go with the dac. Now I can hear enemies steps effortlessly. Helped me won many games. Small form factor and powered by a single USB cable so it’s perfect for small desks. For $130, it packed a lot of goodies for gamers
Reviewed in the United States on July 7, 2026 by Xin
Color: Black
Amazing Dac/Amp for gaming, I highly recommended if you want better sound stage and footstep awareness. I pair them with Arete 2 IEM and kimura cable and mic for the IEM. I have had every gaming headset there is in the market (Including steel series nova elite and latest turtle beach stealth pro 2) and I am telling you that this combo is the best thing you're going to hear for any type of game. The Arete 2 IEM are already awesome but the Fosi Audio C3 takes it to another level.
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Reviewed in the United States on June 22, 2026 by Bryant G.
Color: Black
I like Fosi. they are innovative and the couple of products I have from them are solid. I love their multi output headphone amp, it lets me keep 5 of my favorite headphones ready for use and it sounds clean and is made of metal or at least feels like it. it is wonderful! this device however feels lighter than the smaller headphone amp. feels like less durable plastic. all that is fine if it does what it says it will do. which it does! kind of... I'm a counter strike player, and listening for small sounds like footsteps is crucial to winning games. this device promises to boost footstep frequencies in games like counterstrike 2, Valorant, Pubg, and delta force. I used this device to play counterstrike and the footsteps are very much boosted. what's also nice is you can adjust how much footstep boost you want to have. there is a small problem though. from the few games I've played, I can certainly say the footsteps were louder but their positional accuracy was worse. on my normal dac/amp combo, I can hear footsteps, approximately how far away they are, and roughly the exact position they are coming from. with the C3, on FPS mode, the footsteps were louder, but in many cases instead of me knowing how far away the person was, i just heard a very loud footstep coming from SOMEWHERE to the left. (or the right, I'm just using left in this example). so i'm sneaking around and to my left there is a LOUD FOOTSTEP! surely they must be right next to me getting ready to stab me right??? no. it was actually my teammate in an entirely different room stomping around. it sounded like it was 3 feet away from me, but in reality, to go find the source of the noise i would need to walk across the map for roughly 12-16 seconds before i got to where the noise came from. now this could be a software issue. i did update the firmware, but the issue did not seem top be fixed. its also not always the same. sometimes the distance is good, sometimes its not. in a game like counterstrike, your audio signals need to be dependable. so i actually turned off the loud footsteps and just used the 7.1 surround sound and even though the footsteps were quieter, i actually could hear much easier the approximate position of the footstep. I do think this may be something they can solve with updates, so I'm not knocking the device, because it has SO many other feature other than just StepSense. it needs updates, and maybe if i need to clutch a round, i'll swap pver to FPS mode just for the possibility of hearing louder footsteps even if their approximate distance is questionable. something else I noticed when trying stepsense in an offline workshop map just meant to shoot at bots that are walking around, there were quite a few times I would close my eyes, listen to where the footstep was coming from, and then open my eyes and turn to exactly where I heard the sound, and it would be wrong. a bot walked up to me from my back right, and I turn to the right, and they weren't there. they were completely behind me, 180 degrees from my starting position. it did not sound behind me, it sounded to the right. odd.
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Reviewed in the United States on July 22, 2026 by Jon
Color: Black
I use this with my planar headset with no problem powering my headset. With gaming on this device I could hear the footstep better.
Reviewed in the United States on July 19, 2026 by david nguyen
Color: Black
Absolutely incredible DAC , love Fosi as a whole. Easy recommendation and excellent all round.
Reviewed in the United States on July 1, 2026 by Calvin
**Engineering Evaluation Report** **Component:** Fosi Audio C3 Gaming External Sound Card for PC, USB DAC/AMP with 7.1 Surround & Footstep Enhancement, Audio Equalizer & Desktop Volume Control, Headphone Interface for PS5 Switch FPS **Application:** External USB DAC/AMP sound card optimized for gaming and multimedia use. The device delivers high-fidelity audio with virtual 7.1 surround sound, footstep enhancement for competitive FPS games, a customizable audio equalizer, and convenient desktop volume control. It supports PC, PS5, Nintendo Switch, and other platforms via USB connection, providing improved soundstage, clarity, and immersion for headphones and external speakers in gaming, music, and entertainment setups. **Objective** The objective of this evaluation was to assess audio fidelity and 7.1 surround performance, footstep enhancement effectiveness, equalizer and volume control usability, USB connectivity and compatibility with PC/PS5/Switch, build quality and heat management, and overall durability under extended gaming sessions. **Methodology** 2.1 Mechanical & Audio Inspection - Verified DAC/AMP specifications, virtual 7.1 surround processing, footstep enhancement algorithm, and equalizer bands. - Evaluated housing construction, knob/knob quality, USB interface, and headphone output impedance matching. - Inspected LED indicators and overall build finish. 2.2 Installation & Compatibility Testing - Connected the device to PC, PS5, and Nintendo Switch systems. - Tested driver installation (if required), plug-and-play functionality, and compatibility with popular gaming headsets. - Evaluated desktop volume control response and software integration. 2.3 Performance Testing - Conducted listening tests in FPS games for footstep clarity, spatial awareness, and 7.1 surround imaging. - Measured audio output quality, equalizer customization impact, and latency. - Evaluated performance with music and multimedia content for overall fidelity. 2.4 Durability Assessment - Performed extended continuous operation and repeated connection cycles. - Tested under typical gaming desk conditions including vibration and temperature variation. - Inspected for connector wear, audio degradation, and housing integrity. **Results** **3.1 Audio & Processing Performance** - Clear, detailed sound with effective virtual 7.1 surround and enhanced footstep detection in FPS titles. - Customizable equalizer provided meaningful adjustments across frequency bands. - Strong headphone amplification with good power output and low noise floor. **3.2 Installation & Usability** - True plug-and-play compatibility across PC, PS5, and Switch with minimal setup. - Responsive desktop volume control and intuitive interface for quick adjustments. - Compact design fit easily on gaming desks without occupying excessive space. **3.3 Performance** - Noticeable improvement in positional audio and immersion compared to onboard sound. - Low latency suitable for competitive gaming. - Balanced output worked well with a wide range of gaming headsets and speakers. **3.4 Durability** - Solid construction withstood extended use and minor desk impacts. - USB connection and controls remained reliable after repeated cycles. - Projected service life of 3–5+ years with normal gaming use. **Discussion** The Fosi Audio C3 Gaming External Sound Card is a capable and affordable upgrade for gamers seeking better audio performance without investing in high-end internal sound cards. The combination of virtual 7.1 surround, footstep enhancement, and a flexible equalizer significantly improves situational awareness in competitive FPS games while enhancing overall listening enjoyment. Its compact size and easy USB connectivity make it highly practical for multi-platform use (PC, PS5, Switch). The desktop volume control adds convenient real-time adjustments during gameplay. This device strikes a good balance between features, performance, and value for both casual and competitive gamers. **Potential Considerations** - Virtual surround performance depends on headphone quality and game audio implementation. - For advanced customization, pair with companion software if available. - Position the unit away from strong magnetic fields or excessive heat sources. - Ensure USB port provides stable power for optimal amplifier performance. **Conclusion** The Fosi Audio C3 Gaming External Sound Card for PC, USB DAC/AMP with 7.1 Surround & Footstep Enhancement, Audio Equalizer & Desktop Volume Control, Headphone Interface for PS5 Switch FPS provides clear audio performance, effective gaming features, easy multi-platform compatibility, and solid build quality. It meets electrical, audio, usability, and durability requirements, making it a reliable external sound solution. The footstep enhancement and customizable equalizer deliver tangible benefits for immersive and competitive gaming. A well-designed, compact, and value-oriented audio upgrade. Highly recommended.
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Reviewed in the United States on June 24, 2026 by Vern S.
Color: Black
Fine
Reviewed in the United States on July 22, 2026 by Pamela Compres