Fosi Audio K5 Pro Gaming DAC Headphone Amplifier Mini Hi-Fi Stereo Digital-to-Analog Audio Converter USB Type C/Optical/Coaxial to RCA/3.5MM AUX for PS5/PC/MAC/Computer
Original price was: €90.€80Current price is: €80.
Price: $89.99 - $79.99
(as of Aug 02, 2025 11:07:09 UTC – Details)
Product Description
USB DAC Born for Gaming Fosi Audio K5 Pro Stereo Gaming DAC Headphone Amplifier
The K5 Pro has a high-performance audio circuit designed by the Fosi Audio innovation product R&D team, allowing you to take advantage of digital audio with USB C/optical/coaxial inputs, convenient for connecting various digital interfactes, compatible with PS5/Computers, etc.
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Desktop Headphone Amp Merchant Video
the upgraded version of Fosi Audio Q4
Fosi Audio USB DAC Headphone Amp Combo
Input: USB-C/OPT/COA/3.5MM Microphone; Output: RCA/3.5mm HeadphoneOPT/COA Sampling Rate: up to 24bit/192 kHz;Output power: 1000mw@16Ω, 500mw@32Ω, 300mw@64Ω, 150mw@128Ω, 80mw@300Ω;THD: <0.003%; S/N: >110db; Frequency response: 20Hz-20kHzRecommended headphone impedance: 16-300Ω
practical and usefull
NEW DAC Headphone Amp
RCA output can be connected to an amplifier or powered speakers on your desktop.
outstanding performance
Exclusive Design with Independent Mic Input
Microphone interface can drive 16 Ohm to 300 Ohm headphones.
richer audio details
Great Sound Quality
Next-generation DAC for unrivaled performance to make your music sound great
rich and delicate sound
Gaming Starts Here
Converts USB Type C/Optical/Coaxial signals to 3.5MM AUX and RCA signals with low distortion
1 Mini Compact Desktop DAC
2 3.5 MM MIC Inputs
3 RCA Output
4 DAC Audio Converter
elegant grey exterior
Desktop DAC and Headphone Amplifier
The knobs are high quality and turn very smoothly, they’re quite enjoyable to use.
works with PS5 USB audio
Mini Stereo Gaming DAC
Great Value Headphone AMP/DAC with Bass/Treble Control
easy to install
Plug-n-play, No Driver Needed
If you have RCA speakers and want to connect them to a computer, get this device!
RCA ouput
Great sound quality
Next-generation DAC for unrivalled performance, make your music sound great at home on your desk.
1 with Bass Treble Control
2 Perfect for Gaming System
3 Desktop DAC Preamp
4 Richer Audio Details
Is the K5 Pro driverless on Windows 7?
Yes, it is driverless.
What’s the sample rate of USB/Optical/Coaxial?
USB supports up to 24-bit 96 KHz, while Optical and Coaxial support up to 24-bit 192 KHz.
My K5 Pro won’t turn on with my iPhone 14.
Ensure you are using a USB-C to Lightning OTG cable. For devices that may not output enough power, try using an additional USB splitter cable for power supply.
Unable to Power On.
To power on the device, press and hold the volume button for a longer time.
How to use K5 PRO with PS5?
Plug headset into K5 Pro via 3.5mm splitter. Go to PS5 Settings > Sound > Audio Output, select Output Device > Fosi Audio K5PRO. Adjust mic level to optimal range. Ensure PS5 output/input set to Fosi Audio K5PRO.
Friendly Solutions Guide for Fosi Audio K5 Pro
Function Issue Solutions: 1.Single Side Audio/Unresponsive Port: Replace earphones with a known – good pair. Check if the plug matches the jack and is fully inserted. Verify the audio output settings on your device to ensure it’s set to “K5 Pro”. 2. No Sound/Device Not Working: In USB mode, ensure the output device in Windows Control Panel is “Fosi Audio K5 PRO”. For OPT/COA connections, confirm correct port connections and set the K5 Pro to the corresponding mode. Also, configure the TV’s audio output to PCM mode and disable other audio effects. Check for damaged cables and ensure the device is powered on by long – pressing the volume button for over 2 seconds.
Audio Sound Issue Solutions
– Noise Issue: Check the audio source and lower the volume to see if noise disappears. Use well – shielded USB OTG cables and keep them away from AC power cables. Replace poor or damaged audio cables with high – quality ones and test with different outputs. Switch input modes to see if noise decreases. For headphone noise, try using a 3.5mm ground loop isolator and high – impedance headphones.
– Electric Current Issue: Replace cables with well – shielded ones and ensure they are away from AC power cables. Correct all connections to avoid interference from other devices.
– Unsatisfactory Sound Quality: Use high – quality, lossless music formats and play them on dedicated devices. Reset the equalizer to the neutral position and gradually adjust bass/treble.
Compatibility Limitations Solutions
– Not Compatible with IEMs: The K5 Pro can drive IEMs but is recommended for headphones with an impedance of 16 – 300 ohms.
– Not Compatible with Linux: Linux has strong flexibility and diversity, and driver support for certain devices may be incomplete. It’s recommended to use the K5 Pro on the Windows system.
– Not Compatible with GOXLR: The K5 Pro cannot be connected to GOXLR.
– Cannot Connect to Receiver: The receiver needs to support RCA input if you want to connect the K5 Pro to it to drive passive speakers.
Comparison
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Customer Reviews
4.2 out of 5 stars 1,090
4.4 out of 5 stars 3,048
4.5 out of 5 stars 324
4.4 out of 5 stars 204
4.5 out of 5 stars 580
4.7 out of 5 stars 72
4.3 out of 5 stars 365
Price
$79.99$79.99
$62.99$62.99
$75.99$75.99
—
$27.33$27.33
$49.99$49.99
$79.99$79.99
Type
DAC+Headphone Amp
DAC+Headphone Amp
Headphone Amplifier/Preamp
DAC+Headphone Amplifier/Preamp
Headphone Amp
Headphone Amp
Headphone Amp +Preamp
MAX Power Output
–
–
2400mW@32Ω(High Gain)
3.5mm: 280mW,4.4mm: 1100mW@32Ω
40mW@100 Ohm
310mW@32Ω
–
Input
USB-C+OPT+COA+3.5mm Microphone
PC-USB+OPT+COA
3.5mm line in
USB + Optical
3.5mm AUX
3.5mm AUX
Bluetooth + RCA
Output
RCA + 3.5mm Headphone
RCA + 3.5mm Headphone
line out, 3.5/6.35mm headphone
3.5/4.4mm Headphone, AUX/OPT
3.5mm Headphone ×4
3.5mm Headphone ×5
RCA + 3.5mm Headphone + AUX
Treble & Bass Control
✔
✔
✔
✘
✘
✘
✔
THD
<0.003%
≤0.01%
<0.001%
<0.001%
–
<0.001%
≤ 0.02%
SNR
>110dB
≥105dB
≥108dB
≥120dB
–
≥105dB
≥103dB
Terminating Impedance
16-300 Ohm
16-200 Ohm
16-300 Ohm
16-300 Ohm
15-150 Ohm
16-300 Ohm
–
Power Adapter
–
–
–
–
12V/1A
–
12V/1.5A
Work Voltage
USB-C/DC5V
DC 5V
USB-C/DC5V
USB-C/DC5V
DC 12V
DC12V/1A
AC 110V – 240V
The upgraded version of Fosi Audio Q4 adds microphone function, K5 Pro headphone DAC amp combo, next-generation audio converter with unrivaled internals, more outstanding performance, and richer audio details. Born for Gaming. K5 Pro stereo DAC headphone amplifier is perfect for your home gaming system, equivalent to an external sound card, suitable for PS5/Computers/PC/MAC/active speakers, etc
K5 Pro USB DAC converts USB Type C/Optical/Coaxial signals to 3.5MM AUX and RCA signals with low distortion and great dynamic range. Unique design: 2-in-1 USB Type C interface charging port and audio input means K5 Pro is compatible with your phones(Note: Your audio source must be connected to the USB-A/C port.). RCA output can be connected to an amplifier or powered speakers on your desktop. 3.5 MM AUX and microphone interface can drive 16 Ohm to 300 Ohm headphones
K5 Pro headphone DAC adopts the Texas Instruments NE5532 op-amp chip. The circuit design implementing this DAC has been optimized for a low-noise floor and clean sound. K5 Pro has noticeably improved on overall sound quality, so you can get immersed in your music even more easily. Volume button and on button are combined into one, long press to switch on
Product Specifications: K5 Pro with master volume/bass/treble control and input mode switch. USB Type C rate: up to 24 bit/96 kHz, Optical/Coaxial sampling rate: up to 24 bit/192 kHz, THD ≤0.003%, SNR ≥110dB. Output power: 1000mw@16Ω, 500mw@32Ω, 300mw@64Ω, 150mw@128Ω, 80mw@300Ω
What You Get: K5 Pro DAC amp x1, 3.5MM headphone splitter x1, 2-in-1 USB Type A/C to Type C cable x1, User Manual x1, Optical Cable x1
9 reviews for Fosi Audio K5 Pro Gaming DAC Headphone Amplifier Mini Hi-Fi Stereo Digital-to-Analog Audio Converter USB Type C/Optical/Coaxial to RCA/3.5MM AUX for PS5/PC/MAC/Computer
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Related Products
Original price was: €90.€80Current price is: €80.
SGLIDE –
Mighty little (travel) DAC!
This little DAC is a gem for the money.instead of making this review a long story, I am providing (subjective) pro’s and cons.Tested as driving a Fosi TB10D as well as a wired headset.Inputs: nothing else to wish for! usd-c, Coaxial and Optical. do not forget the mic 3.5mm input for the gamers (and perhaps people working on their Mac/PC and on online meetings.outputs: 3.5mm headphone, RCA and usb-c.build: metal, nice and sturdy. small footprint! Bass/Treble buttons have a neutral “clikc” position which I do appreciate! multi functional volume know (on/off, volume and input selector) keeps the looks simple.audio quality: I used a laptop via usb-c and a DVD player via Optical. the sound signature is pretty much neutral to me. the bass and treble controls will give you the ability to dial in the sound to your liking if you use a headset or an amp that does not have bass and treble control.Pro’s:small footprint (perfect for travel), good build quality, all inputs neededgood sound quality, no audible noise. powerful enough to drive most headsets out there”Cons”:for aesthetic reasons I would like to see the color of the unit (and size) to be identical to other products made by Fosi (ex: TB10D; the one I use in my desktop setup with E… BT6.2 speakers). Again, this is a personal opinion and I know it contradicts my Pro regarding the size.Overall, for the money this is a great unit, especially taking the price in consideration!Fosi did it again!
N Gar –
An excellent budget external DAC, but you need to know what you’re getting
I have an Edifier T5 subwoofer connected to a pair of R1280Ts. When connected directly to the computer’s 3.5mm output, the subwoofer was uncontrollable – it shook the house no matter what I did to the volume, EQs, whatever. I had to basically turn it off.Now, I run a USB cable from the PC to the K5, and RCA cables from the K5 to the subwoofer, and more RCA cables from the subwoofer to the speakers. After setting the low-pass filter on the subwoofer to just over where the speakers drop off, the sound is crystal clear with bright highs and thrumming lows (without dominating the whole sound). The fact that I can instantly control the bass and treble on the K5 is a huge plus.I am thrilled with the K5, and it was a very cheap solution to get the most out of my not-so-cheap speakers.edit: Okay so its not PERFECT. This is going to take some explanation. If you’re planning on using powered speakers on a PC, this applies to you.Everything was fine until my GPU (RTX 2080) came into play (firing up a game). The computer began sending a ton of interference down the USB connection to the F5. More expensive units I’m told can filter this out, but the K5 can’t. Now this isn’t necessarily the K5’s fault. Computers are electrically noisy, and if I replaced my PSU, motherboard, GPU, or all three, that might solve the issue. Since that would be insane, I instead opted to power the K5 through a source other than the PC (outlet will do fine) and use the optical input (toslink) for data. Since toslink uses light to transmit the data, it is immune to EMI interference. Perfect sound. The only downside is my audio is running through my Realtek onboard audio again now; which I’m not thrilled with, but really isn’t a problem.If you’re using headphones, this probably won’t be an issue. And again, this really isn’t a knock on the K5, they do say they’re for headphones and not powered speakers (probably because they don’t have the electronics to filter out the type of noise I’m describing), but if you’re planning on using this device for speakers, just a heads up on the USB audio combined with a powerful GPU.On a final note, I did hack a USB cable, cut the power/gnd from the PC and connect that to another USB cable going to a separate power source. It did eliminate the GPU-related noise, but the PC was still noisy enough to introduce interference somehow (ground loop possibly? Doubtful since all power came from a single UPS). They do sell USB galvanic isolators, that might do the trick, but they’re as or more expensive than the K5 itself. Optical connection will do fine.Edit2: turns out it was my speaker’s issue with the aux input. I bought a separate speaker for my work computer and now I just do a direct USB connection to my computer and all interference is gone. I’d still prefer a separate power input from the USB data input in case you ran into interference from the motherboard, but I have 5o say it’s perfect now
pH –
Nice DAC/Amp – with bass and treble controls
Any of these are going to greatly improve the sound over plugging your headphones directly into the mini-jack on a computer.Listening was done with a few different headphones but mostly with beyerdynamic DT 700 PRO X Closed-Back Studio Headphones. Music source was a laptop connected to the DAC/Headphone Amp via USB. If an external power supply was included, I used that. If not, power came via USB.I’ve kept notes on my impressions brief and included comparisons amongst the DAC/Amp’s in this list. They are listed below in my order of preference with my favorites at the top. If you want flowery vocabulary I’m sure in depth reviews are available out there on the web.Headphones make the greatest difference in sound – spend more on them, if necessary. The DAC/Amp is secondary but does add its own flavor to the music.—iFi Zen DAC V2 | Desktop Digital Analog Converter(Listening only with “TRUEBASS” off.)Very good.Slightly better than the FiiO K7. Better vocal clarity and slightly fuller bass.I ended up comparing this with the FX-Audio DAC-X6 head to head, which continued to surprise me as I put it up against significantly more expensive competitors. Across several hours and many pieces of music, I prefer the iFi… but the difference is infinitesimal. Possibly the iFi has a little more punch to the bass? Maybe a bit more space ans separation? If you’re working to a budget, get the FX-Audio and put the extra cash towards better headphones.FX-Audio DAC-X6 Mini HiFi 2.0 Digital Audio Decoder DACThis thing is good. Surprisingly good. I ended up putting it head-to-head with amps costing three times its price.Slightly warmer sound, with slightly less detail in the vocals than the iFi Zen Air, but more space in the music, and more enjoyable to listen to. Slightly better clarity than the Topping.FiiO K7 Full Balanced HiFi DAC Headphone AmplifierThis is indeed better than the K5 version. Vocals are more lifelike. And a particular emphasis on the mid-treble heard in the K5 is absent. There is more separation between the instruments.Very close call with the iFi V2, with my preference going to the iFi for better vocal clarity and slightly fuller bass.iFi Zen Air DACNot quite as good as the V2, but close. Closer than the FiiO K5 is to the K7. There is, again, a comparative emphasis in mid-treble and the vocals get a bit lost. The sound is slightly thin compared to rivals at this price point.FiiO K5 Pro Headphone Amps Portable Desktop DAC and AmplifierNot quite as good as the K7, but at half the price one cannot really complain. Vocals are not quite as lifelike and there is more mid-treble – but not in a good way.Topping DX1 Mini Stereo DAC Headphone Amplifier ComboVery good little unit. Bass is slightly overemphasized.Fosi Audio K5 Pro Gaming DAC Headphone AmplifierI thought this unit was DOA. Turns out that you must long press the volume knob to turn it on. (Short press to select input.)Not terrible, but not as musical as the others in this test. Also, the only one with bass and treble knobs. And only a mini-jack – no 1/4″ jack.Pro-Ject Head Box S2 DigitalThis DAC/Amp had an issue that makes it unlistenable. The sound is very nice… but… there’s some faint static. Only in the music, not in silence. A faint crackling…. Can’t have that.
Jimmy Baynard –
Long lasting and budget friendly
Great value for the money. Bought it to go with my Beyerdynamics DT 990s for my gaming PC. Easy to set up. Plug n Play. sounds great. Been using it for years now with no issues.
Olivier –
Livraison rapide. Facile à installer. Fonctionne bien. A voir à l’usage. Paraît solide. Peu encombrant. Câble usbc fourni avec et cable toslink aussi +adaptateur casque micro.
Attila Balázs –
It drives a bayerdynamic 990pro headset. This is what amazon recommended for the headphones.These headphones are 250 ohms, so they need more power, but they don’t meet my expectations. The volume is just right, but the bass, treble and volume are all set to maximum. And even so, it would be nice if he had more power!Tested with a JBL headphone with fewer ohms, it drives normally.It was a good buy for me until I had a bigger amplifier. In the end, I am satisfied with the product.
Cliente Amazon –
No sabÃa que me hacÃa tanta falta uno de estos. HabÃa visto reseñas y la mayorÃa de gente que entiende de audio recomienda usar un DAC, pero menudo cambio, estoy encantado.
Kyle Marriott –
Purchased this audio DAC because i was excited to see that FOSI AUDIO had just come out with a DAC that included headphone microphone input. I was an early adopter of this product and actually paid a premium price through amazon USA, shipped to Canada. I knew the similar FOSI Q4 had an excellent reputation for sound quality but unfortunately did not suit me because of the lack of microphone input.In come the FOSI AUDIO K5 MINI PRO.. I had to give this DAC a try. As soon as you handle this product you know you are getting a quality piece of equipment. Setup is easy, all you do is plug it into your computers USB port. No driver install, just tell your computer to play the audio from the device in your sound setup. Even comes with a dongle to allow for a combined audio/mic headphone set to plug into the separate jacks on the device.Audio quality – 10/10 excellent and an absolute steal for the asking price that I am now seeing on amazon as of DEC 29/2022Microphone quality – 10/10 If you online game your friends are going to think you have a very fancy microphone with this DACs ability to amplify the microphone input. It can be almost too clear and loud on some headsets but this can be adjusted in the windows input microphone level settings and turned down.I did need to get support from FOSI and they immediately and quickly helped me with my advanced technical question and had my device working well with all my equipment. (I use quite a few different headphones w/mics and had an issue with one of them which FOSI solved)This K5 MINI PRO is on par with some of the very expensive DACS out there.There is only two features I wish that FOSI would add. Some sort of “go to sleep mode” and “auto wakeup on sensing sound” to have this unit automatically turn off after say 30min of inactivity and wake itself when needed. The other would be a volume adjuster for the microphone input. These are just wishes to make an already excellent product even better.You will not be disappointed with this product.
Max –
Sehr gute Optimierung. Nutze dazu die Razer Barracuda X, ohne irgendwelche Probleme. Ton ist einfach klasse.