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

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: $89.99.Current price is: $79.99.

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Price: ~~$89.99~~ - $79.99

(as of Feb 18, 2026 04:55:37 UTC –

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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; Dimensions: 4.4×3.7×1.2 in(112x95x30mm).

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. To mute speakers while using headphones, either turning the speaker’s own volume to zero, or unplug the RCA cable. 2.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”. 3. 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.

Headphone + Speaker Play Together (no switch) : This is the normal architecture of K5-Pro: both outputs remain live. To mute speakers while using headphones, either turning the speaker’s own volume to zero, or unplug the RCA cable.

PS: The product offers RCA line-out and 3.5 mm headphone-out only; there are no XLR sockets.

Comparison

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Customer Reviews

4.1 out of 5 stars 1,448

4.4 out of 5 stars 3,203

4.4 out of 5 stars 426

4.4 out of 5 stars 310

4.5 out of 5 stars 652

4.7 out of 5 stars 120

4.4 out of 5 stars 466

Price

$79.99$79.99

$69.99$69.99

$79.99$79.99

$99.99$99.99

$29.99$29.99

$49.99$49.99

$79.99$79.99

Type

DAC+Headphone Amp

Headphone Amplifier/Preamp

DAC+Headphone Amplifier/Preamp

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

Bluetooth + RCA

Output

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%

≤ 0.02%

SNR

>110dB

≥105dB

≥108dB

≥120dB

–

≥105dB

≥103dB

Terminating Impedance

16-300 Ohm

16-200 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

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

Additional information

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Product Dimensions	4.4 x 3.7 x 1.2 inches
Item Weight	15 ounces
ASIN	B0BFHFSX4C
Item model number	K5 PRO
Date First Available	September 16, 2022
Department	Gamers
Manufacturer	Fosi Audio
Language	Altaic Languages

Reviews

10 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

DC

February 18, 2026

The packaging comes with optical, USB-C/A cable, 3.5mm jack splitter for mic and headphone. The DAC is well built just like other Fosi products, solid gunmetal aluminium enclosure.Front: All the aluminium knobs feel high quality. The tone controls have a midpoint tactile stop. The volume control uses a Taper-A pot, which also serves as a power and input switch.Back: The USB-C port was slightly offset and the connector was a bit difficult to insert. Consider enlarging the hole for the USB-C port on the backplate a bit so that the connector doesn't rub against iHow does it sound?First, I compared the K5 Pro to the onboard audio on my Asus B550A motherboard (SupremeFX S1220A), which is already pretty decent. However, when I played games, the motherboard produced a ton of coil whine noise that originated from my GPU. The DAC completely eliminated the coil whine noise when I used both the optical and USB modes.As far as sound quality, I couldn't hear any difference between the S1220 and the K5 Pro when I used a QC25 headphone. I also tried switching between the optical and USB modes to see if I could hear any difference, but there was none. Some people don't like the tone controls because they affect the sound quality, but I found them very useful for adjusting the sound to my taste. I often tweak them depending on the content I'm listening to.The playback bitrate of 96kHz works with USB, and 192kHz works with the optical. I didn't test the Coax input because I don't have one. The maximum microphone recording bitrate is 1 channel, 24bit, at 48kHz.Room for improvement:I suggest keeping the naming short and just including the model and brand name, like the TB10D. No need to print the entire 'MINI STEREO GAMING DAC' on the front.It would be useful if the device could remember the last input mode when there is a power loss, as well as the last power mode. For example, if the device lost USB power while it was on, it should turn on again when the USB power is restored.Consider enlarging the hole for the USB-C port on the backplate so that the connector doesn't rub against it.

Miguel A. Herrador

February 18, 2026

Barato , cómodo y útil. Aparato bien construido y con sonido muy aceptable.

Eze am

February 18, 2026

Excelente. lo conecté al puerto USB C, también trae adaptador para USB A-B, sin problemas. De inmediato se encendió. conecté el rca a mi amplificador. y ualá: Agudos finos, pensé que mis bocinas no daban eso, y sí , el DAC funciona! Se oye el fondo de cada instrumento, los instrumentos en sí usan un amplificador Monoaural, y se mezclan. Este DAC te deja notar ese detalle. Lo he probado con buenas mezclas, se nota la diferencia desde el primer momento. Es calidad de sonido. Para los que apreciamos la sutileza del sonido. apenas me llegó ayer, y es genial. aún falta probar lo en otros aspectos, pero por ahora, se nota en calidad de sonido. los aqudos son puros, transparentes. Se nota el DAc, de inmediato. lo uso con un amplificador fosi BT 10:

あざらし

February 18, 2026

🎧 Fosi Audio K5 PRO DAC／ヘッドホンアンプレビューオーディオ機器を揃え始めた中で、DACやヘッドホンアンプという存在を知り、興味を持って初めて購入した一台です。価格が手頃で手に取りやすかったのが購入の決め手でした。【デザイン・外観】シルバー基調のデザインで、デスク上に置くとしっかり映えます。ノブ部分も金属感と光沢があり、価格以上に所有欲を満たしてくれる質感です。Mac製品とも相性が良く、デスク環境に自然に馴染む点も好印象でした。【使い勝手・接続】操作はとてもシンプルで、初心者にも分かりやすい構成です。Type-C接続に対応しているため扱いやすく、iPadやPCに接続して使用していますが、特に迷うことなく使えています。【音質・調整機能】低音域・中高音域を個別に調整できるため、自分好みの音に仕上げやすいです。ノブを回すだけで直感的に調整でき、ちょうど良いポイントで止めやすいのも便利でした。出力はしっかりありますが、イヤホン接続＋大音量設定ではホワイトノイズが出ることがありました。そのため、イヤホンよりもヘッドホンとの組み合わせの方が向いていると感じます。【まとめ】この価格帯でここまで満足できるのは素直にすごいと思います。✔︎ 初めてDAC／ヘッドホンアンプを導入する方✔︎ デスク周りを手軽に音質アップしたい方✔︎ 操作が簡単な機器を求めている方には特におすすめです。迷ったらまずこれを選んでみて良い一台だと思います。

Mike_Erickson

February 18, 2026

situation : malentendant, j'ai un casque filaire MEZE 105 Silva, avec un cordon DAC qui me permet, en le branchant sur le téléphone d'avoir une écoute améliorée en liaison avec le logiciel "amplification" d'Android.Mais pour la TV, c'est plutôt plus compliqué. TV SAMSUNG 65 TQ65S95D avec platine extérieure et ses connexions.J'ai commencé avec un SENNHEISER RS195, bon casque, connexion optique, mais le volume son est limité.Il me fallait donc une solution pour brancher la sortie optique de la TV sur un ampli DAC avec réglages séparés (aigus, basses, volume) sur lequel, je brancherai mon filaire.J'ai donc soumis chatgpt 5.2 à la question et après un prompt indiquant qu'il était important que je puisse entendre les voix correctement (problème de phonèmes), il m'a proposé 3 articles possibles, en me donnant un avis : sur l'utilisation réelle, la puissance, le rapport/qualité prix et ce modèle est sorti en 1er de son classement.J'ai donc essayé et le résultat est parfait. Je peux ainsi choisir en même temps l'utilisation du casque en vue :- d'obtenir le son du HP TV si une personne regarde une émission avec moi- idem pour le son de la barre de son SENNHEISER notamment pour le Dolby ATMOS (le Fosi ne prend en charge que le PCM sinon, ça ne fonctionne pas)ou le casque seul en optique.Ainsi, je maîtrise les réglages.Le FOSI est petit, il a des connexions en câble optique, en RCA et en coaxial.L'alimentation se fait par USB C 5V (ce qui correspond à la norme standard)Une seule réserve : les boutons de réglage me paraissent "fragiles". A voir dans le temps.Attention, on trouve ce matériel un peu à tous les prix ça va de 65 € environ à 145 euros, mais j'ai préféré choisir le fabricant plutôt qu'un illustre inconnu en terme de fournisseur.Rapport qualité/prix : bonNote globale : 9/10 - je recommande selon usage et déplacements

Amazon Customer

February 18, 2026

Stopped working in about 21 months, just outside the warranty window The unit randomly stopped outputting audio & flashing this blue light on the pcb. I tried switching to several different cables and USBs on my computer but nothing seemed to fix this. I wish there were any mention of what this light is for on this page or in the manual so I could properly diagnose the issue but I just have to assume something is defective with the unit. The warranty is 18 months and I am just 3 months over that time so my only choice seems to be buying another unit and hoping this doesn't happen again since I can't find any competitors that offer an AMP/DAC that takes both audio and microphone inputs.

Sam F.

February 18, 2026

An overall great small amp to drive quality audio to most headphones with some QoL EQ knobs. This little amp is the perfect addition to a nice pair of hifi headphones. I thought the 3 small metal knobs would be pretty gimmicky but I turned out to change my mind in practice. Sometimes I will be playing a game where theres just too much bass in the mix and I'm having trouble hearing footsteps, so I just turn the knob down halfway and voila, perfect mix again. Same for movies and tv shows but in reverse. I have a pair of Philips shp9500 and so if I am watching a tv show, I usually just crank up the bass just a little bit to give it that 'oomph' feeling.The amp overall can push up to 300 ohms and it gets way too loud for me, it would damage my ears if I turned it all the way up. The build feels great, its smaller than I thought and I actually like that. Its this little chunk of metal that just outputs great audio.

Luke

February 18, 2026

Very good for the price I bought this expecting “good enough.” What I got was a little metal brick that basically killed my urge to upgrade.Setup is instant — plug in, Windows recognizes it, no driver drama. Build feels solid, real volume knob, separate bass and treble that actually work (not gimmicky).Sound:Bass is tight and controlled, not bloated. Korean R&B and EDM hit hard without turning into mud. Mids are clean, vocals feel present, and the treble is crisp without stabbing your ears.Gaming:Footsteps are super easy to place. Imaging is way better than it has any right to be at this price.Power:Drives everything I own with headroom, zero hiss.If you just want clean power, good bass, and no headaches — the K5 Pro is great value

N Gar

February 18, 2026

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

jtechman

February 18, 2026

One of the BEST DAC/amp to have I was looking for a good quality DAC/amp to game with. Something not complicated by software. Came across this and I am very satisfied with the sound and quality build. I use it with the Dolby Atmos audio and Razer's THX Spatial audio app...and wow...I get the immersion that I was looking for. I owned this for a couple of months and has had no issues, no static nor dropped audio ( others may be having issues due to computer overclocking, as OC also strains all components on the mobo.) I have been using this with my EPOS H6 Pros ( open and closed back) and can say this DAC/amp really brings my headsets to life. Music is also detailed and well separated with plenty of volume. This can handle headphones/headsets up to 300 ohms, anything over and it will struggle, but I knew this when I bought it. I primarily use it for gaming and I am very satisfied.Get it for what it is, a basic stereo audio DAC/amp. If you get it and try to make it work for what it is not, don't complain about it and try to make it out as a bad product. Turning it on is straight forward, hold the volume knob in for a few seconds and off you go. If you are going to connect this to a USB hub, make sure that it is powered, it does use a bit more power .I recommended this to friends and family and have yet to hear any complaints.

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