Fosi Audio K5 Pro DAC Amp Headphone Amplifier, Mini Hifi Stereo Digital-to-Analog Converter, USB Type-C/Coaxial/Optical to 3.5MM AUX/RCA Jack, for Gaming PS5/ PC/Active Speakers Up to 24 bit/192 kHz

This little amp is a quality product, it arrives well packaged in a smart box with simple instructions and a selection of leads. The leads themselves felt a little bit on the cheap side but perfectly good for the task, I suspect most audiophiles would buy their own leads anyway. The amp itself feels very solid, with an all metal case (no cheap plastic here) that has a nice satin finish, it isn't going to win any style awards with its functional looks, but still manages to convey a pleasing aesthetic that isn't going to look out of place in any setup. The amp was very easy to install and setup, literally plug and play on my PC with no fussy drivers to worry about. It all worked straight out of the box, and it worked very well indeed! The sound is great, with no noise and very clear highs and lows. My onboard sound is pretty decent on my MSI X470 Pro, but I would compare it to the difference between listening to an MP3 and then a FLAC of the same song. Like night and day! Overall this feels like a quality product that punches above its weight in all regards, I was so impressed I immediately bought another one for a family member who appreciates good audio. I don't think you can go wrong at this price point.

As a daily driver of the Fosi Q4 DAC (in combination with the BT30D amp) for my computer, and a BT20D for the bedroom it's safe to say I like Fosi gear. The K5 Pro is a fantastic upgrade and replacement for the Q4 in several aspects. 1. Build quality and design: the new design of Fosi products has made the old black boxes look more sleek and modern. The gunmetal grey is stylish and works with any mini hifi setup or room. It just so happens to match the metal in my headphones and stand. 2. Connectivity: the Q4 used a 5v micro usb for power, then a full-size usb type B to connect to a pc (the optical and coaxial are the same on both models). With the K5, one usb c is used for both power and signal. What impressed me is the lack of interference when using the same cable for both. Initially I was skeptical of this (without cutting the cable to see) but I can assume that there is a good degree of shielding of the individual cores to prevent any interference or cross talk. In addition the K5 Pro has added a 3.5mm microphone input next to the 3.5mm headphone output. This output can power headphones from 16 ohm to 300 ohm. This is a 100ohm improvement over the Q4 and as I have a pair of HD660s it makes a lot of difference. Just like the Q4 there is a RCA output to connect to speakers or a seperate amp unit. 3. The DAC chip: the K5 Pro uses the new Texas Instruments NE5532 op-amp chip. Especially noticeable through headphones there is precise and punchy bass control and incredibly clear highs while never muddling the mids. 4. Gaming: both the K5 and Q4 are advertised as gaming DACs. The K5 really improves over the Q4 because of the NE5532 chip. Using Dolby Atmos for headphones the positioning and soundstage was perfect for FPS gaming and immersion. I have only one gripe about the K5 Pro. It's the power button. To turn on and off you have to long press the volume knob. This means every time the K5 loses power you have to turn it back on manually. The Q4 had a point on the volume where as you turn the volume up the DAC turns on. Once left at a volume the Q4 just turns on and off without having to touch it. It is all down to my laziness but the quick press of the volume to change the input is a very nice to have. In summary the K5 is a clear upgrade over my Q4. Comparing my review to others they are saying similar things. If you just want something that sounds great and incredibly portable to power your headphones or to connect to your active speakers the K5 is a no brainer for the price. If you want the best of both worlds by using a pair of headphones and passive speakers like me the price is a steal and leaves plenty of budget for an amp.

I've been using this since I bought a pair of Hifiman he400 headphones and finding that my PC motherboard was impotent for driving decent headphones. For the price it is down the cheaper end of DAC amps but it's served me well. I've purely used optical input as I used to experience electrical background noise via other connections but it's been more than up to the job. The Sundara headphones I most recently purchased have found the limit of its ability but it is even still able to drive them to a very acceptable standard, I'm upgrading to see if they react better to a stronger source (as well as balanced output which I don't believe this unit can do). To be honest I would have been fine with the volume and quality as things stand, it's already able to hit levels that are not ideal for the ears and create bass as smooth and low as you could want at this price point. The point that goes against it hitting 5/5 is the volume knob which hits max at about 90% of it's rotation. More of a 4.5/5 but not worthy of full marks. Other than the sound side of things it's very well made, the knobs are a little cheap in feel and hard to see unless lit up with just one small detent on each so you can feel them stop at the 12 o'clock position isn't ideal but gives some feedback to go in blind with. I highly recommend this based on how it's performed for me, being able to run planar magnets is quite a plus point and the fact it's been turned on near enough 24/7 since April '23 has to be worthy of some credit.

I used to have Turtle Beach headphones when they came with the inline amps.. Sounds was always great, bass was powerful too. Since then, headphones I've had just didn't feel like they were powerful enough. After some (slightly confusing) searching for an "amp" this one looked to be perfect for what I needed. 3.5mm connector with USB C to USB A adapter which came with it. Plugged it into my pc, works brilliantly just like that. No custom software needed. I love turning bass all the way to max with treble at medium. But even with both the highest, the sound quality is superb. Having the control of Bass and Treble as well as volume ofc allows you to quickly and easily tune to your needs. One downside I've had is sometimes if the usb connector is nudged the wrong way while plugged in, it'll output non-stop loud static noise until I turn it off and back on again.

It's fine for the price, quality is ok. It measures distortions on the output but most people won't hear them in practice and it's relatively cheap. It can drive hifiman edition Xs just fine (which is often not that easy to drive properly), volume is plenty. However, because it has just analogue potentiometers on the front, they have a bit flimsy feeling and it's easy to get channel volume imbalance (that's for all devices with analogue knobs though), which then kills completely positioning in games - which is why I've returned mine and got instead dac with digital encoder knob for the volume, as that has no such issues with channel imbalance. There is also issue that on each power on of the computer I have to turn on the dac manually as well, as it powers off with the computer but doesn't come back on automatically. There are few other small but annoying things like that with this device, so have a think if that's something that wouldn't bother you in daily use. If not, then it's best one you can get for the price, otherwise look for something else - you can get great ones for just over a £100.

OK Hands up...although I'm a serious music-lover (hence "MusicMan"...) I am also a serious Gadget Geek and when I saw this little beauty on Amazon I just had to have one - especially as I already have the Fosi Audio DAC-Q4 and being delighted with it.... Out of the box I am immediately impressed with the quality of the K5 PRO, it feels and looks gorgeous.....silvery brushed aluminium....also included are three cables, a USB data transfer/power cable, a splitter cable to separate the mic. and headphone inputs and an optical (Toslink) cable. I get the unit connected firstly to my computer and power up the K5 PRO, a 3-second press on the right-hand MODE/VOL knob and there is a reassuring "click" as a relay closes internally and the left hand statue LED illuminates to (by default) USB input. (Each subsequent press moves the input to the next input selection). Worth mentioning here that this K5 PRO only requires one cable connection to my PC for power and data transfer whereas my older Q4 need 2 cables, one for power and a second for data transfer.....a bit cumbersome and the K5 PRO is much better in this respect.... I must confess to not being particularly a gamer, I found the K5 very satisfactory and it worked very well....someone else with more experience in this area might like to add comments....meanwhile I will concentrate on the Audio quality on all the inputs on the K5PRO. USB PC CONNECTION. No problem with the PC recognizing the K5 PRO..... With the Bass and Treble control set at 12 O'clock I cue up one of my favourite songs, WAV of Emmylou Harris "Kern River" and immediately here a very clean, clear sound, crisp mids and highs and good firm Bass line.....next a 24/192 Hi Res of Roger Waters "The Bravery of being Out of Range".....again impressive good clean sound. (By the way I use Audio Technica ATH-WD900 cans plus a pair of OneOdio ones as well....both sounded excellent. I decide, out of interest, to compare this K5 PRO with my older Q4 (see the 5th picture for size comparison)......first thing I notice is an improvement is the Bass response of the K5 PRO, slightly less "lumpy" and also the mid-range on the K5 PRO is cleaner and a little more "forward in the mix" compared with the Q4....a smoother frequency response. All in all a really good start for the K5 PRO....let's move on to .... OPTICAL DIGITAL INPUT I particularly love watching Music videos on TV so I connect the K5 PRO to my TV via the Toslink cable and play Pink Floyd "P.U.L.S.E. "Comfortably Numb".....superb!! After detecting a very slight latency, easily cured by adjusting my TV sound setting, I thoroughly enjoy this great recording....top marks here....moving on to the S/PDIF input... S/PDIF COAX INPUT I connect my FiiO M15S S/PDIF on the 3.5mm output to the coax input on the K5 PRO and run a Hi-RES 24/96 recording of Eagles "Hotel California" and I'm immediately in the groove man!! again, top marks. By the way at all times the e.q. settings are at 12 O'clock and tests show these work very well with improvements in treble being handy on older "duller" mp3 files...I have a few at 256mbps.... IN SUMMARY Can I recommend this Fosi Audio K5 PRO device?? You bet, Any improvements??....yes perhaps a 4.4mm balanced headphone out would be nice and I found the indents on the e.q. controls not always easy to see and I would like to have a slightly larger volume control knob like on the Q4....but really I am splitting hairs as this is a really good little DAC with excellent sound quality. Highly recommended and I hope this helps you.

Superb audio dac small works right out of the box with the switch 2, Endeavor Linux, Debian windows and my ps5 so compatible with lots of different things. Sounds as good if not a touch better than my creative ae-7. Make sure you have good quality speakers and headphones to take full advantage of the clear loud sound. Bought an RCA to 2.5mm cable to my speakers with usb-c input from my devices. The dac came with a toslink cable no use to me as it don't use it but it's there.

Sound quality wise was ok, but USB interface died literally 31 days after purchase (24/07/25-25/08/25) so can’t return and so not much use to me now with only optical / coax inputs working. Doesn’t even make a good paper weight.

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 : bon Note globale : 9/10 - je recommande selon usage et déplacements

🎧 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。

Fosi Audio K5 Pro känns mycket välbyggd med ett chassi i metall och lagom tyngd, så den står stadigt på skrivbordet. Reglagen har en skön och gedigen känsla, och det är smidigt att snabbt kunna justera både bas och diskant. Den drivs via USB-C och fungerar samtidigt som ett externt ljudkort, med anslutning för både hörlurar och mikrofon. Jag har testat den med PC, Mac och iPhone 16 Pro Max, och den har fungerat bra med samtliga. Den driver även mina Sennheiser HD58X utan problem. Utöver USB-C finns stöd för optisk anslutning via Toslink samt RCA, vilket gör den flexibel även tillsammans med annan ljudutrustning. En prisvärd, välbyggd och mångsidig liten hörlursförstärkare.

I’ve been using this DAC/amp for the past couple of months, mainly for FPS games, and it’s been a great addition to my setup. It has no problem driving my IEMs, and the bass and treble controls let me fine-tune the sound to better hear footsteps and directional audio. I’ve also used it with a pair of Corsair headphones, and the dual headphone and microphone jacks make it a convenient all-in-one solution for gaming. The build quality is excellent, the aluminum housing feels solid, has a clean, minimal design, and the rotary knobs have a premium feel with smooth, satisfying resistance.

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 29/2022 Microphone 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.