Fosi Audio Q4 Headphone Amplifier DAC Converter, Mini Stereo Digital-to-Analog DAC Amp, USB Coaxial Optical to 3.5MM AUX RCA Jack, for Computer Desktop Powered Active Speakers Up to 24 bit/192 kHz

Having previously purchased two ‘cheap’ DAC Converter units and really struggled to get any decent level of sound through them, I decided to bite the bullet and pay a bit more for the Fosi Audio Q4 Headphone Amplifier DAC Converter. I am using this unit with a TosLink optical cable and it has exceeded all my expectations. This little device punches above its weight and delivers a remarkable listening experience that I think would be hard to match in its price range. It is a very compact and sturdy design, with a solid and premium feel to it. I am using this device with an LG Smart TV that is fitted into a bed unit (so TV rises from foot of the bed). As such, we only ever use this TV with headphones, so achieving decent sound through headphones is essential to us. As previously mentioned, I had struggled to get any decent level of sound through two cheaper versions of DAC converters (the sound levels were so quiet we had resorted to always using subtitles when watching TV), but I just left the cables in place that were used with those and plugged them into the Fosi unit – which clearly showed me there was nothing wrong with the cables I had been using and the issue was with the cheap DAC units. With the Fosi unit, everything works brilliantly and the sound quality and levels are awesome. I am not using particularly expensive headphones – they are wired and have an impedance value of 32 – which should have been good enough with the original ‘cheap’ DAC converter but simply wasn’t The Fosi Audio Q4 Headphone Amplifier DAC Converter is an absolute gem – although it should be noted I have only tried connecting via Toslink optical cable so cannot comment on other connection options. It’s hard to believe that such a small, affordable device can provide this level of audio performance. Highly recommended!

I needed a new DAC to partner a Fosi amp (BT30D Pro) I just bought after my last 20-year old amp stopped working so tried this new one and I think it's very good, especially for the price. The build is what you expect, weighty, smooth, and has a great all metal body. The switch is tactile, the selector knob is good, and it's easy to setup. I'm using its optical input, connected to a Wiim Mini, which is streaming lossless music from a Roon server. The DAC is then connected via line out to the Fosi amp, and the amp itself is driving a pair of Wharfedale Linton Heritage. The sound to my ears is great, full and balanced across the range. I appreciate the tone controls on the amp to fine tune the sound. I'm quite fussy when it comes to the quality and have gone through a few other DAC/amp combos prior to this and have seldom been as satisfied as I am now. Now I can relax and enjoy the music. UPDATE: I can hear the clicking mentioned by others when I switched to USB audio in (which is also power in). Between tracks streamed from my Roon server I can hear what sounds like faint clicks so I have decided to return the unit. UPDATE 2: Fosi Audio contacted me with a firmware update which fixes the clicking sound, which was the DAC switching states when there was no incoming audio signal. Firmware fixed the problem and that DAC sounds really good again with USB audio. I'm very pleased. Great customer service, happy to continue with Fosi products and will purchase another Q6 soon.

I recently recieved a Beyerdynamic DT-990 Pro 250 Ohm, so I decided to do some research on the best budget DAC/Amp as the motherboard sound card is pretty bad and I had static white noise on loud volumes and random crackling. So I came across this one in some YouTube reviews and they all mentioned how it's a great budget USB DAC for the price. And I knew I had to try it out and see if it's good ( I could return it if I didn't like it ). And the sound quality had a reasonable improvement, it wasn't mindblowing but it wasn't worse than my current setup, and I can esure you it's great for the price. The soundstage is decent and the volume is perfect for my 250 Ohm headset. I've spent some time messing around with the 'Bass' and 'Treble' knobs on the front to get my ideal sound and i've settled with the Bass being about halfway and Treble about a third a way up. This balances out the Bass and enhances the treble ( good for gaming ).

I review things to death and although this is the first DAC I’ve bought the reviews were excellent and I know that Fosi is an excellent brand with excellent products. So I bought it. My experience? Well it does the job, it makes my tv sound 100% better through my hifi amp.

I asked the question if this would work as a gaming DAC and output sound to my headphones and still have the ability to mic into the motherboard of my PC. I was told no but I can say that this setup configuration works without issues for me. (Runbing Windows 10, b550 motherboard, V-moda BoomPro mic, Philips shp9500, splitter cable). I was advised by a friend, researched throughly and came to the conclusion that this would be a good quality setup. The addition of this DAC has made it a perfect gaming setup for me and at a good overall cost. PROS: • this DAC played a part in delivering better performance than most gaming headsets. • I didn't think that bass and treble control would be very useful but I now find myself regularly tweaking them in various situations to optimise game sound and music to my taste. • Nice weight to the unit yet quite compact in size. • Control dials have a nice quality feel to them. • Noticeable cleaner sound when compared to motherboard output. • Good sound stage which is perfect for gaming. • I HAVE NO PROBLEMS WITH MIC INTO MOTHERBOARD WHILST USING USB TO DAC. CONS: • For convenience only, it would have been nice to have the mic pass through without having to split into mobo. CONCLUSION: I would definitely recommend this to anyone looking for a decent gaming sound experience at a good price point.

I don't very often leave reviews but I felt this deserved one. I brought this in the hope I could take sound from my smart TV which at the time of purchase I never realised didn't have a 3.5mm headphone jack. I was completely baffled by this as I hadn't seen it before. So my only option was Bluetooth headphones, after months and months of crackles and sound dropping out and very bad audio/video sync issues I started looking into possible solutions and reasons why it was happening. I found many posts and pages claiming its the firestick or its the streaming service, possibly the TV, but then I came across posts about Bluetooth headphones and TVs, specifically about how it's a poor way to listen to audio? By this point I'd already brought a 2nd pair of headphones thinking mine were faulty. I started researching into ways of getting sound from TVs into headphones via amps and discovered these DAC amps.. I was skeptical about this purchase as its fairly expensive and some mixed reviews on here but the sound produced from this little amp (and I mean little) is extremely impressive. I've not tested it on any big over the top action movies but the sound is very clean and clear the bass and treble make a noticeable difference. Now onto music... Playing some bassy songs from YouTube and my headphones came to life and they boomed. Bass was hard and full, very clear mids and treble no distortion or crackling or white noise, I'm using some very old turtle beech headphones that I no longer use for my xbox, admittedly they were around £200 when released but nowhere near some of the headphones available today and the sound was awesome, volume turned up around 3/4 and you can take headphones off and hear the music and bass clearly without needing to put them on, I imagine a good action film with lots of explosions will also sound brilliant. If you've managed to read this far I apologise for the long review 😊 if your in the same boat as me and need to get sound from your TV then get this, it's highly rated Compared to others more expensive in its class, I got this on sale with a additional 15% off so cost around £56 and I would of been happy at full price. I can now watch TV without 1-2 seconds sync delay 👌👌 BTW I'm using this via the optical cable which is supplied, and powered by USB from my TV, again this cable is supplied. I hope this helps people in the same position I was in.

This review is for beginners like me. I am a beginner audiophile and spend a lot of free time training my fresh ears. I invested a lot of money on amps, receivers, streamers like Yamaha and wiim, but I was surely missing something. I even purchased expensive over ear headphones, still couldn’t get to that desired spot. My listening preference is smooth heavy bass with smooth highs but low and thin mids. I kinda hate boomy mids and keep human voice (1khz) low on EQ graph. Anyways I googled my problem and came across the word DAC. I was doomed seeing the prices and wondered what would this device do to me. After lot of research I ordered this Fosi Q4 because it had some EQ knobs etc and seemed a good balance of quality and price at £55ish. OMG i cannot now listen to anything without this device. It helped sweeten the highs while pumping and widening the lows. I compliment it with Wiim mini that helps tweak the EQ to my preference by lowering the mids and i could control the final bass and treble on DAC itself. The only downside is one DAC is not enough :) Please try one you’ll regret if delayed.

Seems to work well - no hiss on mouse movement or interference at this point. Whats not obvious at first glance is that for PC, it needs two inputs, the USB to PC (expected), but also a USB to USB C (provided), but what it doesn't provide is an adapter. Two shortcomings here: 1) Could have been powered over USB, no need for a second connection. 2) Cheaped out by not providing a USB AC adapter I would have powered off my PC (microUSB to PC USB), however I have run out of ports.

له عندي 5 شهور ما عندي خبرة كبيرة هذا أول amp/dac اشتريه لكن استخدمه مع سماعة Hifiman he400se ما ندمت أبداً معطيها طاقة ممتازة والصوت صافي ما لاحظت أي تشويش أو مشكلة

Nice product, why spend more on expensive amps. This little baby does it just as well as higher end ones. Worth the purchase.

Bonjour ! J'ai fait l'acquistion de ce DAC Ampli car la carte son intégré de mon pc ne me permettait pas de profiter correctement de mon nouveau casque, le DT 770 Pro. J'ai commencé mes recherches en ayant aucune connaissance dans le milieu de l'audio, pour être honnête, je ne suis pas plus avancé à l'heure qu'il est mais, mon budget et mes critères m'ont amené à ce produit. Beaucoup d'avis internationaux, beaucoup d'avis assez incomplet, c'est pour cela que je vais essayer de faire de mon mieux pour vous décrire le produit. La première chose à savoir est que l'alimentation du DAC se fait via un cable micro usb, cela m'a déstabilisé au début, le câble USB-MIDI ne servant qu'à faire le lien entre le DAC et l'appareil utilisé (ici mon ordinateur). L'installation sur mon PC s'est fait automatiquement : une fois branché, le driver s'est installé automatiquement et mon pc l'a reconnu. Niveau connectique du casque, c'est une entrée Jack 3.5mm. Il y a 3 modes réglable via un petit "levier" : USB, Optique et Coaxial. Ne connaissant et n'uitilisant pas les deux derniers, je vous donne uniquement mon avis sur l'utilisation USB. Le produit en lui-même a selon moi un aspect assez qualitatif, finition en métal, les différents boutons sont solides et agréables à utiliser. NIVEAU SON maintenant, c'est là où mon manque d'expertise va entrer en jeu malheureusement, je ne pourrais pas vous donner d'aspects vraiment technique sur le rendu du son etc, je vais donc juste vous faire un comparatif entre l'utilisation de mon casque avant de faire l'acquisition du produit et une fois le produit acquis. Mon casque a une impédance de 80 Ohms, mais la carte son intégré à ma carte mère (Asus TUF B450M Plus Gaming), n'était clairement pas suffisante pour pousser le casque correctement : le son était très faible, il y avait des petites interférences, assez rares mais assez embêtantes avec un casque de cette qualité, le son saturait rapidement malgré un niveau de son en dB assez faible... et le son paraissait très étouffé. Une fois le DAC Ampli installé, sans même toucher aux boutons permettant de régler les basses et les aigus, le rendu audio s'est métamorphosé : - Son beaucoup plus clair, plus net; - Volume très puissant, réglable facilement via la "molette" de volume qui par ailleurs est très agréable à utiliser; - Le correcteur de tonalité (ajustement des graves et aigus) joue vraiment beaucoup dans la plus value de ce produit selon moi : il offre un très bon rendu, vous permet d'ajuster vos écoutes selon vos préférences et le type de musiques écouté; - J'ai enfin pu découvrir les basses de mon casque qui ont un rendu vraiment prenant. Conclusion : Je ne suis pas audiophile pour un sous, mais j'adore écouter de la musique, et ce DAC Ampli combiné à mon casque m'ont fait re découvrir des musiques que j'écoute depuis des années. C'est la première fois de ma vie que j'ai l'occasion d'écouter de la musique avec une qualité pareil, ce sont les petits détails qui changent toute l'expérience. Je ne peux que recommander ce produit au vu de son prix, sa qualité et ses fonctionnalités. Le seul "inconvénient" (qui n'en est pas un pour moi) du produit peut être l'alimentation, qui se fait par Micro USB. J'espère avoir pu vous aider via cet avis, ceux qui sont dans ma situation et qui cherchent un DAC Ampli pour driver un casque sur PC notamment, foncez !

Prima voor de prijs. Mijn koptelefoon klinkt niet best als ik deze direct aansluit op mijn laptop. Uiteindelijk gekozen voor dit apparaatje. Wat een verbetering! Ook kan ik nu mijn favoriete nummer op een hoger volume afspelen.

Hooked this up to a JVC dvd player for playing CDs was just amazed how much the sound quality improved for a small outlay well worth the money always love Fosi products.