I am impressed by this DAC. It is quite powerful and easily drives all my headphones. Very clean sound from the legendary Cirrus CS43131 chips. So far it has been plug & play with my Windows 11 PC, with a MacBook Pro, and an iPhone 15, no drivers needed.

I am impressed by this DAC. It is quite powerful and easily drives all my headphones. Very clean sound from the legendary Cirrus CS43131 chips. So far it has been plug & play with my Windows 11 PC, with a MacBook Pro, and an iPhone 15, no drivers needed.

なまらあったかい音がする

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This has great functionality. Build quality is awesome! Sounds fantastic. Highly recommend anybody who's into audio. It just bugs into your phone or your laptop for any other device that you have that can take a USBC plus very low heat level. The light is very bright on the top to let you know the different colors that show the different frequencies that you're using battery life. It doesn't take much from the phone. Heat levels very low. Battery life is non-existent. It doesn't use much

This has great functionality. Build quality is awesome! Sounds fantastic. Highly recommend anybody who's into audio. It just bugs into your phone or your laptop for any other device that you have that can take a USBC plus very low heat level. The light is very bright on the top to let you know the different colors that show the different frequencies that you're using battery life. It doesn't take much from the phone. Heat levels very low. Battery life is non-existent. It doesn't use much

The unit looks / feels nice and works well. The type C cable that came with it feels very nice to the touch and appears to be good quality, but was dead on arrival. The cable does not work at all with my phone (S24+) and when plugged into other devices only drove one speaker and generated random static while playing. I am currently using a standard samsung cable and the dac itself works great.Uses:Headphones: work great as intended with all headphones testes (I don't have any particularly difficult to drive to test them on. I mainly use them with sennheiser hd569's)Stereo systems: sound is clearer with defined instruments sounds. It appears to lesson some of the bass response from my mini system (fosi bt20 pro into some old Kenwood speakers with dual subs) but it might just be more controlled, I just prefer more bass with that setup. It soumds great through an old Phillips receiver powering some old mission bookshelves. (Although I actually had to turn the treble down with that system for for the first time ever with that setup)Car audio: it sounds great and is noticeably much louder. (I had trouble getting to even audible volumes while plugged into my factory Aux port.)Rating: almost 4 stars.. would give 4.5 stars if cable provided worked (and if possible) Great headphone amp / dac

The unit looks / feels nice and works well. The type C cable that came with it feels very nice to the touch and appears to be good quality, but was dead on arrival. The cable does not work at all with my phone (S24+) and when plugged into other devices only drove one speaker and generated random static while playing. I am currently using a standard samsung cable and the dac itself works great.Uses:Headphones: work great as intended with all headphones testes (I don't have any particularly difficult to drive to test them on. I mainly use them with sennheiser hd569's)Stereo systems: sound is clearer with defined instruments sounds. It appears to lesson some of the bass response from my mini system (fosi bt20 pro into some old Kenwood speakers with dual subs) but it might just be more controlled, I just prefer more bass with that setup. It soumds great through an old Phillips receiver powering some old mission bookshelves. (Although I actually had to turn the treble down with that system for for the first time ever with that setup)Car audio: it sounds great and is noticeably much louder. (I had trouble getting to even audible volumes while plugged into my factory Aux port.)Rating: almost 4 stars.. would give 4.5 stars if cable provided worked (and if possible) Great headphone amp / dac

---Update---Fosi has been communicating with me and been very helpful to solve this issue. They are so nice to deal with and glad to have your business and I'm glad to give them mine. They must have the smartest tech support too to be able get through to me the things they have been able to when I've asked them for help. And they have a lot of very great electronics that most of us can't get enough of! :)---Original---I bought a new item and label on box says new too but the round tape that was trying to seal it closed(see picture) was barely left with any adhesive left in it and full of lint as if it had already been opened and tried to be resealed and returned for resale or to be refurbished so I opened it and while opening it it made so much noise from everything loose inside. But I did not buy a used or refurbished item that this appears to be, nothing inside was in place. I figured as long as I had it I might as well give it a listen, so I did. I have many Sabre DAC chip equipped pieces whether in phones or dedicated DAC/amps and most recently a dongle from HiBy, an FC4 and I thought this would be a nice change getting away from ESS chips and give Cirrus chips a go, I couldn't be more surprised when A/B testing them(from memory((from side by side))) that are so very similar. I don't possess the words to describe how minimal the differences there are between the 2 chips are when used in these 2 applications, it is really amazing. I was expecting a lighter, relaxed, atmospheric, type of performance from the DS2 but it is every bit as analytical as the HiBy and Sabre chips. Still worth having both to me by the way, due to power gains had in the Fosi DS2. You wouldn't guess there were gains in power made in by the DS2 until it's about half way turned up then it's just thick and loud sound. Beautiful, thick and loud. I don't quite know how adjustability is done on the DS2, I think instructions suggest downloading the HiBy music player app which in all fairness has very many types of adjustments DACs it's just that the player itself seems to be causing a lit of problems for me, so I'd use it for adjustments and go back to your normal player for your music and and streamer once done with adjustments. That's just what I've found to be best for adjustability on HiBy and may not be true of Fosi. Oh also, the HiBy player tries to load twice when I plug in my USB dongle, so I uninstall the player until I want adjustments. Crazy but true. LolAnyway, I can't say enough good things about this Fosi DS2, I wish it shipped looking like it was actually new and left me not questioning, but it sure seems like a high performance, very high quality, very great value. Performing equal to many above it's weight class and caliber. I'm so surprised it sounds nearly identical to the Sabre DAC chips that I'm used to, I've read so much about Cirrus and thought I knew what I was getting into. I pleased with the sound and will keep the DS2 as part of my setup due it's power alone and clean power at that. And Fosi is now a part of my future equipment too! This really impressed me.I hope I've been helpful,Thank you.

---Update---Fosi has been communicating with me and been very helpful to solve this issue. They are so nice to deal with and glad to have your business and I'm glad to give them mine. They must have the smartest tech support too to be able get through to me the things they have been able to when I've asked them for help. And they have a lot of very great electronics that most of us can't get enough of! :)---Original---I bought a new item and label on box says new too but the round tape that was trying to seal it closed(see picture) was barely left with any adhesive left in it and full of lint as if it had already been opened and tried to be resealed and returned for resale or to be refurbished so I opened it and while opening it it made so much noise from everything loose inside. But I did not buy a used or refurbished item that this appears to be, nothing inside was in place. I figured as long as I had it I might as well give it a listen, so I did. I have many Sabre DAC chip equipped pieces whether in phones or dedicated DAC/amps and most recently a dongle from HiBy, an FC4 and I thought this would be a nice change getting away from ESS chips and give Cirrus chips a go, I couldn't be more surprised when A/B testing them(from memory((from side by side))) that are so very similar. I don't possess the words to describe how minimal the differences there are between the 2 chips are when used in these 2 applications, it is really amazing. I was expecting a lighter, relaxed, atmospheric, type of performance from the DS2 but it is every bit as analytical as the HiBy and Sabre chips. Still worth having both to me by the way, due to power gains had in the Fosi DS2. You wouldn't guess there were gains in power made in by the DS2 until it's about half way turned up then it's just thick and loud sound. Beautiful, thick and loud. I don't quite know how adjustability is done on the DS2, I think instructions suggest downloading the HiBy music player app which in all fairness has very many types of adjustments DACs it's just that the player itself seems to be causing a lit of problems for me, so I'd use it for adjustments and go back to your normal player for your music and and streamer once done with adjustments. That's just what I've found to be best for adjustability on HiBy and may not be true of Fosi. Oh also, the HiBy player tries to load twice when I plug in my USB dongle, so I uninstall the player until I want adjustments. Crazy but true. LolAnyway, I can't say enough good things about this Fosi DS2, I wish it shipped looking like it was actually new and left me not questioning, but it sure seems like a high performance, very high quality, very great value. Performing equal to many above it's weight class and caliber. I'm so surprised it sounds nearly identical to the Sabre DAC chips that I'm used to, I've read so much about Cirrus and thought I knew what I was getting into. I pleased with the sound and will keep the DS2 as part of my setup due it's power alone and clean power at that. And Fosi is now a part of my future equipment too! This really impressed me.I hope I've been helpful,Thank you.

Sounds excellent with my Sony Xperia 1 V 256/512 and the Sony MDR-1AM2 wired headphones. My regular phone is a LG v60 which has built-in 32bit DAC only with wired headphones. I purchased the Sony phone has a Xmas toy for myself on sale. This DAC greatly improved the sound and volume of the Sony. In fact to my ears the sound with volume control is louder than the LG v60 and just as clean and clear. All at compact and neat package. Everything was included in the box get going. When I plugged the device into the phone Sony did a quick software update and I was off and listening. I'm a happy camper now. I wish Sony Xperia 1 V came with a built in DAC/headphone amp but this is low cost substitute. I'm very happy...

Sounds excellent with my Sony Xperia 1 V 256/512 and the Sony MDR-1AM2 wired headphones. My regular phone is a LG v60 which has built-in 32bit DAC only with wired headphones. I purchased the Sony phone has a Xmas toy for myself on sale. This DAC greatly improved the sound and volume of the Sony. In fact to my ears the sound with volume control is louder than the LG v60 and just as clean and clear. All at compact and neat package. Everything was included in the box get going. When I plugged the device into the phone Sony did a quick software update and I was off and listening. I'm a happy camper now. I wish Sony Xperia 1 V came with a built in DAC/headphone amp but this is low cost substitute. I'm very happy...

This Cirrus CS43131 based DAC/ Amp "dongle" combo is a little wonder. I decided to give it a try after reading the positive review on Audio Science Review. I was on the lookout to replace my aging FiiO Alpen portable DAC and this appeared to be the perfect replacement.It is has a diminutive size and no rechargeable battery which makes it light and eminently portable. It does take power from the unit it is hooked on but the drain is not all that bad especially if used with efficient headphones, especially IEMs. External volume controls and an additional (unheard at this price) balanced headphone out add incredible value to an already fully featured unit.For actual measurements and all that jazz you can refer to the extensive set performed by Audio Science Review. Long story short for the TL:DR people, the measured performance is exceptional, rivaling good desktop/ dedicated DACs/ Amps, featuring low noise/ distortion/ jitter, high linearity/ dynamic range, great filtering and very decent distortion free output power (43mW into 300 Ohm load and 172mW into 33 Ohm load).I tested this unit hooked up to my iPhone 13 Mini, iPad Air 6 (M2) and to my PC Workstation, running iTunes/ Apple Music/ Foobar2000/ JRiver MC33. The headphones tested with it were: HiFiMan HE400i and RE-400, PSB M4U, Beyer DT240 Pro, Final E-4000, Moondrop CHU II. I am very familiar with these headphones, I used some of them for years hooked up to some pretty decent pieces of gear in my possession, such as Accuphase and NAD preamps, Arcam, Denon, Rotel, Topping or SMSL DACs and my Nak, Oracle analog front ends.Now, with the name dropping aside, I will touch briefly onto the sound of this unit.This diminutive DAC/Amp had no problem driving any of the above mentioned headphones, including the HE400i, whose planar design is generally posing a challenge to portable gear. The Fosi DS2 handled everything with poise and grace, without any hint of distortion or clipping.As for the "sound" itself... well it sounds like nothing, as it should. The Fosi DS2 has no "character" of its own so does neither add nor subtract anything from the signal it is being fed. Similarly with any true high resolution/ high fidelity playback unit, the music comes thru clear and uncoloured, faithfully representing the recording or the material being played. I like using a FLAC version of the Triangle CD Demo, which has pretty much everything you want in terms of sound, from closed miked voices and instruments to large orchestral ensembles, from intimate jazz tunes to big dynamic swinging symphonic pieces or glass shattering, garage door banging sounds. This recording, along Pink Floyd's DSOTM and Mike Oldfield's Tubular Bells II are the ones I'm typically relying upon in this kind of subjective testing.There isn't a hint of harshness, sibilance, bloom or any of those things professional gear reviewers sometimes use to describe what they hear. The Fosi DS2 would leave these reviewers with almost nothing to say really, its musical performance reflects closely the unit’s exemplary, almost textbook perfect bench performance.100% recommended, this diminutive DAC/ Amp unit punches way above its weight. It matches or it exceeds performance at almost any price level.

This Cirrus CS43131 based DAC/ Amp "dongle" combo is a little wonder. I decided to give it a try after reading the positive review on Audio Science Review. I was on the lookout to replace my aging FiiO Alpen portable DAC and this appeared to be the perfect replacement.It is has a diminutive size and no rechargeable battery which makes it light and eminently portable. It does take power from the unit it is hooked on but the drain is not all that bad especially if used with efficient headphones, especially IEMs. External volume controls and an additional (unheard at this price) balanced headphone out add incredible value to an already fully featured unit.For actual measurements and all that jazz you can refer to the extensive set performed by Audio Science Review. Long story short for the TL:DR people, the measured performance is exceptional, rivaling good desktop/ dedicated DACs/ Amps, featuring low noise/ distortion/ jitter, high linearity/ dynamic range, great filtering and very decent distortion free output power (43mW into 300 Ohm load and 172mW into 33 Ohm load).I tested this unit hooked up to my iPhone 13 Mini, iPad Air 6 (M2) and to my PC Workstation, running iTunes/ Apple Music/ Foobar2000/ JRiver MC33. The headphones tested with it were: HiFiMan HE400i and RE-400, PSB M4U, Beyer DT240 Pro, Final E-4000, Moondrop CHU II. I am very familiar with these headphones, I used some of them for years hooked up to some pretty decent pieces of gear in my possession, such as Accuphase and NAD preamps, Arcam, Denon, Rotel, Topping or SMSL DACs and my Nak, Oracle analog front ends.Now, with the name dropping aside, I will touch briefly onto the sound of this unit.This diminutive DAC/Amp had no problem driving any of the above mentioned headphones, including the HE400i, whose planar design is generally posing a challenge to portable gear. The Fosi DS2 handled everything with poise and grace, without any hint of distortion or clipping.As for the "sound" itself... well it sounds like nothing, as it should. The Fosi DS2 has no "character" of its own so does neither add nor subtract anything from the signal it is being fed. Similarly with any true high resolution/ high fidelity playback unit, the music comes thru clear and uncoloured, faithfully representing the recording or the material being played. I like using a FLAC version of the Triangle CD Demo, which has pretty much everything you want in terms of sound, from closed miked voices and instruments to large orchestral ensembles, from intimate jazz tunes to big dynamic swinging symphonic pieces or glass shattering, garage door banging sounds. This recording, along Pink Floyd's DSOTM and Mike Oldfield's Tubular Bells II are the ones I'm typically relying upon in this kind of subjective testing.There isn't a hint of harshness, sibilance, bloom or any of those things professional gear reviewers sometimes use to describe what they hear. The Fosi DS2 would leave these reviewers with almost nothing to say really, its musical performance reflects closely the unit’s exemplary, almost textbook perfect bench performance.100% recommended, this diminutive DAC/ Amp unit punches way above its weight. It matches or it exceeds performance at almost any price level.

Great sound, dead silent, balanced audio output. If anything, my only complaint is that it can't achieve dangerous volume levels on my 300Ω Sennheiser HDxx headphones.It's USB powered, so it'll use the battery from your phone or portable device if that's what you're plugged into. The louder it is, the shorter the battery life. Still: I had it at a reasonable level (~75 dB or so) and it lasted hours while barely denting my iPhone's battery)It can get a little toasty during operation, but it's not too hot to touch or hold. It's built well, looks solid & sleek.It works great with my iPhones, MacBooks, and Linux desktop machines. With that kind of compatibility, I imagine it'll work well on just about anything.

Great sound, dead silent, balanced audio output. If anything, my only complaint is that it can't achieve dangerous volume levels on my 300Ω Sennheiser HDxx headphones.It's USB powered, so it'll use the battery from your phone or portable device if that's what you're plugged into. The louder it is, the shorter the battery life. Still: I had it at a reasonable level (~75 dB or so) and it lasted hours while barely denting my iPhone's battery)It can get a little toasty during operation, but it's not too hot to touch or hold. It's built well, looks solid & sleek.It works great with my iPhones, MacBooks, and Linux desktop machines. With that kind of compatibility, I imagine it'll work well on just about anything.

Easy to connect and energy efficient. Simple but rugged. Beautiful balanced sound that rivals my Questyle M15C which costs the double. It has plenty of power with a natural detailed sound. The cable looks and feels a little flimsy, but it worked fine and I think is going to last. One thing I loved is the ability to precisely adjust the volume with it, instead of my phone. I love this product and I fully recommend it.

Easy to connect and energy efficient. Simple but rugged. Beautiful balanced sound that rivals my Questyle M15C which costs the double. It has plenty of power with a natural detailed sound. The cable looks and feels a little flimsy, but it worked fine and I think is going to last. One thing I loved is the ability to precisely adjust the volume with it, instead of my phone. I love this product and I fully recommend it.

This thing sounds awesome. I have used many dongles till now even more expensive ones than Fosi DS2 but I liked the sound of DS2 more than any of them. It is musical sounding with good technicalities too

This thing sounds awesome. I have used many dongles till now even more expensive ones than Fosi DS2 but I liked the sound of DS2 more than any of them. It is musical sounding with good technicalities too

Very happy, wasn't expecting this much clean power. Can drive my Aeon Noiree's to satisfactory levels in balanced mode before going into distortion.

Very happy, wasn't expecting this much clean power. Can drive my Aeon Noiree's to satisfactory levels in balanced mode before going into distortion.