SK02 DAC Amp Headphone Amplifier Desktop USB C to AUX Digital to Analog Audio Converter Adapter Preamp Optical to 3.5mm 4.4mm Balanced Combo for Home Audio System

Excellent sound, and as a desktop DAC/Amp, this thing should be fed by a USB port with some real power capacity (or at least not a portable like a tablet or phone). They seem to be able to drive my 300Ω Sennheiser to dangerous volume levels without distortion. I'm not in the habit of listening at that kind of volume for very long. I don't hear any noise or distortion at any volume, in fact - the DAC & Amp are both excellent. The build quality appears top notch, though the case is clearly an area where some cost cutting happened (it's a bit of a generic case, but serviceable). The bottom of the case has some non-slip silicone pads integrated into it. I wish it covered the whole bottom, but it's still better than nothin'. It's also nice to have an optical in. I'm not sure if I'll ever use it, but options are good. I love being able to use the push knob to pause/play skip music, and even turn the SK02 off (rather than an always-on power sink). I bought mine with a package deal that was cheaper to get an Orange knob - I'm not entirely sold on the look, but it's certainly easier to find the knob. The SK02 a bigger amp than the diminutive Fosi DS2, and is definitely louder. It also has more features. I've got both, love both - they're different horses for different courses.

Although I returned this Fosi Audio SK02 DAC Amp Headphone Amplifier I am giving it 5 stars because for what it is and for it's price I think it's a good value and performed well for me while I was trying it out. One of the reasons I considered this product was because of the high headphone power output and inclusion of both single ended and balanced headphone outputs. The power was definitely sufficient to drive all the headphones I own (Sennheiser HD6XX, Sennheiser 560S, HiFiMan Edition XS, FiiO FT1, Grell OAE1) although I didn't try it with some vintage 600 Ohm headphones I own. However, I returned it because I really needed to be able to see the volume level that was set more clearly than what the small led light could indicate. That single light was too vague to know where in the scale the volume was set. I have opted to choose another product that has an led screen which can constant show the volume from 0 to 99 at all times. This may not be a consideration for other people however. I also liked the form factor and design which took up less space on my desktop than the other product I ended up selecting. So, in summary, I consider this a very good product that unfortunately just didn't meet my specific needs. If the lack of constant volume level indicator and led screen isn't an issue, then you would probably be happy with this DAC/Headphone Amp.

Do you buy for sound, or to impress with your style? If the latter it's not for you. But I love the audio coming out of this box. Seriously - give it a try - the better your can's the better the sound.

The Fosi Audio SK02 DAC amp is a compact, affordable option with a clean, neutral sound signature, making it ideal for detail-oriented listening. Powered by the ESS Sabre ES9038Q2M DAC, it offers clear audio with a slight emphasis on mid-to-high frequencies, which suits analytical listening but can be bright for sensitive ears. It includes both 3.5mm single-ended and 4.4mm balanced outputs, delivering up to 1100mW to power even demanding headphones. Its sturdy aluminum build, versatile connectivity, and intuitive volume control make it a practical choice for budget-conscious users​

Works very well on a PC - I could not be happier for headphone listening on my PC. I use the USB input and 3.5mm headphone jack for the output. It installed perfectly on my Windows 11 PC, which recognized it right away. I don't really know if it installed any drivers, but it doesn't matter to me since it just works and sounds great. It's the best $90 I've spent on my audio/PC system. Highly recommended.

Bought this to power a pair of bluetooth speakers hoping to get more volume when using my PS5.Works as advertised,plugged in to a wall outlet using usb adapter,and optical cable to tv.Sound was crisp and clear,but about the same volume levels I was getting using bluetooth via my av receiver,as my av receiver has no headphone jack.Will try another model.

Awesome portable DAC with balanced output, plenty of power for my headphones and pairs with my Fosi SK01's like a charm. Love the volume wheel, another super cool and premium quality item from Fosi Audio. Highly recommended, 6 stars!

plenty powe on the balanced side dac itself is transparent dos not colo uon noise is non existent even at hi levels

最初の据え置き機として、お勧めしたい品。 余計な事は考えずに、ただUSB-C端子に刺すだけでOKな潔さ。 コンパクトで場所を取らないのも良い。 肝心の音質ですが、やや分析傾向で広い（使用目的に合わせ、イヤホンやヘッドホンを変えましょう） 純粋に音楽用としても素晴らしいのですが、本機の場合はゲームでの使用で最も本量が発揮されます。 音の定位が良い事と、音場が広いことに加え、機体上面に配置されたボリュームノブが素晴らしい。 マウスやキーボードから手を曲げることなく、その特徴的な大きなボリュームノブを直感的に回せます。 ボリュームノブはロータリーエンコーダー式（無限にクルクル回せるタイプ）で、操作が軽い上に、シビアな調整を求められない造り。 広い音場に、直感的でストレスのない音量コントロールは特筆もの。 ぜひ一度体験して欲しいです。 もちろん、動画や音楽の時にも気軽に使えます。 なお、スマホやタブレットで使う場合は、電源に注意が必要です。 光接続端子も使えますが、この場合、やや音場が狭くなります。 個人的には、セルフパワーや給電機能があるタイプのUSBハブを使用した方が良いと思います。 USB-Cケーブルはノイズ対策加工と、十分な給電能力があるものを選ぶと良いでしょう。

Bought this dac to run my sundara at 1100mw at 32ohm only to realise post delivery that the headphones didnt come with a 4.4mm balanced cable , my only option was to use the 3.5mm port on the dac , i enabled the gains and the power output of the 3.5mm was good enough to drive the sundaras crisp and clear , now i need to find a 4.4mm balanced cable for my sundaras so that i can use the full potential of the dac , also this dac wont work with iphone as it’s power consumption is intentionally high, works with windows linux and mac , overall a good dac and should be able to drive small to big headphones equally

Petit ampli casque qui est surprenant tellement il délivre un son puissant et cristalin. Associé à un ATH M50X, je trouve rien à redire. Qualité du boitier au top, il suffit de connecter en USB C de par et d'autre... à acheter les yeux fermés.

Lieferung war schnell und gut. Produkt ist sehr solide und wertig. Klangverbesserung zum on-board sound ist signifikant verbessert! Tolles DAC!

Smaller form factor ideal for audio at your desk. Flawless sound, whatever headphones you are using, or passthrough to an amp. Solid build quality, performance and usability. Powered by USB. Balanced or single-ended output... it just sounds really good Sound reproduction is better than you are likely able to hear. Yes, you could spend more on something else... but you really don't need to. Take the money you save and upgrade the headphones that you plug into it, if you need to. Overall, an excellent product.