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FiiO

FiiO K3 Type-C USB DAC Headphone Amp

    • Based on 1,438 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Dec 28
Order within 3 hours and 32 minutes
Available payment plans shown during checkout

Size: K3 black


Features

  • Features
  • Usb Type-C DAC: supports up to 384kHz/32bit
  • Power supply via the USB port: convenient and safe
  • Various ports: lineout single-ended/ balanced headphone output coaxial and optical
  • High-performance discrete headphone drive and circuit protection

Product Dimensions: 2.76 x 2.28 x 0.87 inches


Item Weight: 2.89 ounces


Item model number: 8486


Batteries: 1 A batteries required.


Is Discontinued By Manufacturer: No


Date First Available: November 21, 2018


Manufacturer: FiiO


Language: English


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Dec 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Tiny and portable, but still sounds great. DOES work with phones, but...
Size: K3 black
Review Image by Bradley Bradley
Review Image by Bradley Bradley
Review Image by Bradley Bradley
Review Image by Bradley Bradley
I got the K3 because I was looking for a good DAC/AMP unit around the $100 mark. I saw many recommendations, and the both the FiiO Q1 Mk2 and the FiiO E10k came up quite a bit. I was mostly looking for something to use at my desk at home, but the portability of the Q1 Mk2 in particular appealed to me, since being able to take it with me to use with my laptop or even my phone would be a huge bonus. The K3 is (or at least WAS when I bought it) very new and has few reviews, but based on the recommendations of FiiO's other products, I decided to give it a try. My initial impression after opening it was that it was WAY smaller than I expected it to be. The K3 is barely any bigger than a container of Tic Tacs (see my second picture for a size comparison). It feels to be very well-built. The body is metal with a nice matte finish, the switches all have a satisfying click to them, and the volume knob spins smoothly with just enough resistance to avoid accidentally being changed. I first plugged the K3 into my PC using the USB 1 mode and windows immediately saw it and set it as my default output device. I then installed the drivers (they were kind of hard to find at first, but FiiO has a link to them on the K3's FAQ on their website). The driver didn't install properly on my first try, but I tried again and it worked right away, so I won't fault FiiO for that. Compared to the output on the headphone jack, the sound coming out of my headphones when connected to the K3 is worlds ahead. Not only is the overall quality better, but the volume can get SO MUCH higher. Previously, I could set my volume to whatever I wanted in windows and listen to music that way with no problem. But with the K3, I'd definitely hurt my ears if I set my volume to 100% on both it AND my pc at the same time. I tried it once just to see how loud it could get, and I was able set my headphones down on my desk since the sound coming out of then was easily loud enough to pass for being a decent set of desk speakers if you didn't know better. Given, these results are with Audio Technica M50x's, which are not hard to drive at all, so take that with a grain of salt if you have headphones with significantly higher impedance. That being said, I'm inclined to believe FiiO when they say these are fine for anything in the < 150Ω range. Despite FiiO's FAQ saying "Mobile devices are not recommended." I couldn't resist giving it a try anyway. I figured that it's more than small enough to take with you, uses USB Type C, in USB 1 mode it's supposed to be driverless, and they weren't explicitly saying it WOULDN'T work with a phone anyway, so there's theoretically no reason why it shouldn't work. I plugged it into my phone (a Galaxy S8+) using a USB C to USB C cable and set the K3 to USB 1 mode. I was expecting to have to put in some effort to get it to function, but surprisingly it just started working immediately. Now, to FiiO's credit, I can understand why they say that the K3 is not recommended to be used with phones. Unlike the Q1 Mk2, the K3 does not have a battery, meaning that when plugged into your phone, it is draining your phone's battery for power. But if battery life is not a concern for you, then it DOES seem to work with android at least. Next, I decided to see if I could solve the problem of draining the phone's battery. I got out a USB C hub that I had laying around (an Insignia one I got from Best Buy if anyone cares) and plugged it into my phone. I plugged the K3 into the hub's Type A port using the cable that came with it, and plugged my phone's charger into the Type C port of the hub (see picture 3). That seemed to accomplish what I was going for. The K3 output my music as normal, and my phone was charging at the same time (see picture 4). Of course this mess of cables isn't exactly an elegant or ideal solution, but it does work. I could see this being useful during long trips when you're going to be sitting in a vehicle for a long time, but it's probably not a good idea for just walking around. Also keep in mind that you could easily swap the wall charger for a battery bank and achieve the same effect if a power outlet isn't available. Overall, I'm very happy with the K3 so far. ... show more
Reviewed in the United States 🇺🇸 on December 14, 2018 by Bradley Bradley
    • Incredible value, incredible sound
Size: NEW K3 Titanium
Paired with wired Audio-Technica ATH-MSR7bGM Over-Ear High-Resolution Headphones, sound quality is noticeably better than my audio -Technica ATH-M50xBT
Reviewed in the United States 🇺🇸 on March 17, 2023 by Chris G
    • It's a FiiO- Do you expect anything less?
Size: K3 black
FiiO has been, for years, making audio magic in absolutely minuscule form-factors that greatly enhance the sound of any headphones, whether or not they require an amp due to high impedance. This specific DAC+Amp meets or exceeds all of the standards that I expected. It runs using both power and audio outputs from your computer (or whatever you plug the USB-A end into. I haven't tried experimenting with other sources using adapters but I'm sure a newer smartphone could easily run these.) Sound Review: Incredible. There really is no other way to describe this tiny little aluminum box. It acts as a replacement/brand new sound card for your computer (with on-board LED to show sampling rate and WORKING VOLUME/POWER KNOB). It is night and day with and without the k3 on almost any headphones over $50. I even noticed an improvement on the incredibly inexpensive and highly touted Koss KSC-75. With bass boost off, the sound stage opens and widens-for closed back headphones this is a nice touch, but for open backed cans this is absolutely game-changing. My Grados, Fidelios and AKGs all receive and absolutely marked improvement in overall soundstage size and instrument separation. Turning on the bass boost keeps these same improvements, while increasing low-end response and not sacrificing any audio quality for higher-end cans. I highly recommend pairing this with Philips Fidelio X2s, they compliment each other like dinner and wine at a high end steakhouse. I have also used all line out options (3.5mm, optical, coax) to run my 5.1 surround setup with Sony receiver and active subwoofer. I am glad to say all of the audio enhancements that the k3 brings to headphones it also brings to any low-to medium grade surround system. I use this mainly with my Grado SR125e and Philips Fidelio X2HR, and they are a bit better fit for the Fidelios. For higher demand or very high impedance cans, a dedicated amp and separate DAC are most likely required. To that point, the max impedance I would use the k3 for is around 300 ohms- it is not the loudest (even with gain on) or most powerful when returning audio to headphones. The DAC inside is, in my opinion, much better than the internal amp. All of that said, I highly recommend this little piece of magic to anyone who already has higher end audio equipment and is looking to get more out of it, or those with an underpowered stereo receiver without being forced to buy a new one. This thing is, as I mentioned, magical. I can't listen to music without it now. It also made me get a subscription to Tidal to allow hi-res, master quality streaming from my PC to take full advantage of the high sampling rates this allows. I got a 25' coax cable to be able to use this from my coffee table when running my surround system. My only complaint is the lack of on-board settings and switches, but this is all taken care of with the FiiO app for mac or windows, which will automatically detect, integrate and use the k3 as your new sound output card. If I could give more than 5 stars I would. Completely transforms headphones/speakers into an incredible listening experience for the entry-level audiophile. Make sure you have some high sample rate or lossless audio files to make it run at full potential, especially because they can run 32-bit, 384kHz sample rate (much above the resolving capability of the human ear and that of CD quality sound (16bit,44.1kHz) . It is worth the effort and small price tag. Don't let it's stature fool you, this thing is powerful and versatile. ... show more
Reviewed in the United States 🇺🇸 on April 15, 2020 by Sam Diamond

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