K11 DAC and Headphone Amplifier for Home Audio or PC, 6.35mm and Balanced 4.4mm, RCA, Coaxial, Optical, 1400mW, 384kHz/24Bit DSD256 (Black)

I wanted to get into higher end audio, namely by finding a desktop DAC with balanced audio output. For under $150, this was an incredibly sensible purchase for my needs. Unit itself is made of solid material, sleek black finish that isn't a total fingerprint magnet, with full size audio out as well as the aforementioned 4.4mm balanced out. My headphones ROAR out of that balanced out, even on low amplification! Love the aesthetics from the LED lighting on top, which I didn't even realize was a feature when I plugged it in! Pairs great with a room and setup full of RGB. If you want to get into upper mid to higher end audio, this is a fantastic starting point that'll run out of any desktop or laptop, or even game console with no drivers needed! Drivers are necessary for ASIO out on desktops though, which can be tricky to install. Overall though, great value and sound, these make your headphones even better.

The Dac/amp came in a very good shape, the box had a little damage from being open previously, but otherwise the device works well, sounds good, the build is extremely good, it has enough power for all of my headsets and I can't hear any distortion. The inputs and outputs are making it very versatile and it's easy to adjust.

The FiiO K11 punches way above its price and size. It delivers a clean, powerful sound with enough headroom to drive most headphones comfortably, especially through the balanced output. The tuning is neutral and detailed without being harsh, making it a great match for both planars and dynamics. Build quality feels solid and premium. The volume knob is smooth, the screen is bright, and the menu is simple to navigate. It stays cool during long sessions and doesn’t clutter the desk. USB connectivity is stable, and switching between inputs is quick. For everyday listening, gaming, or music production, the K11 offers excellent clarity and separation. You get high‑resolution support up to 384kHz/24‑bit and DSD256, which is more than enough for most libraries. If you want a compact desktop DAC/amp that delivers clean power, great usability, and impressive sound for the money, the K11 is an easy recommendation.

The FiiO K11 is a compact, feature-rich desktop DAC/amp that aims to deliver high-quality audio without breaking the bank. Positioned as an entry-level unit in FiiO’s lineup, it offers a sleek design, versatile connectivity, and enough power to drive most headphones—all for around $159. The sound is clean, detailed, and largely neutral—though not without quirks. While many users report a pleasant listening experience with no coloration, others have noted issues with the digital filters, describing the sound as “compressed” or “plastic” depending on the preset. Filter 4 is often cited as the most natural The FiiO K11 (non-R2R) is a solid entry-level DAC/amp that balances aesthetics, usability, and performance. It’s not a technical powerhouse, and audiophiles seeking absolute neutrality may find its sound signature lacking. However, for casual listeners and budding enthusiasts, it’s a fantastic starting point—especially if you value convenience and versatility. If you're looking for a clean desktop solution with balanced output and modern design, the K11 delivers. Just be aware of its quirks before diving in.

Definitely a nice little amp and love the fact that it has the balanced output. I'll keep it simple since I'm not into all the silly audiophile terminology. After watching a few videos I decided to pick this up it was pretty happy with it. I've had a few other amps previously and I have to say this one has some seriously heavy filtering. Never before have I been able to switch filters and hear such a difference between the sound. This one goes from Bright and sharp a filter number one to completely dark and muffled at filter number five. Filter six is basically bypass and it's where I kept mine at. It's a really good sound really nice vocals good Sound Stage and really overall a great value. I think the interface is really cool and the form factor is really nice the knob feels great the display looks cool, however the LEDs on top make me feel like it was geared towards gamers especially at that price point. Moving on to a couple comparisons. Versus the smsl c200 it's pretty close but I have to give the win to the smsl but it's nearly $70 more. The smsl just sounds a little more detailed you hear a lot more Reverb and symbols and acoustic guitar strums it's just more clear. Also the biggest thing is the Sound Stage is much bigger in the smsl. You feel much more like your standing in the center for performance and things feel a little bit wider around your head and a little more holographic. Comparing it to the topping dx3 Pro+ it's just a different game totally. The topping is much Superior than all the others. It's punchier it's much much more clear and you're hearing details that just disappear on the k11. The soundstage is bigger and distant reverbs on vocals or snare drums just feel like they're floating around the air in your head. It's really cool amp unfortunately it didn't have a balanced input so I couldn't do a direct comparison. Comparing them all through the quarter inch plug the topping blew everything out of the water however comparing the topping with the quarter inch versus fiio and smsl balanced, the topping was dead last. I don't know if my sundara's shipped with a poor cable but for $17 here on Amazon I bought a balanced cable that really changed the entire sound making it much more clear in detail. Anyway that's what I noticed. Either way I didn't end up keeping the fiio k11 just because I found a better option at a higher price that I just couldn't give up after hearing it. I think anybody would be very very happy to have this amp as was I before I made the mistake of listening to more expensive units :)

The FIIO K11 DAC & Amplifier is worth every penny. I use it paired with Beyerdynamic DT 990 PRO (250 Ohm) headphones and the TIDAL music streaming service. I have the K11's gain set to "high" to accommodate the impedance of the headphones and almost never need the volume above 40/100. The unit has six different digital filters. I use filter #4: Slow Roll-Off, Phase-Compensated which is indicated as appropriate for classical music. My feeling is, if it's good for classical music, it's good for any genre. The FIIO K11 sounds fantastic and works seamlessly with the Wavelet EQ app (Android). Highly recommended!

I bought this unit to replace the audio section on my PC's motherboard due to an instability problem with the hardware that could only be rectified through a cold reboot of the system. I did not buy this unit to improve sound quality. I only wanted to stop using the motherboard's onboard audio section. As an electrical engineer who has designed and built Class A amplifiers, I'm generally skeptical of the snake oil that is sold in the DAC market so I was honestly not expecting any improvement in audio quality here, but after I wired it up it took only a few seconds of listening to notice a significant increase in stereo separation / imaging, a much cleaner high end reminiscent of my class A amps, and a much lower noise floor. In short, this thing sounds fantastic and it's breathed new life into my audio collection. The volume control and display as well as the headphone jack on the front panel were not a requirement for me but they are certainly perks that are worth the slightly higher cost of this unit relative to the SMSL or other "faceless" units. One issue: I initially connected the USB-C port on the rear of the DAC to a USB-A port on my PC using a known-good cable. In this configuration my OS (Linux) refused to instantiate the USB interface and reported a power-related error. I found this strange because the unit is powered independently from an external AC/DC power brick and not the USB-C interface itself, but when I switched to a USB-C port on the PC (and hence a USB-C to USB-C cable) the interface came up and the device was recognized.

It works like a charm. No problems whatsoever with it. Sound is clear and looks are great. Before buying take some time to watch some videos and reviews cause there are some things about the configuration and the user interface you might miss, as the power off function for example (press the dial for a few seconds and it will go off) Happy with it :)

Le FIIO K11 est une vraie réussite ! Ce DAC/ampli offre un son clair, puissant et précis, avec une excellente dynamique. La prise en charge du DSD256 et du 384 kHz/24 bits permet de redécouvrir ses morceaux préférés avec un niveau de détail impressionnant. Les multiples sorties (6,35 mm, 4,4 mm, RCA, coaxial, optique) rendent ce petit boîtier ultra polyvalent, parfait pour un usage sur PC, Mac ou système audio domestique. La puissance de sortie est largement suffisante pour driver des casques exigeants. La finition noire est sobre et élégante, et la prise en main est simple, même pour les non-initiés. Rapport qualité-prix imbattable dans cette gamme ! Je recommande chaudement aux audiophiles comme aux utilisateurs en quête de meilleur son au bureau

I am running as a DAC/headphone amplifier for a Bluesound streamer via the optical connector. I have a pair of Audeze LCD-2 headphones which are tough to drive and for which I have upgraded to a 4.4mm balanced cable. The FIIO K11 drives the big Audezes with ease and the combination sounds great - detailed with clear, deep bass, clear midrange and nice high frequency definition without sounding shrill or sibilant. The menus are very easy to navigate - I migrated from a Chord Mojo2 which was a nightmare with all its coloured LEDs (it eventually died and I have not got round to getting it fixed yet). I am very happy with the FIIO K11 and would recommend it strongly. For the price it is an absolute steal!

Perfect for my hd560s

My Wiim Ultra had an iffy headphone output so I bypassed it with this puppy, using the USB port. My modest headphones sound better than ever! I am very happy with this unit as it also has optical and coax inputs, if needed. It has 3 settings for various types of headphones. The default "medium" setting works great with my headphones so I left it. But it can also work with headphones that need more juice, I guess. Anyway, I am a happy guy!

Excelente