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

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.

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 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!

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.

The FiiO K11 is an impressive DAC/amp, especially for the price. The power output is excellent, easily driving most headphones with plenty of headroom. Whether you’re using low-impedance IEMs or more demanding over-ears, it delivers clean, dynamic sound. I also appreciate the multiple input options—USB, optical, and coaxial—making it easy to integrate into different setups. The digital screen and lighting are nice touches, providing clear volume levels and settings as well as lighting to help match the aesthetics around it. The downsides are that the software to update the device may be confusing to others, and I occasionally receive a loud whine from the device while off. Unsure of what could cause this, as I ended up moving it away from all other cables/devices and it still persists. The EQ/crossover settings aren’t the greatest, but are tolerable. Still, for the performance and features, it’s a solid choice for anyone looking for a powerful, flexible DAC/amp.

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.

Was pleasantly surprised with this DAC/Amp combo. Bought on a whim to replace my broken JDS Labs Atom stack I had for the past 4 or so years and I think I prefer the sound of this. Sound quality and clarity is great. Connection was super simple. Only "downside" I could possibly see is that the power brick is fairly large, but I have it double sided taped to the bottom of my desk, so no issue for me. Also wish the volume control wheel could be incremented in values of 5 instead of 1, just to get to the level I want a bit quicker. If you are in the market for a budget friendly DAC/AMP, I highly recommend this.

Description is wrong, it's definitely not a 1400W Amp but it drives my sennheiser 620S well and sounds great. I hope the display doesn't burn in like my other fiio Amp. I have had my e18 for 8 years of heavy use and it still sounds great but the display has heavy burn in. Build quality is excellent, and I love that I don't have to turn it on and off all the time like I did my old schiit tube Amp that it replaced.