Items Included
- FiiO K11 Desktop USB DAC and Headphone Amplifier (Silver)
- USB-A to USB-C Cable
- Power Adapter
- Power Cable
- 1/4″ Headphone Adapter
- Limited 1-Year Manufacturer Warranty
Key Features
- For Computers, Phones, Music Players
- High-Resolution CS43198 DAC
- SA9312L USB Controller
- Supports 384 kHz / 32-Bit / DSD256
- Coaxial/Optical Inputs
- 1440mW Headphone Amplifier
- RCA Line Outputs
- Low-, Medium-, High-Gain Levels
- RGB LED Indicator
- External Power Supply with AC Adapter
Aimed at audiophiles and music enthusiasts, the high-fidelity FiiO K11, styled in silver, is a compact desktop USB DAC and headphone amplifier designed to faithfully reproduce your music when listening to audio from your computer, smartphone/tablet, or other digital music player. The K11 employs the high-resolution CS43198 DAC to deliver rich audio details and a superior performance up to a 384 kHz sampling rate and native DSD256.
Equipped with optical and coaxial digital inputs, a USB-C port, RCA analog line outputs, and two headphone jacks (1/4″ unbalanced and 4.4mm balanced), the K11 acts as a bridge between your computer, phone, speakers, and headphones, allowing them to work together seamlessly. Switchable low, medium, and high gain levels are available, enabling you to use the amplifier at comfortable volume levels with almost any headphones.
Wide Variety of Inputs and Outputs
- USB (USB connection to phones for decoding does not consume the phones battery)
- Optical input
- Coaxial input and output (Coaxial share same physical connector. Coaxial output can only be used in USB Mode)
1400mW Power Output
Under a 32-ohm load, the K11 is capable of pushing 1400mW under balance modes. This allows it to easily drive many hi-fi earphones and headphones to fully unlock their potential.
Gain Levels and Volume Curves
The K11 has three separate gain levels, each with its own volume curve. This provides a better listening experience with various types of headphones, whether you are using sensitive earphones or hard-to-drive over-ear headphones.
Specially-Designed Audio Circuit and Power Supply
Within the K11’s slim build lies a special audio circuit designed for great sound quality. This is backed by more than 16 low-noise LDOs for precise voltage stabilization and powered by an external 12V switching power supply. All of this leads to a purer and more robust supply of power, leading to stable high-quality audio and truly enjoyable music, all of the time.
Slim and Stable Enclosure
The slim aluminum alloy body allows you to easily place the K11 anywhere, making it easier to complement the rest of your desk. Thanks to the silicone antislip pad, the K11 rests stably and firmly on your table.
High-Contrast Display
A custom, high-contrast display and durable VA display allows you to easily see the sampling rate, volume, gain, or output mode with just a glance.
Adjustable RGB Logo Lighting
FiiO logo is illuminated with RGB lighting, giving you a quick way to identify the sampling rate of the current audio being played back. Six LED strips work in conjunction with a carefully placed reflective film and parts of the body designed to reflect light to make the light show uniform and elegant.
Single Knob Interface
- In the K11’s minimalist design, the volume knob acts as a crucial source of total control. The K11’s multifunction volume knob is used to power the device on and off, accessing menu operations, making volume adjustment, and other functions.
- The knob is designed so that you can quickly execute various complex actions by simply pressing and turning the knob. You can also quickly switch between LO/PO modes by double-pressing the knob, making it easier for you to appropriately connect to different headphones or audio setups.
Driver-Free Mode
The K11 used in USB DAC mode does not require a driver on Widows 10 and above and can also be used with video game consoles such as PS5 and the Switch. Simply plug and play for worry-free usage, whether you are enjoying music or being immersed in games.
| Number of Headphone Channels | |
| Recommended Headphone Impedance | |
| Headphone Output Power | |
| Analog Audio I/O | |
| Digital Audio I/O | |
| USB I/O | |
| Wireless | |
| Frequency Response | |
| Power Requirements |
| Number of Headphone Channels | |
| Recommended Headphone Impedance | |
| Headphone Output Power | |
| Digital Chipset | |
| Analog Circuitry | |
| EQ | |
| Display |
Connectivity
| Analog Audio I/O | |
| Digital Audio I/O | |
| USB I/O | |
| Wireless |
Performance
| Frequency Response | |
| Maximum Output Level | |
| Impedance | |
| THD+N | |
| SNR | |
| Noise | |
| Crosstalk |
Digital Audio
| Sample Rates | |
| Bit Depths |
Compatibility
| OS Compatibility | |
| OS Compatibility | |
| Mobile App Compatible | |
| Mobile Device Compatibility |
Power
| Power Requirements | |
| AC/DC Power Adapter |
Physical
| Dimensions | |
| Weight |
Packaging Info
| Package Weight | |
| Box Dimensions (LxWxH) |
Evan –
Bought to replace an older, cheaper DAC/AMP I’d gotten for around $40. The K11 works wonderfully for all the headphones I’ve got (Takstar Pro 82, Hifiman HE4xx, Phillips SHP 9500S mainly), and has a wide array of features as well. Getting to updating the firmware is a must however, as there are some quirks that the K11 has on its stock firmware that disrupt the listening experience. Thankfully firmware updates aren’t terribly painful, though it took some digging to find proper instructions. Once that was settled, it worked beautifully though! Great looking, well-functioning buy for those who are looking around this price point.
Evan –
Eric –
Having read reviews about sound delay or what not and needing a firmware update, I decided to get the K11 anyways. I had downloaded the latest firmware and had it ready to update when my unit arrived but to my surprise, it already had FW version 122 installed. All I had to do was plug it in and enjoy. No issues so far. I have the ifi Zen Dac V1 and will still use it whenever I want more bass in my music and the K11 for when I want a more neutral / analytical sound. Both are great! Headphones/IEMs I use are SHP9500, 58x, ATH-WS1100, Fidelio X2HR, Kato, Zero 2, Aria. Pretty good dac/amp for the price.
Eric –
Paul –
I purchased this item for line-in to the Denon Heos Speaker. The connection works (3.5mm). However, many songs the speaker distorts. Obviously, this could be internal to the speaker as well. However, this amp sends less power to the unbalanced headphone amp than to the balanced connection. I missed that in the specs. Quality of the amp and options is nice. Just not quite powerful enough for my application.
Paul –
Elean –
I recently got this because I was getting a little bit of interference while using my motherboard’s audio interface, this got rid of the issue entirely and the sound is great 😊
Elean –
Zach –
Big upgrade from using motherboard sound card. Quality is better, but it also got rid of a weird noise I’d hear through my headphones when my CPU was under load. It’s also nice I can move it to a good position on my desk to accommodate my headphone cable (vs. the cable stretching to reach the headphone jack on my speakers).
Zach –