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Availability:
Only 2 left in stock, order soon!
Arrives
Friday, Nov 13
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At a glance
- Condition
- New
- Model
- K11
- Material
- Aluminum Alloy
- Maximum Supply Voltage
- 12 volts
- Mounting Type
- Cable Mount
- Output Power
- 1300 Milliwatts
- Maximum Output Power
- 2.6W
- In the box
- USB Type C to USB Type A
- Warranty
- 1 year
Features 6
- Fully-Differential 24-Bit R2R DAC Array - FiiO has featured its newly developed four-channel fully differential 24-bit R2R resistor array on the K11 R2R. It consists of 48 resistors per channel, a total of 192 high-precision ultra-thin film resistors with 0.1% accuracy and low-temperature drift between the four channels. It promises clean and crisp output with dark background thanks to the specially developed audio circuit architecture.
- NOS/OS Dual Operating Modes - FiiO K11 R2R has NOS(Non-Oversampling) and OS(Oversampling) dual operating modes. These are freely switchable and offer dual sound characteristics with the device. The NOS mode maintains the original sampling rate while signal processing while the OS mode oversamples all the signals to 384kHz for processing. NOS mode results in more musical presentation while the OS mode delivers more details and clarity.
- Powerful Amp Section - FiiO has equipped the K11 R2R with professionally designed amp circuitry. It consists of Ti OPA1642 as Low-Pass filters and then dual SGM8262 Professional-grade operational amplifiers. The K11 R2R has an output power rating of up to 1300mWx2, which is adequate enough to drive demanding headphones with ease. It has three-level gain modes for easy pairing with sensitive as well as high-power requiring gear. The K11 R2R also adopts NJW1195A precise digital volume chipset for precise volume adjustment with low distortion between the channels.
- Dual Headphone Output Ports - FiiO K11 R2R houses dual headphone output ports. It consists of a single-ended 6.35mm port and a balanced 4.4mm output port. You can easily pair different IEMs and headphones with the K11 R2R and enjoy high-resolution music to all its glory.
- True High-Resolution Audio Signal Processing - FiiO K11 R2R supports decoding for high-resolution audio signals. It has full support for PCM and DSD signal processing supporting up to 32-bit/384kHz PCM and DSD256 audio signals. DSD256 requires the DSD output mode to be set to native. It is internally converted into PCM for R2R signal processing.
- Professionally Designed Low-Noise Power Supply - FiiO K11 R2R features a professionally designed low-noise power supply. It consists of 17 Low-Noise LDO precision voltage regulator ICs and 2 DC-DCs providing a multi-channel power supply. It further benefits from the external 12V power supply ensuring a clean output with low noise and distortion issues. K11 R2R delivers quality sound for its users.
Specs 14
| Manufacturer | FiiO |
|---|---|
| Maximum Supply Voltage | 12 volts |
| Minimum Supply Voltage | 12 volts |
| Mounting Type | Cable Mount |
| Brand | FiiO |
| Number of Channels | 4 |
| Output Power | 1300 Milliwatts |
| Maximum Output Power | 2.6W |
| Material Type | Aluminum Alloy |
| Model | K11 |
| Brand Name | FiiO |
| Number of Items | 1 |
| Global Trade Identification Number | 21 |
| Part Number | K11 |
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Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Nov 13
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Huge Value in an R-2R DAC — and When to Use Oversampling vs NOS
Color: Black
I’ve been running the FiiO K11 R2R for a while now, and it’s an incredible way to step into ladder DACs without spending a fortune. Build quality is solid, the display is clear, and it’s truly plug-and-play. Unlike the standard K11, which uses a delta-sigma DAC chip, this version employs a true R-2R resistor ladder to convert digital to analog (No DAC chip). The R2R architecture gives music an organic, textured feel, and makes its OS/NOS switch worth exploring. Here’s how the two modes behave: •Oversampling (OS) is my default. It keeps rock, classical, and movie scores lively and punchy, with tight bass and precise imaging. •Non-Oversampling (NOS) softens edges and smooths the top end — great for older masters like Silver Springs from Fleetwood Mac, bright recordings, or late-night listening sessions. Switching is instant, so you can tailor playback to the recording. My listening chain is: Bluesound Node (coax out) → K11 R2R DAC → Denon AVR-X4500H (analog in) → Emotiva BasX amp → ELAC Debut 2.0 F5.2 towers + dual REL T/1003 10″ sealed subs. I run the AVR in Stereo mode while bypassing Audyssey EQ on the mains — this gives me the transparency of Pure Direct while keeping my subs engaged. Using the Audyssey MultEQ-X PC app, I let it measure the F5.2s’ natural roll-off and it automatically set their crossovers around 40 Hz. I also keep the AVR’s bass management set to LFE + Main, which blends the RELs smoothly with the towers instead of letting the subs “bloom” separately. The result is bass that feels integrated rather than overblown. Price-wise, the K11 R2R is unbeatable. Many R-2R DACs run for about $1,000 or more, but this one is roughly $175. The high-end models may squeeze out another 30–50 % of refinement, yet they’re not 5–6× better — for most setups, that premium price tag just isn’t justified. If you’re curious about R-2R sound and want a DAC that punches way above its price, the K11 R2R is an easy recommendation. In addition, this DAC has made my Sennheiser HD650XX headphones come alive for the first time ever! This DAC is a no-brainer upgrade IMHO, however, based on the reviews you may want to buy the additional extended warranty as this product only comes with a one year warranty. Thank you for reading this and I hope it was helpful!!
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Reviewed in the United States on August 9, 2025 by Paul
Ideal match for Hifiman headphones
Color: Black
Fiio K11 R2R in non-oversampling mode pairs beautifully with my Hifiman Ananda Stealth. Deep insight and nuance, especially in midrange. Vocals are particularly rich. Ananda's hot treble is tamed but detail remains. Bass is full and resonant but less tight, but maybe that's actually more accurate. Everything just seems more "there". Smooth. By contrast, the oversampling mode (OS) has a more precise and organized presentation, but sounds a bit managed with everything relegated to its separate place, as opposed to NOS where instruments and vocals seem to pleasantly interact and blend, while remaining distinct. Each have their own strengths, though I prefer NOS. Admittedly the treble detail it lessened and the bass is looser, but vocals reveal fascinating depth and personality. Previous dac was KA15 dongle, which was very good and offered a 10 band eq plus filter options to play with. But with the K11 R2R I don't feel the need for any adjustments. Kinda perfect as is. I guess there's a reason that Hifiman's own dacs are all R2R. I also own dt770 pro, Grado 325x and Philips Fidelio 3. All are good with the K11 R2R, but the Anandas really shine. Highly recommended.
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Reviewed in the United States on July 18, 2026 by Amazon Customer
Great sound staging and clarity for a DAC in this price range
Color: Black
There are a wide range of opinions out there about the sound quality of this DAC. I'm firmly in the "sounds excellent" camp, for DACs in this price range. Remember - this is an entry level DAC, not $5000 R2R DAC. It should be compared to other DACs in its price range, not to R2R DACs in general. That said, it has plenty of "R2R-ness" in how it sounds. The sound staging is excellent, about as good as you can get with headphones. The accuracy and precision is high enough that crappy recordings are nearly unbearable to listen to, as they should be. I played in orchestras and big bands and I'm always listening for inner parts - that third horn bit in this piece or the bass trombone part - and that's all there. I've gone back and forth on NOS versus oversampling, and find that just like on every other DAC I have, it depends which sounds best from album to album. I'm running it with a wifi Raspberry Pi supplying signal via USB. I have noticed that choosing the right sensitivity for the headphones used matters a LOT in sound quality, and I listen through everything from custom in-ears through some really nasty and hard to drive planar headphones. This DAC doesn't do a wonderful job on the two hardest to drive headphones, but is perfect for everything else as long as I pay attention to selecting the right sensitivity. But that means that each time I use a different headphone, I have to deal with that single knob interface. I find the single knob interface to be annoying and fussy like every other similar implementation out there... would a couple of selector buttons really kill the value proposition??? Overall, happy with performance, sound quality. Fun to listen through. You'd be hard pressed to match the sound quality anywhere near this price
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Reviewed in the United States on April 19, 2025 by Oddly Opinionated
Converts D to A bigly
Color: Black
This replaced a Schiit modi 3 in my office setup. I got it mostly for ergonomic reasons. it was useful to have a headphone amp and the DAC in the same place. I got this particular DAC/amp combo because I wanted to try an R2R to see if I could hear the difference. Spoiler alert... I can't. Actually I can hear a difference between NOS and OS mode, but I really can't hear the difference between OS mode and the Modi that it replaced. I like the OS mode better. One thing I miss about the Modi is that you could change the input with a switch on the front of the unit. With a K11 R2R you have to mess around with pushing the knob and then turning to go through several menus. The balanced headphone output is better than the single-ended. I'm not actually of the belief that balanced is better or necessary for at home use, but maybe this particular single ended output kind of sucks? I used the line out to feed several other headphone amps with single ended outputs. All were better than the single ended output of this amp, but the balance output sounds just as good. A balance output is usually double the power of a single ended output. With the K11 R2R the single added power output is quite a bit less than half the balance output. There might be something to the fact that in this case the balance output is something more than just a doubling of the single ended output. My conclusion here would be that if you're going to use the balance headphone output and/or the line out to feed other things, it's great. If you are going to use mostly the unbalanced headphone amp, you could do just as well with something significantly cheaper.
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Reviewed in the United States on October 31, 2025 by CoffeeSnob
Perfect for a music lover, entry-level audophile
Color: Black
I am not a seasoned audiophile for the only reason that I don't want to spend thousands of dollars in equipment that I may not have the time to enjoy at its best so I just wanted a simple yet robust headphone amplifier that served as a good way to enjoy my music collection as it was meant to be. As part of my research journey I ended up keeping two headphone sets because they work simultaneously allowing me to switch "flavors" at any time without having to pause-unplug-plug-play. I'm currently not driving any desktop speakers but I'm confident that this unit will do the task without much strain. I'm very happy with this purchase.
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Reviewed in the United States on October 6, 2026 by SantoMB
Perfectly clean and warm sounding DAC
Color: Black
I want to preface this by saying that I'm not an audiophile. I've been told I have a tin ear and since I'm in my 50's and I wasn't always smart about my listening habits, I don't hear as well as I could. All that being said, this DAC is amazing! I've listened to songs on it that I've listened to for the last 40 years... and heard things in those songs I've never heard before when listening to them. It's a revelation. I can hear the musicians breathing sometimes as they play in a quiet studio. I can hear the sound of fingers actually hitting the keys on the piano, not just the hammer in the piano hitting the string. I've heard the foot pedal being pressed on the piano in the same piece of music. Just incredible. I use the Epos H6pro (closed) headphones with this DAC and they work perfectly. It can drive them harder and louder than I can comfortably listen to if I turn the volume up. This is one heck of an upgrade over the integrated sound built into my computer's motherboard.
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Reviewed in the United States on October 1, 2026 by Britt
Half decent little Dac
Color: Black
My biggest issue with the K11 is the navigating portion of it. I found it to be an annoying pressing the knob for a second or two or more, to get from one screen to another, while trying to use a particular function. The display is small, but what do you expect for such a compact size Dac. The lit up logo ontop, serves no audible benefit. The sound is ok, but not to my taste. I did like the overall finish of the aluminum chassis. I had higher hopes, based on review submissions. I do hear it does really benefits from a linear power supply, bumping up it's improved sound quality. As is though, it didn’t provide any performance improvements from my currently Dac. Therefore, I’m returning the K11. I’d rather have a Dac only, with no pre-amp, no headphone section. Time look at some Geshelli Dac’s.
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Reviewed in the United States on February 27, 2026 by Amazon Customer
Amazing DAC, for a noob like me
Color: Black
I'm not an audiophile at all whatsoever, so this is a genuine review from using it that past couple days. I bought specifically to pair it with my new Beyerdynamic DT 770 Pro headphones that I got recently. I bought these mainly for gaming, and music. Before receiving this DAC, I was using the headphones straight through my motherboard on my pc, which is a GIGABYTE B850 AORUS Elite WIFI7. The sound/volume was very, very low. But I could notice the difference in audio quality right away, compared to my Sony 3D Pulse headset that I used for 5+ years. I had the volume on my pc set to 100%, yet the output on the Beyerdynamic headphones was too low for my liking. And yes I know a motherboard usually won't be able to drive a pair of headphones like these, but I was doing it anyways while I waited for this DAC to be delivered to me. After setting up the DAC and using my DT 770 Pro headphones with it, the improvement in audio quality and the loudness is day and night. I'm very happy with the DAC. Not inly does my gaming audio sound much more clearer and great, but so does the music. I have no idea what the other settings really do, but it's serving it's purpose perfectly for me. For someone who knows nothing about these kinds of things, I'm more than happy with the purchase. Of course you can also use different softwares on your pc to apply, create, or adjust different EQs and tune the sound profile to your liking, just as I did. I do not regret this purchase at all. Not only will I use it for my DT 770 Pro headphones but I'll also use it for my Harmon Kardon Onyx Studio 7 speaker and any other devices in the future.
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Reviewed in the United States on July 1, 2026 by J