K11 Desktop 1400W Power Balanced Headphone DAC & Amplifier 384kHz/24Bit DSD256 for Home Audio/PC 6.35mm/4.4mm/RCA/Coaxial/Optical (Black)

These are absolutely spot on for audiophile quality conversion and reproduction. So good I bought two. Can't recommend them highly enough.

Good, high quality. Sound it more powerful and punchy. Doesn't take up too much room, good settings for the onboard RGB as well! Good weight, suitable for a desk. Good value for money and very easy to setup, albeit poor instructions.

Brilliant sound, at least will no longer suffer from shorter battery life from my Q3

Does what it says on the tin, great for my headphones and was easy to set up.

I like this amp as it has clear crisp audio with a decent balanced power output. Hard to find anything better for the price rn. Unfortunately there is some problems. Someone on here said you cant turn it off which is wrong you just have to hold the one button that is on it down for like 10 seconds but anyways my problem with this is that at certain frequencies the audio cuts out completely.(UPDATE BELOW) At first I noticed this problem on Tidal when playing certain songs and I just thought that it was tidal making this problem not the amp. For the first time today I experienced the audio cutting out whilst watching the movie dune on Netflix so it is the amp... I've tried different cables etc, its for sure the amp causing the issue. It does rarely happen when watching movies and is more common when listening to music but this is kinda unacceptable really... An amp that cuts out certain frequencies completely? Also the Fio website sucks, I tried to update my drivers for the amp and it literally doesn't work. Maybe for others who really want to go out of their way to get the update to work might be able to get it to work but it shouldn't be this f difficult. Also the windows volume bar doesn't work when plugging the amp in but idc. UPDATE. I figured out that this problem with the audio cutting out only happens when changing sample rate settings in the sound control panel for the amp. So the problem is when playing at a sample rate of 352800 khz and above. When using the 192k sample rate and below I haven't run into any problems yet but I'm not going to lie this is still unacceptable. Obviously people are going to want to run this thing at its full potential but this isn't possible without problems unfortunately so buy this if you're happy with 192khz sampling rate, don't expect the 384khz to fully work as it just cuts out sometimes. Hella annoying that nobody else has shared this info online so far I'm literally the only one aware of this that has posted this info so you're welcome Fio you useless donuts

Before forming your opinion, change the default digital filter from 3 to 6. Where 6 is no oversampling and has less harshness compared to 3 which made sibilance more noticeable. Some have stated filters 1 or 2 are also better sounding but 3 is the worst for me. Power, resolution and features are great for the price. I had been using Chord Mojo (1st iteration) fed by HiBy R5 and Sennheiser HD560s, but the Mojo is bettered by this. Not yet tried the balanced output. Small, stylish and easy to operate. Must run off mains power with supplied adapter but I prefer this.

I got the K11. Had problems getting my windows 11 box to see it. It would see it for a second, then say it was disconnected. Fixed by rebooting windows I upgraded the fw from 1.05 to 1.14, had to rename the folder to take out chinese characters, else it simply exited when I loaded fw hex file. It sounds much better than the K3, to me, more detail, more everything, tracks that sounded really good on K3+HD599 sound even better on the K11. Money well spent. Look online for reviews, not amazon, you'll see that they are glowing

This is great, I've been trying a few different amps and dac combos in the price range of £100 ish and this is what I landed on in the end. I don't think you can actually beat this for £120, the sound signature is very neutral and doesn't seem to colour your sound at all which is ideal if you've got headphones with strong signatures. I have flat magnet HE400se headphones that I EQ with software and they sound incredibly smooth and clear through this. Make sure you update the firmware properly if you use it on Pc.

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!

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.