Name: FiiO K17 | Desktop DAC and Amp
Brand: FiiO
SKU: FIO-K17-SLV
Price: 949.99 USD
Availability: InStock

FiiO K17 DAC and amp in silver front left 3 quarter angle whitebox

FiiO K17 DAC and amp in silver front center eye level whitebox

FiiO K17 DAC and amp in silver back center eye level whitebox

FiiO K17 DAC and amp in black front left 3 quarter angle whitebox

FiiO K17 DAC and amp in black back center eye level whitebox

FiiO K17 DAC and amp in silver front interface closeup left 3 quarter angle

$949.99

Color

Silver

Black

Featuring Dual AKM AK4499EX DAC Chips, the K17 Offers the Perfect Combination of Modern Design and Advanced Audio Technology

Discrete Class AB headphone amplifier
High-power 4000mW+4000mW balanced output
Features flagship AKM DAC chipset
Custom low-noise power supply with separate analog and digital circuits
Three ultra-low phase noise femtosecond crystal oscillators
3.93-inch Touchscreen for effortless control
Check out our FiiO 2025 Buyer's Guide here!

New Frontiers of Modern Technology

As a next generation desktop headphone amplifier, the FiiO K17 is where elegance and cutting-edge technology meet. The K17 is built for audiophiles who demand clean power, low noise and versatile connectivity. The discrete Class AB circuit, dual AKM flagship DACs and 4000mW + 4000mW output make this amplifier stand at the top of its game. The K17 is not only the successor to the K9 Pro, it is also an exploration of new possibilities for high-end desktop DAC and headphone amplifiers.

Exceptional Components

The K17 features an M21586Q DSP chip, capable of double-precision 64-bit floating-point calculations and runs at a high 360MHz clock frequency. The chip is complemented by a ES9821Q ADC and a specially customized ultra-low phase noise femtosecond crystal oscillator. These three components allow the user to utilize the 31-band high-precision lossless PEQ.

Discrete Class AB Amplification

The K17 is built with a fully-discrete Class AB transistor current amplification headphone amplifier. Using ON Semiconductor MJE243/253 transistors, this design delivers high current with low output impedance. The result is 4000mW+4000mW of balanced output, enabling it to drive a wide range of headphones.

Fully Balanced

From the DAC to the I/V conversion, low-pass filtering, and headphone amp, the entire audio circuit features a fully differential architecture. This design enhances dynamic range and minimizes crosstalk. Key stages, including I/V conversion and LPF, utilize multiple low-noise OPA1612 precision op-amps for a powerful, detailed sound.

FiiO K17 DAC and amp fully balanced DAC circuit diagram

AKM Flagship DACs

The K17 holds an AKM flagship DAC chipset—AK4191+AK4499EX (x2). Each channel is handled by an AK4499EX. The 8-channel to 4-channel LPF design reduces common mode interference, resulting in better channel separation and dynamics. The design also incorporates AKM’s "DWA ROUTING" technology, ensuring a clean background and detailed sound reproduction.

Multi-Stage Power Supply

The K17’s analog circuitry is powered by a multi-stage supply, featuring dedicated control circuits for each signal path stage. Low-noise TPA7A47/7A33 LDO regulators provide secondary voltage regulation, ensuring stable, clean power for pristine audio performance.

Low-Phase Noise Femtosecond Crystal Oscillators

The K17 features three top-tier ACCUSILICON ultra-low phase noise femtosecond crystal oscillators—AS318-L (45.1584MHz, 49.1520MHz) and AS318-Pro (24.576MHz). These minimize phase noise, ensuring precise signal restoration across various sampling rates for purer, more consistent sound.

Dual-Core Design

The K17 is driven by a high-performance X2000 multi-core processor—with a primary XBurst@2 core, two logical CPUs, and an XBurst@ small core—for precise audio processing and stable playback with minimal energy use. It also features a low-power ESP32-S3 SoC with an Xtensa 32-bit LX7 dual-core (up to 240MHz) and an ultra-low power co-processor, ensuring a fast, responsive, and energy-efficient experience.

FiiO K17 DAC and amp dual-core design diagram

Additional Features

Physically Separated Boards
The internal power supply, digital, and analog sections are each housed on separate circuit boards to prevent interference. This design preserves signal accuracy and integrity, delivering purer, cleaner audio output.

Low-Noise Power Supply
Powering the K17 is a custom high-quality low-noise transformer, ensuring the purity of the power supplied. Additionally, five 4700uF electrolytic capacitors provide ample power reserves to ensure a steady supply of power.

Wire and Wireless
With Gigabit Ethernet and 2.4G/5G Wi-Fi, the K17 offers fast, stable network connectivity, allowing you to stream lossless audio seamlessly, without dropouts or interruptions.

Specifications

Display: 3.93-inch LCD (240×1020) bezel-less screen
DAC: AK4191EX + AK4499EQ (2x)
USB Decoding: XU316
Bluetooth Decoding: QCC5125
Amplifier: MJE243G/253G discrete transistor current amplification
MCU: ESP32-S3
SoC: X2000
Dimensions: 24.46 x 21.3 x 6.68 cm
Weight: 6lbs

Full list of specifications

FiiO K17 DAC & headphone amplifier
AC power cord
Remote control
XLR4 plug cover
Fuse
USB data cables (x2)
Headphone plug adapter
Warranty card
Quick start guide

[{"id":41309638557771,"title":"Silver","option1":"Silver","option2":null,"option3":null,"sku":"FIO-K17-SLV","requires_shipping":true,"taxable":true,"featured_image":{"id":32581652742219,"product_id":7302943866955,"position":1,"created_at":"2025-02-28T11:49:09-05:00","updated_at":"2025-02-28T11:53:06-05:00","alt":"FiiO K17 DAC and amp in silver front left 3 quarter angle whitebox","width":2048,"height":2048,"src":"\/\/bloomaudio.com\/cdn\/shop\/files\/fiio-k17-slv-thumb.webp?v=1740761586","variant_ids":[41309638557771]},"available":true,"name":"FiiO K17 | Desktop DAC and Amp - Silver","public_title":"Silver","options":["Silver"],"price":94999,"weight":2722,"compare_at_price":null,"inventory_management":"shopify","barcode":"6953175710813","featured_media":{"alt":"FiiO K17 DAC and amp in silver front left 3 quarter angle whitebox","id":24348121497675,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/bloomaudio.com\/cdn\/shop\/files\/fiio-k17-slv-thumb.webp?v=1740761586"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":41309638525003,"title":"Black","option1":"Black","option2":null,"option3":null,"sku":"FIO-K17-BLK","requires_shipping":true,"taxable":true,"featured_image":{"id":32581652774987,"product_id":7302943866955,"position":4,"created_at":"2025-02-28T11:49:08-05:00","updated_at":"2025-02-28T11:53:06-05:00","alt":"FiiO K17 DAC and amp in black front left 3 quarter angle whitebox","width":2048,"height":2048,"src":"\/\/bloomaudio.com\/cdn\/shop\/files\/fiio-k17-blk-thumb-two.webp?v=1740761586","variant_ids":[41309638525003]},"available":true,"name":"FiiO K17 | Desktop DAC and Amp - Black","public_title":"Black","options":["Black"],"price":94999,"weight":2722,"compare_at_price":null,"inventory_management":"shopify","barcode":"6953175710820","featured_media":{"alt":"FiiO K17 DAC and amp in black front left 3 quarter angle whitebox","id":24348121366603,"position":4,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/bloomaudio.com\/cdn\/shop\/files\/fiio-k17-blk-thumb-two.webp?v=1740761586"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

FiiO K17

I’d say more 4.5 stars…

There are not many issues I have with the K17. I’m a veteran Roon user which made the “Roon Ready” a considerable selling point for me. I have had some quirky experiences with the streaming input though. Not so much that the feature becomes unusable, just has some hiccups. For instance, I have experienced intermittent connectivity issues with Roon resulting in the internal streamer not appearing to Roon on my network. This resolves itself pretty quickly with a quick shut down and flip of the power switch on the back. This is an issue I imagine a future firmware update will fix. I see from another review on Amazon that the writer experienced similar issues with Roon even after updating to the current firmware (as of 4-11-25). I figured I’ll just skip the FW updates until I know a fix is there. I am okay with having to quickly reboot to get back on the network. If I really get annoyed, I’ll just connect my network streamer or a Roon Ready DAP to my K17. It’s an additional product and cable I have to use, but I think it worth it simply for the DAC/Amp (more to come…). But this leads to my other pet peeve about ease of use…

The K17 doesn’t support OTA updates. While this is such a minor issue, and I hate to be a Karen, it’s worth pointing out. Actually it’s a headache… but whatevs (first world problems, I guess?). I’m totally okay with having to download a file to my computer, transfer the file to a flash drive stick, and plug it in to the back of the K17 to do a local update. And then have to do this 2 more times for other updates. It’s annoying. And I think some people might find it technically challenging. I hope the K17 eventually will be able to function using the FiiO Control app and allow OTA updates.

I’ve said a lot about what I don’t like. But I just like to get the bad out of the way. The great things about the K17 far outweigh the quirky. I bought this DAC/AMP because it uses a similar flagship DAC-set to the Astell&Kern SP3000 series. While not identical (the SP3000 has separate DAC-sets for the unbalanced and balanced outputs). The amp is powerful, easily driving several of my cans and able to drive my high-sensitivity IEMs with no noise. My go-to cans are Focal Utopias and Focal Stellias. IEM used so far is my Campfire Supermoon custom. Having mentioned the SP3000, I have not used it. I own the SP2000. I note the SP3000 because of its universal acclaim for sound quality. I cannot say the K17 represents the sound of the AK SP3000, I just point out the similar innards.

Quickly. The sound quality is sublime. I had put my Utopias aside for several months due to boredom, gravitating toward my IEMs with a DAP or Mojo 2. When I first hooked the Utopias up to the K17 I was immediately moved by the sound produced. I won’t describe it. But I am in love with a desktop set-up again. This sounds better than my Chord Hugo 2. Further it is made better by the native, if buggy, streamer for Roon and AirPlay. The sound quality with my Supermoons is great too, but not as exponentially great from my portables. My SP2000 has finally stopped waking up or charging, so I’ve been using a FiiO M15S for my portable listening since FiiO DAPs are all Roon Ready.

This is pricey for many people, however it is a high-value product for what it features. Even though quirky, it’s one of the only Roon Ready DAC/AMPs you’ll easily find - and it’s certainly the only Roon Ready DAC/AMP you’ll find for under $1k that sounds this good… or that has these specs.

I’d suggest considering it now should it’s price rise due to tariffs. It’s worth the current price, in my opinion.

FiiO K17 | Desktop DAC and Amp