FiiO K17 Review: Compact All-in-One Audio Powerhouse?

The FiiO K17 is a compact audio powerhouse that defies expectations. This surprisingly small device packs a punch, functioning as a streamer, DAC, headphone amplifier, and preamp all in one sleek, vintage-inspired package. Initial impressions are overwhelmingly positive, with its miniature size and attractive design a welcome change from larger, more cumbersome hi-fi components. Despite its compact form, the K17 boasts a wealth of features and impressive audio performance, making it a truly versatile and intriguing option for audiophiles on a budget.This review dives deep into the K17's capabilities, exploring its remarkable sound quality driven by AK4499 and AK4191 DAC chips and a dynamic Class AB amplifier. We compare its performance against higher-priced competitors like the FiiO K19 and K9 Pro ESS, as well as the Bifrost 2 DAC, highlighting both its strengths and weaknesses. Discover whether the K17's limited streaming options and minor usability quirks outweigh its exceptional audio performance and versatile feature set. Find out if this miniature marvel truly earns its title as an all-in-one audio powerhouse.

Pros And Cons

Fio K17
  • Does everything except amplify speakers (streamer, DAC, headphone amp, preamp)
  • Great looks, customizable lighting
  • Physical and touchscreen controls
  • Powerful headphone amp (4W into 32 ohm)
  • Uses AK4499 and AK4191 DAC chips
  • More traditional class AB amplifier (unlike the THX amp in K19)
  • Natural and engaging sound
  • Better sound quality than K19 and K9 Pro ESS
  • Superior sound to XDO TA32's stock Rome DAC
  • Sonically as good or better than similarly priced competitors
  • Includes powerful DSP-based EQ function with app control and real-time analysis
  • Good three-dimensionality and layering in soundstage
  • Smaller than expected based on marketing photos
  • Poor contrast on silver version's gain and output selector labels
  • Limited streaming capabilities (Roon and AirPlay only, no Tidal Connect, Spotify Connect, etc.)
  • Streamer circuit disappears when switching inputs
  • USB input is switched off when using other modes

Read more: Fiio K11 R2R DAC/Amp Review: A Worthy Upgrade or Redundant Luxury?

First Impressions: A Miniature Marvel

Unboxing the FiiO K17, my initial reaction was one of surprise. Its compact size was a pleasant departure from the bulky hi-fi components I usually encounter. The design is undeniably sleek and attractive, almost miniature in its proportions, defying expectations.

Initial reaction to the FiiO K17's size.
Initial reaction to the FiiO K17's size.

Despite its small stature, the K17 manages to retain a vintage hi-fi aesthetic, giving it a distinct charm. This miniature powerhouse promises a level of functionality that belies its size, making it an intriguing prospect.

Feature-Packed Functionality

The K17 boasts an impressive array of features for its price point. Acting as a streamer, DAC, headphone amplifier, and preamp, it's a versatile all-in-one solution. The customizable lighting adds a touch of personalization, and physical controls offer convenient adjustments.

Close-up of the FiiO K17's physical controls.
Close-up of the FiiO K17's physical controls.

It seamlessly integrates both physical buttons and a touchscreen interface. This balance of control methods caters to various user preferences, optimizing usability despite the device's compact form factor.

Sound Quality and Performance

The K17's audio performance is truly remarkable. The sound is natural and engaging, surpassing many other devices in its price range. It utilizes the AK4499 and AK4191 DAC chips, a combination known for producing exceptional audio quality.

The reviewer is impressed with the sound quality.
The reviewer is impressed with the sound quality.

A departure from FiiO's previous THX amplification, the K17 employs a more traditional Class AB amplifier. This change results in a more dynamic and energetic sound, addressing a common criticism of FiiO's earlier models.

Comparisons with Competitors

Compared to the more expensive FiiO K19 and the K9 Pro ESS, the K17 offers a significant improvement in sound quality and dynamism. It also outperforms the XDO TA32 (with its stock DAC) in terms of soundstage focus and overall engagement, although the TA32's modular design offers potential for upgrades.

Comparison between the FiiO K17 and the XDO TA32.
Comparison between the FiiO K17 and the XDO TA32.

A direct comparison with the popular Bifrost 2 DAC reveals subtle differences. The Bifrost 2 is smoother, while the K17 offers more detail and resolution. However, the Bifrost 2 provides better three-dimensionality and soundstage depth, while the K17 provides a livelier, more energetic sound.

Minor Drawbacks and User Experience

The K17's limited streaming capabilities (only Roon and AirPlay) are a noticeable drawback. The streamer circuit's behavior when switching inputs is also inconvenient, requiring manual input selection to resume streaming.

The inconsistent labeling on the silver model, combined with the need for manual input selection, are minor annoyances that impact the user experience. However, these are offset by the device's overall strengths.

Conclusion: A Winning Combination

Despite minor flaws, the FiiO K17's exceptional sound quality and feature set at an affordable price make it a compelling option. It outperforms similarly priced competitors, including the SMSL SU-8 and H400 stack, in both sonic quality and versatility.

The K17's powerful DSP-based EQ, accessible via a computer app and then through the touchscreen or remote, adds to its appeal. Its superior three-dimensionality and natural sound make it a top contender in its class.