The iFi Go bar Kensei was kindly provided as a long term loan in exchange for an honest review. I didn’t receive monetary or any other kind of compensation and I don’t use affiliate links. The price of the iFi Go bar Kensei is €449 and you can buy it from all authorized dealers around the world.
iFi Go bar Kensei Review
iFi currently produces three portable USB DAC dongles. The entry level, iFi Go link, the regular sized iFi Go bar and its limited edition, the iFi Go bar/Gold edition which is now sold out. The brand new addition to the family is the iFi Go bar Kensei which incorporates all the extra technical features that were to be found in the Gold edition plus a few more.
Technical highlights
The GO bar Kensei by iFi utilizes a 16-core XMOS microcontroller in its DAC section to handle audio data from the USB input and seamlessly integrate with the 32-bit Cirrus Logic DAC chipset. With a tailored digital filter to reduce pre-echoes and ringing artifacts, along with a Global Master Timing precision clock system for minimal jitter, the iFi Go bar Kensei ensures top-notch audio quality. Supporting PCM up to 32-bit/384kHz, native DSD playback up to DSD256, 2x DXD, and complete MQA decoding, this device is designed to deliver exceptional sound performance.
The analogue circuitry features a balanced design with a symmetrical twin-channel output stage. This topology, usually reserved for larger and more expensive amplifiers owing to its cost and complexity, reduces noise and crosstalk in the signal path by fully separating the left and right channels.
Circuitry enhancements
The Kensei Go bar utilizes upgraded power supply and clock circuitry in comparison to the standard Go bar. The Gold edition also includes improved power supply, although iFi has not disclosed the variances between it and the Kensei model. Upon examining the circuit boards, it is evident that the Go bar has one capacitor, the Kensei has three, and the Gold edition has four. While the specific values of the capacitors are unknown, it appears that the Gold edition has a higher rectifying capacitance.
K2HD Processing technology
The iFi Go bar Kensei introduces an exciting and highly sought-after feature – the incorporation of the K2HD processing technology. This innovative algorithm breathes life into dull and uninspiring digital recordings by infusing them with vibrant and authentic harmonics.
The exceptional uniqueness of K2HD lies in its remarkable ability to extend high frequencies, allowing for the revival of natural harmonics and overtones that go beyond the standard 22kHz limit. As a result, the audio quality achieved is remarkably close to that of the original master recording.
The engineers at Victor Studio initially created the K2HD technology after realizing a disconnect in emotion between their original masters and digital sub-masters. This discovery prompted them to embark on a journey to find a solution. The K2 parameter values for the Go bar Kensei, provided by iFi, are entirely novel and have never been utilized before. These values were carefully chosen by JVC/KENWOOD and underwent a listening test conducted by studio engineers at Victor Studios.
To activate the K2HD processing technology, press and hold the setup button for 3 seconds. Once the MQA LED begins to flash, proceed by pressing the volume(+) button to illuminate the K2HD LED, indicating that it is now active. Please note that the K2HD mode is only functional with PCM audio file formats and a sampling frequency of ≤192kHz. It is important to mention that the K2HD mode cannot be activated with DSD or MQA audio file formats. Additionally, while the K2HD is compatible with the GTO filter, the upsampling frequency will be limited to 192kHz instead of 384kHz.
Other features
The Kensei Go bar incorporates iFi’s iEMatch technology to accommodate high sensitivity IEMs, as well as a Turbo mode (high gain) for power-hungry headphones. The iEMatch is effective for both the 3.5mm and 4.4mm outputs, which can be selected using a micro switch located on the side of the chassis. To enable high gain, simply press the volume + and – buttons simultaneously. In addition, the 3.5mm output features iFi’s S-Balanced technology, reducing crosstalk and noise by 50% compared to regular single-ended outputs. The Kensei Go bar also includes iFi’s renowned XBass+ and XSpace analog processing modes, which enhance bass and soundstage perception. These two modes can be activated separately or simultaneously.
Appearance and build quality
The GO Bar Kensei’s chassis is meticulously crafted using Japanese stainless steel to ensure maximum rigidity and protection against EMI. Its surfaces feature a matte polish that strikes the perfect balance, avoiding excessive shine and preventing fingerprints from being easily visible. The iFi and Kensei logos are elegantly engraved on the front surface, along with all other operational markings, ensuring durability and avoiding the use of ink printing. The craftsmanship and finish of the iFi Go bar Kensei are unparalleled, making it one of the finest USB DAC dongles available in the market. From a subjective standpoint, the Kensei surpasses the Go bar and Go bar Gold edition in terms of aesthetics, making it perhaps the most visually stunning and premium-looking portable USB stick among its competitors.
Measuring at a compact size of 65 x 22 x 13.2 mm, the iFi Go bar Kensei is not larger than similar products, but it does have a substantial weight difference. Weighing in at 65.5g, it is significantly heavier than the 28.5g iFi Go bar. While it remains pocket-friendly and small in size, it is advisable not to leave it hanging out from your smartphone due to its weight.
Accessories
The iFi Go bar Kensei is presented in a beautifully designed wooden box, accompanied by a leather carrying case, two short USB type-C to C and USB type-C to lightning cables, as well as a USB adapter.
Power output and consumption
The Go bar Kensei has a rated power output of 475mW/32Ω or 7.2V/600Ω from its balanced output, and 300mW/32Ω or 3.8V/600Ω from the unbalanced output, matching the iFi Go bar. It stands out as one of the most powerful USB DAC dongles capable of driving full-sized headphones such as the Sennheiser HD660S2, and HIFIMAN Arya Organic. Additionally, the Kensei is suitable for use with sensitive earphones due to its low noise output, and users have the option to enable the iEMatch feature to eliminate any background noise.
The iFi Go bar Kensei consumes 0.12A/0.63W when idle and 0.16A/0.81W when playing high-resolution material with the Meze Liric 2 at a loud volume. While not the most efficient USB dongle available, it is not more power-hungry than other notoriously inefficient models like the Cayin RU-7 (0.18A/0.92W).
Listening impressions
The iFi Go bar Kensei showcases exceptional sonic performance, placing it in the upper echelon of its category. Surpassing the iFi Go bar, it delivers sonic qualities on par with the highly acclaimed Go bar Gold edition, which is renowned as one of the finest dongles available in the market. Of course there are slight differences in sound between the two, that will be further explored later on.
The Kensei offers an incredibly immersive and captivating listening experience, blending an analog-like and organic tone with exceptional technical prowess. Even without the K2HD mode activated, the Kensei produces a lifelike and authentic sound, free from any noticeable digital harshness. Occasionally, the treble may come across as slightly artificial, but this perception completely disappears once the K2HD mode is enabled. The subtle yet impactful effects provided by the K2HD mode can be seen as the perfect finishing touch.
By reintroducing and enhancing the natural harmonics that were previously absent in the higher frequencies, the K2HD mode delivers an expressive and realistic sound that flows effortlessly, brimming with vibrant harmonics and captivating overtones. The Kensei emulates the essence of a compact analog setup, elevating your music to new heights and evoking a profound emotional connection. It’s important to note that not all audio tracks will benefit from the K2HD processing technology, as there may be instances where no discernible audible differences are detected with or without the K2HD.
More listening impressions
The iFi Go bar Kensei offers exceptional clarity and transparency with remarkable precision and definition. Its ability to deliver deep and layered bass with tight control and impactful presence is truly impressive. Moreover, this device exhibits dynamic and highly contrasting qualities, allowing all earphones to come alive and effortlessly follow sudden and instantaneous dynamic changes. The Kensei’s ability to reproduce the finest micro details is unparalleled, showcasing remarkable resolution and refinement. Remarkably, it achieves this without ever sounding analytical or mechanical. While it is true that some competitors, even those at a lower price point, may offer slightly more transparency and crystalline sound with better precision and detail extraction, they often sacrifice warmth and emotion, something that the Kensei never fails to deliver.
The Kensei offers a soundstage that is not only spacious and wide with precise positioning, but it also provides an incredibly immersive and holographic experience. Its ability to convey a wealth of ambient details greatly enhances the overall realism. If you’re looking to transform your earphones into ear-speakers, the Kensei is definitely one of my top picks, especially for enjoying classical music.
Vs the other Go bars
The iFi Go bar Kensei stands out from its brothers not only for its stunning appearance but also for its exceptional sound quality. Surpassing the iFi Go bar in terms of transparency, clarity, technicalities, and timbre, the Kensei offers a truly immersive listening experience. On the other hand, the iFi Go bar Anniversary edition is on par with the Kensei, with differences in sound preference rather than performance variations. The Gold bar delivers a warmer and slightly thicker sound signature, accompanied by a more impactful and weighty bass. In contrast, the Kensei offers superior transparency, clarity, and definition, resulting in a more controlled and precise sound. While the Gold edition already possesses a natural and organic timbre, the K2HD further elevates these qualities, particularly in the critical higher frequencies, providing a less digital and more resolving sound.
Vs the Cayin RU-7
It is quite challenging to make a comparison between these two USB DAC dongles as they share more similarities than differences. In terms of timbre realism and tonal accuracy, both the Cayin RU7 and the iFi Go bar Kensei are among the top choices available in the market. However, in my opinion, the Cayin RU-7 offers a slightly more natural sound with a better overall sense of realism and soundstage holography.
The variances between them are subtle, and I would be content with either of them as my ultimate USB DAC dongle. I highly recommend both of them, and it would be wise to consider other non-audio factors in order to make a decision. The iFi Go bar Kensei offers more additional features that allow for a personalized listening experience, whereas the Cayin RU-7 provides a genuine, unamplified line output (both 4.4mm and 3.5mm), making it possible to use it as a miniature 1-bit DSD DAC.
In the end
The iFi Go bar Kensei offers more than the regular Go bar and even exceeds the limited Gold edition, depending on individual preferences. Despite being slightly pricier, the Kensei justifies its cost with exceptional sonic quality and a wide range of features. Actually, the Kensei is easily among the few best sounding USB DAC dongles in the market, thus earning the prestigious “Kensei” title in “summa cum laude”.
Copyright – Petros Laskis 2024.
+ Exceptional sound quality
+ Impressive tonal balance
+ Inherently musical and engaging
+ Analog and organic timbre
+ Without digital glare and artificiality
+ Powerful for a USB stick
+ Premium looks
+ Extremely well made
+ Compact size
+ Many features
+ K2HD processing technology
+ Accessories
- A lot heavier than the competition
- Increased power consumption
- Awkward user interface
- No dedicated line output
- No application
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