why buy ibasso Nunchako? i don't know; Stay away from this two-in-one trading trick, both amplifier section sound like a 50 euros dongle, so why pay 250 euros or more.
All the dongles I have sound better for one reason or another, the Fosi ds2 is warmer and with bass in evidence (but has little scenic separation), the colorfly is musical without being annoying. the ifi Gryphon is velvety and has less background noise (but it has some), but the best of all is the fiio Q15, which cost me 100 € more, is obviously not as portable as these small dongles from ibasso but it has a really massive bass with a lot of punch, scenic separation, total absence of noise and the treble is very informative without being sharp. Do yourself a favor: don't think this is the warm, restful tube sound you're looking for. I tried it with tsmr land and isn ebc80 obviously the land highlighted all these flaws, the ebc80 sounded soft and slow not inspiring.
It's the third time I've bought ibasso: the first was with the DC 03 pro when i was at the beginning of my iem journey, which I liked so much, but it had problems on one channel and I had to return it the second time with the C04 Pro which sounded full on the bass, but it had completely ruined the midrange frequencies which were unlistenable, returned immediately and now after a few months I tried this nunchako. I don't think I'll try the DC Elite, as they want even more money to have only 280 mw out. As far as I'm concerned, Ibasso is done with me.
probably with a less informative iem you won't notice all these issue ....but it has and when you'll change iem you will notice it.... so why buy it?
Keep in mind, i was iper critic because this object cost a lot if it costs 80 euros I would have forgiven him these flaws.
All the dongles I have sound better for one reason or another, the Fosi ds2 is warmer and with bass in evidence (but has little scenic separation), the colorfly is musical without being annoying. the ifi Gryphon is velvety and has less background noise (but it has some), but the best of all is the fiio Q15, which cost me 100 € more, is obviously not as portable as these small dongles from ibasso but it has a really massive bass with a lot of punch, scenic separation, total absence of noise and the treble is very informative without being sharp. Do yourself a favor: don't think this is the warm, restful tube sound you're looking for. I tried it with tsmr land and isn ebc80 obviously the land highlighted all these flaws, the ebc80 sounded soft and slow not inspiring.
It's the third time I've bought ibasso: the first was with the DC 03 pro when i was at the beginning of my iem journey, which I liked so much, but it had problems on one channel and I had to return it the second time with the C04 Pro which sounded full on the bass, but it had completely ruined the midrange frequencies which were unlistenable, returned immediately and now after a few months I tried this nunchako. I don't think I'll try the DC Elite, as they want even more money to have only 280 mw out. As far as I'm concerned, Ibasso is done with me.
probably with a less informative iem you won't notice all these issue ....but it has and when you'll change iem you will notice it.... so why buy it?
Keep in mind, i was iper critic because this object cost a lot if it costs 80 euros I would have forgiven him these flaws.
Attachments
Ichos
Sorry to hear about your experience but you must have a defective device. It is not very polite to call all reviewers as liers.
iBasso has achieved a near-cult following in the audio community. The brand is renowned for producing outstanding digital audio players (DAPs) and portable USB DACs, which often sell out before they are even listed on their website.
The name iBasso has become synonymous with exceptional value. Their products consistently offer remarkable sound quality and excellent construction at competitive prices, delivering a price-to-performance ratio that is unparalleled by any other brand.
iBasso Nunchaku
The Nunchaku represents iBasso's latest innovation in USB DAC dongles and marks their inaugural entry into this compact size featuring a tube buffer. While it is not the first device of its kind—several other tube-equipped products exist—the Nunchaku stands out as the sole option that is both compact and lightweight.
This device employs two hand-matched Raytheon JAN6418 vacuum tubes, which are directly heated. In contrast to the majority of portable devices that rely on 9V or 12V power supplies, the Nunchaku is equipped with a specialized 22.5V anode power supply tailored for the JAN6418 tubes, allowing them to function at their optimal performance.
The tubes are installed using a “hanging” method, supported by PORON material that suspends them within the chassis. This suspension technique effectively absorbs shocks and significantly minimizes the microphonic effect.
The Nunchaku not only offers a tube output mode but also incorporates a user-selectable Class AB amplification circuit. While the two modes exhibit slightly varied sound signatures, the Class AB mode provides the advantages of complete background silence and the elimination of microphonic effects, rendering it particularly suitable for sensitive in-ear monitors (IEMs).
In terms of specifications, the signal-to-noise ratio (SNR) and dynamic range for the tube mode are rated at 107dB and 110dB, respectively. These figures significantly improve in Class AB mode, reaching an impressive 130dB for both metrics.
Other technical highlights
The Nunchaku, despite its small dimensions, features a premier audio architecture that incorporates two tubes equipped with four high-performance dual OPAMPs and four BUF634A components.
For digital audio conversion, the Nunchaku employs dual CS43198 DAC chips, complemented by a proprietary FPGA and a KDS femto-second oscillator to minimize jitter. It accommodates sampling rates of up to 32bit/769kHz PCM and supports native DSD512. The device is compatible with Android, iOS, Mac, and Windows 10 computers, functioning seamlessly as a plug-and-play solution.
In tube mode, the Nunchaku utilizes a high-quality JRC hardware volume control rather than a basic digital attenuator. This configuration allows the DAC to operate at its peak output following a tube amplifier, utilizing the JRC hardware control to reduce noise and enhance the signal-to-noise ratio (SNR).
Further technical details and specifications can be found here.
Non Audio stuff
Upon my initial introduction to the iBasso Nunchaku, I anticipated that its design would necessitate a larger size to accommodate the tubes. However, upon holding the device, I was pleasantly surprised to find it not only compact but also remarkably lightweight.
The dimensions of the Nunchaku are 65x34.6x15mm, identical to those of the iBasso DC Elite, and it weighs 50g, which is 10g lighter than the DC Elite. For comparison, the FiiO KA17 measures 64×27.7×12.7mm and has a weight of 33.5g, while the Cayin RU7 has dimensions of 12x24x66mm and weighs 25g.
In terms of design, the Nunchaku closely resembles the iBasso DC Elite, albeit with some distinct differences. Its rectangular enclosure is constructed from a titanium alloy, reinforced with glass panels on both the front and back. The front features a 0.96” OLED display, while the back is made of transparent glass, allowing visibility of the two glowing tubes. The iBasso Nunchaku is exceptionally crafted and is offered in both gray and red finishes.
Operation and connectivity
The Nunchaku features a type-C USB input along with two headphone outputs: one 4.4mm balanced and one 3.5mm, which can be configured as a digital SPDIF output via the menu settings.
This device is equipped with a 0.96” display that provides real-time information, including the current sampling rate. Its user interface bears resemblance to that of the iBasso DC07PRO.
The multifunctional knob allows for volume adjustments and various settings modifications. It offers a satisfying tactile experience with smooth operation and "click" feedback.
By pressing and holding the knob, users can access the configuration menu to make necessary adjustments. Additionally, the Nunchaku is compatible with the iBasso UAC application, enabling users to make several modifications without needing to interact with the knob or the display.
Users can choose between tube or Class AB mode, modify the low pass or high pass filter, activate the SPDIF output, adjust the amplifier’s gain and balance, rotate the screen, and set the timeout duration. It is important to note that the device does not support playback control and lacks a built-in microphone.
Accessories
The package comprises a yellow leather case, two premium USB cables (one type-C to type-C and the other type-C to Lightning) housed in a storage pouch, along with a USB adapter.
Power output and working efficiency
The Nunchaku is capable of delivering up to 525mW*2/32Ω from its balanced output when operating in tube mode. This output is sufficient to power most earphones as well as a variety of easily driven full-sized headphones, such as the Aune SR7000. In Class AB mode, the output decreases to 450mW, which remains ample power and is comparable to other leading USB DAC dongles in the market.
The power consumption is impressively low, with measurements of 0.11A/0.58W in tube mode and 0.09A/0.49W in Class AB mode. The Nunchaku stands out not only for its efficiency, particularly given its tube buffer, but also as one of the most efficient portable USB DACs available. Users can confidently utilize it without concerns regarding the battery life of their phones.
Noise and heat
I have evaluated the tube mode of the Nunchaku using sensitive earphones, such as the Soundz Avant, and found that its noise floor is significantly lower than anticipated. A barely perceptible hiss is present, which does not interfere with the enjoyment of music.
The presence of tube microphonic noise is nearly nonexistent; one must tap the chassis to detect a subtle ringing sound. Additionally, the Nunchaku is effectively shielded against electromagnetic interference, while its Class AB mode operates in complete silence. Overall, it delivers an outstanding and worry-free performance.
Typically, one might expect the two tubes to produce considerable heat; however, the Nunchaku remains only slightly warm, even cooler than the iBasso DC07PRO.
Audio stuff
The Nunchaku was allowed to play music for a duration of 100 hours to ensure that the tubes were adequately burned-in.
Let us begin with the tube mode, which is the most prominent feature of the iBasso Nunchaku and serves as its primary selling point.
The two tubes effectively introduce a pleasing harmonic distortion that enhances the listening experience without compromising the overall technical performance of the DAC. The sound signature is notably musical, exhibiting a mild sweetness and warmth without becoming overly syrupy, dark, or bloomy. This device embodies a contemporary sound profile, with the tubes skillfully integrated to refine the timbre and textures while maintaining the linearity and technical precision of the unit.
The tube mode offers impressive bass and treble extension, presenting a flat frequency response that rivals that of the Class AB mode. The treble remains vibrant and clear, with no noticeable roll-off, and the detail retrieval is more than adequate.
The bass is tight and well-controlled, providing satisfying definition and layering. While the solid-state mode may deliver a more impactful and dynamic sound, the tubes excel in offering remarkable elasticity and rich textures.
The function of the tubes is to infuse the sound with a rich, analog-like "tube" character, introducing a degree of smoothness and offering a more relaxed presentation compared to the Class AB mode.
The most prominent effect pertains to the timbre, which is remarkably natural and organic, while the textures are more vivid and lush than those found in solid-state mode. The mid-range is where the true essence lies; the Nunchaku is both expressive and melodic, allowing the music to flow and radiate with vibrant harmonies.
In my experience, the Nunchaku stands out as the most organic and analog-sounding USB DAC dongle I have encountered, slightly outperforming both the Cayin RU7 and the iFi Go bar Kensei, which were previously my reference points.
The synergy between the NOS filter and the tube buffer is exceptional, resulting in a sound that is devoid of any digital artificiality or metallic harshness. The Nunchaku resembles a miniature vinyl player more than a conventional USB DAC dongle.
The tubes additionally influence the soundstage, enhancing its holographic and immersive qualities. While the Class AB mode demonstrates slightly superior positioning accuracy and separation, it falls short of the grandeur and fluidity offered by the tubes.
Although these compact JAN tubes cannot fully emulate the complete tube experience, they provide a noteworthy taste of the renowned tube magic in a portable format.
Tube mode vs solid state
The overall audio performance of the Class AB mode surpasses that of the iBasso DC04PRO, yet it does not reach the technical depth and maturity found in the iBasso DC07PRO. In general, the sound quality of the Class AB mode is at least comparable to most competing USB DAC dongles that share a similar audio architecture.
The sonic distinctions between the two modes were elaborated upon in the preceding section of the review. The Class AB mode provides slightly enhanced technical performance and improved clarity across the entire frequency spectrum. The sound is quicker, marginally more detailed, and exhibits a bit more dynamism and impact; however, it also presents a drier character, with leaner textures and a less organic timbre.
These variations are characteristic of the differences between solid-state and tube audio circuits, each offering distinct advantages and considerations. Nevertheless, the most advantageous aspect of the Nunchaku is that it allows users to experience both types of audio circuitry within a single device.
Pairing notes
The iBasso Nunchaku, with its dual operational modes, serves as a highly adaptable USB DAC dongle, compatible with a wide range of earphones and delivering excellent sound quality across various music genres.
For instance, the tube mode offers a natural timbre and an expansive soundstage, making it particularly suitable for classical music enthusiasts. Its warm and relaxed characteristics also complement brighter and more piercing earphones effectively.
Conversely, the Class AB mode provides an excellent choice for those seeking to enhance the sound of darker earphones or for enjoying contemporary music. Additionally, the inclusion of multiple digital filters allows users to explore numerous options and discover their preferred audio configuration.
Conclusion
The debate between tubes and solid-state technology is a longstanding one, but the iBasso Nunchaku offers a resolution by combining both in a single device.
The iBasso Nunchaku stands out as the first truly compact and lightweight USB DAC dongle that features both a tube buffer and Class AB operating modes, each providing its distinct sound profile.
The miniature JAN tubes are expertly integrated, delivering outstanding sonic quality and technical performance while maintaining minimal noise, low power consumption, and negligible heat output.
Additionally, the device is equipped with a convenient OLED display, a multifunctional knob, and compatibility with a dedicated application for enhanced user experience.
Well-constructed and affordably priced, the iBasso Nunchaku is the most natural-sounding USB DAC dongle I have encountered to date, making it an ideal choice for enjoying tube sound while on the move.
It has quickly become my preferred USB DAC dongle for daily music enjoyment, and for those who share my passion for tube sound, the Nunchaku should undoubtedly be included on your shortlist.
-------------------------------------------------------------------------------
The sample was kindly provided free of charge in exchange for an honest review. I don't use affiliate links. The price of the iBasso Nunchaku is $299 and you can buy it from here.
Disclaimer: For various Google indexing reasons, most parts of this review have been processed with an automatic paragraph rewriting tool. However it reads exactly the same as the original content that is available in my website.
The name iBasso has become synonymous with exceptional value. Their products consistently offer remarkable sound quality and excellent construction at competitive prices, delivering a price-to-performance ratio that is unparalleled by any other brand.
iBasso Nunchaku
The Nunchaku represents iBasso's latest innovation in USB DAC dongles and marks their inaugural entry into this compact size featuring a tube buffer. While it is not the first device of its kind—several other tube-equipped products exist—the Nunchaku stands out as the sole option that is both compact and lightweight.
This device employs two hand-matched Raytheon JAN6418 vacuum tubes, which are directly heated. In contrast to the majority of portable devices that rely on 9V or 12V power supplies, the Nunchaku is equipped with a specialized 22.5V anode power supply tailored for the JAN6418 tubes, allowing them to function at their optimal performance.
The tubes are installed using a “hanging” method, supported by PORON material that suspends them within the chassis. This suspension technique effectively absorbs shocks and significantly minimizes the microphonic effect.
The Nunchaku not only offers a tube output mode but also incorporates a user-selectable Class AB amplification circuit. While the two modes exhibit slightly varied sound signatures, the Class AB mode provides the advantages of complete background silence and the elimination of microphonic effects, rendering it particularly suitable for sensitive in-ear monitors (IEMs).
In terms of specifications, the signal-to-noise ratio (SNR) and dynamic range for the tube mode are rated at 107dB and 110dB, respectively. These figures significantly improve in Class AB mode, reaching an impressive 130dB for both metrics.
Other technical highlights
The Nunchaku, despite its small dimensions, features a premier audio architecture that incorporates two tubes equipped with four high-performance dual OPAMPs and four BUF634A components.
For digital audio conversion, the Nunchaku employs dual CS43198 DAC chips, complemented by a proprietary FPGA and a KDS femto-second oscillator to minimize jitter. It accommodates sampling rates of up to 32bit/769kHz PCM and supports native DSD512. The device is compatible with Android, iOS, Mac, and Windows 10 computers, functioning seamlessly as a plug-and-play solution.
In tube mode, the Nunchaku utilizes a high-quality JRC hardware volume control rather than a basic digital attenuator. This configuration allows the DAC to operate at its peak output following a tube amplifier, utilizing the JRC hardware control to reduce noise and enhance the signal-to-noise ratio (SNR).
Further technical details and specifications can be found here.
Non Audio stuff
Upon my initial introduction to the iBasso Nunchaku, I anticipated that its design would necessitate a larger size to accommodate the tubes. However, upon holding the device, I was pleasantly surprised to find it not only compact but also remarkably lightweight.
The dimensions of the Nunchaku are 65x34.6x15mm, identical to those of the iBasso DC Elite, and it weighs 50g, which is 10g lighter than the DC Elite. For comparison, the FiiO KA17 measures 64×27.7×12.7mm and has a weight of 33.5g, while the Cayin RU7 has dimensions of 12x24x66mm and weighs 25g.
In terms of design, the Nunchaku closely resembles the iBasso DC Elite, albeit with some distinct differences. Its rectangular enclosure is constructed from a titanium alloy, reinforced with glass panels on both the front and back. The front features a 0.96” OLED display, while the back is made of transparent glass, allowing visibility of the two glowing tubes. The iBasso Nunchaku is exceptionally crafted and is offered in both gray and red finishes.
Operation and connectivity
The Nunchaku features a type-C USB input along with two headphone outputs: one 4.4mm balanced and one 3.5mm, which can be configured as a digital SPDIF output via the menu settings.
This device is equipped with a 0.96” display that provides real-time information, including the current sampling rate. Its user interface bears resemblance to that of the iBasso DC07PRO.
The multifunctional knob allows for volume adjustments and various settings modifications. It offers a satisfying tactile experience with smooth operation and "click" feedback.
By pressing and holding the knob, users can access the configuration menu to make necessary adjustments. Additionally, the Nunchaku is compatible with the iBasso UAC application, enabling users to make several modifications without needing to interact with the knob or the display.
Users can choose between tube or Class AB mode, modify the low pass or high pass filter, activate the SPDIF output, adjust the amplifier’s gain and balance, rotate the screen, and set the timeout duration. It is important to note that the device does not support playback control and lacks a built-in microphone.
Accessories
The package comprises a yellow leather case, two premium USB cables (one type-C to type-C and the other type-C to Lightning) housed in a storage pouch, along with a USB adapter.
Power output and working efficiency
The Nunchaku is capable of delivering up to 525mW*2/32Ω from its balanced output when operating in tube mode. This output is sufficient to power most earphones as well as a variety of easily driven full-sized headphones, such as the Aune SR7000. In Class AB mode, the output decreases to 450mW, which remains ample power and is comparable to other leading USB DAC dongles in the market.
The power consumption is impressively low, with measurements of 0.11A/0.58W in tube mode and 0.09A/0.49W in Class AB mode. The Nunchaku stands out not only for its efficiency, particularly given its tube buffer, but also as one of the most efficient portable USB DACs available. Users can confidently utilize it without concerns regarding the battery life of their phones.
Noise and heat
I have evaluated the tube mode of the Nunchaku using sensitive earphones, such as the Soundz Avant, and found that its noise floor is significantly lower than anticipated. A barely perceptible hiss is present, which does not interfere with the enjoyment of music.
The presence of tube microphonic noise is nearly nonexistent; one must tap the chassis to detect a subtle ringing sound. Additionally, the Nunchaku is effectively shielded against electromagnetic interference, while its Class AB mode operates in complete silence. Overall, it delivers an outstanding and worry-free performance.
Typically, one might expect the two tubes to produce considerable heat; however, the Nunchaku remains only slightly warm, even cooler than the iBasso DC07PRO.
Audio stuff
The Nunchaku was allowed to play music for a duration of 100 hours to ensure that the tubes were adequately burned-in.
Let us begin with the tube mode, which is the most prominent feature of the iBasso Nunchaku and serves as its primary selling point.
The two tubes effectively introduce a pleasing harmonic distortion that enhances the listening experience without compromising the overall technical performance of the DAC. The sound signature is notably musical, exhibiting a mild sweetness and warmth without becoming overly syrupy, dark, or bloomy. This device embodies a contemporary sound profile, with the tubes skillfully integrated to refine the timbre and textures while maintaining the linearity and technical precision of the unit.
The tube mode offers impressive bass and treble extension, presenting a flat frequency response that rivals that of the Class AB mode. The treble remains vibrant and clear, with no noticeable roll-off, and the detail retrieval is more than adequate.
The bass is tight and well-controlled, providing satisfying definition and layering. While the solid-state mode may deliver a more impactful and dynamic sound, the tubes excel in offering remarkable elasticity and rich textures.
The function of the tubes is to infuse the sound with a rich, analog-like "tube" character, introducing a degree of smoothness and offering a more relaxed presentation compared to the Class AB mode.
The most prominent effect pertains to the timbre, which is remarkably natural and organic, while the textures are more vivid and lush than those found in solid-state mode. The mid-range is where the true essence lies; the Nunchaku is both expressive and melodic, allowing the music to flow and radiate with vibrant harmonies.
In my experience, the Nunchaku stands out as the most organic and analog-sounding USB DAC dongle I have encountered, slightly outperforming both the Cayin RU7 and the iFi Go bar Kensei, which were previously my reference points.
The synergy between the NOS filter and the tube buffer is exceptional, resulting in a sound that is devoid of any digital artificiality or metallic harshness. The Nunchaku resembles a miniature vinyl player more than a conventional USB DAC dongle.
The tubes additionally influence the soundstage, enhancing its holographic and immersive qualities. While the Class AB mode demonstrates slightly superior positioning accuracy and separation, it falls short of the grandeur and fluidity offered by the tubes.
Although these compact JAN tubes cannot fully emulate the complete tube experience, they provide a noteworthy taste of the renowned tube magic in a portable format.
Tube mode vs solid state
The overall audio performance of the Class AB mode surpasses that of the iBasso DC04PRO, yet it does not reach the technical depth and maturity found in the iBasso DC07PRO. In general, the sound quality of the Class AB mode is at least comparable to most competing USB DAC dongles that share a similar audio architecture.
The sonic distinctions between the two modes were elaborated upon in the preceding section of the review. The Class AB mode provides slightly enhanced technical performance and improved clarity across the entire frequency spectrum. The sound is quicker, marginally more detailed, and exhibits a bit more dynamism and impact; however, it also presents a drier character, with leaner textures and a less organic timbre.
These variations are characteristic of the differences between solid-state and tube audio circuits, each offering distinct advantages and considerations. Nevertheless, the most advantageous aspect of the Nunchaku is that it allows users to experience both types of audio circuitry within a single device.
Pairing notes
The iBasso Nunchaku, with its dual operational modes, serves as a highly adaptable USB DAC dongle, compatible with a wide range of earphones and delivering excellent sound quality across various music genres.
For instance, the tube mode offers a natural timbre and an expansive soundstage, making it particularly suitable for classical music enthusiasts. Its warm and relaxed characteristics also complement brighter and more piercing earphones effectively.
Conversely, the Class AB mode provides an excellent choice for those seeking to enhance the sound of darker earphones or for enjoying contemporary music. Additionally, the inclusion of multiple digital filters allows users to explore numerous options and discover their preferred audio configuration.
Conclusion
The debate between tubes and solid-state technology is a longstanding one, but the iBasso Nunchaku offers a resolution by combining both in a single device.
The iBasso Nunchaku stands out as the first truly compact and lightweight USB DAC dongle that features both a tube buffer and Class AB operating modes, each providing its distinct sound profile.
The miniature JAN tubes are expertly integrated, delivering outstanding sonic quality and technical performance while maintaining minimal noise, low power consumption, and negligible heat output.
Additionally, the device is equipped with a convenient OLED display, a multifunctional knob, and compatibility with a dedicated application for enhanced user experience.
Well-constructed and affordably priced, the iBasso Nunchaku is the most natural-sounding USB DAC dongle I have encountered to date, making it an ideal choice for enjoying tube sound while on the move.
It has quickly become my preferred USB DAC dongle for daily music enjoyment, and for those who share my passion for tube sound, the Nunchaku should undoubtedly be included on your shortlist.
-------------------------------------------------------------------------------
The sample was kindly provided free of charge in exchange for an honest review. I don't use affiliate links. The price of the iBasso Nunchaku is $299 and you can buy it from here.
Disclaimer: For various Google indexing reasons, most parts of this review have been processed with an automatic paragraph rewriting tool. However it reads exactly the same as the original content that is available in my website.
lucanato
I have just sent back the ru6 : very refined but ...it's a little bright sound without body in the bass region and I heard/read the ru7 is bright too! I love warmer sounds and with thick bass, I think nunchako is not for me nor the ru7
Gustavo1976
Musehifi M5 ultra is a good option I think
