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GUSTARD U18 DDC USB Digital Interface DSD512 PCM768Khz XU216 K2 Fully Isolation AS338 Hi-End Crystol IIS USB Audio Interface (Black)

Description:

  • XU216 from XMOS has 16 cores, which brings rich resources and smooth experience.
  • Fully isolation:Complete grounding isolation is achieved by 200 Mbps isolator to eliminate all interference from your PC . 2nd generation clock Synthesizer with ultra-low noise: Support external oCXO. K2 can generate the audio-specific frequency using 10Mhz clock source with extremely low loss.
  • Independent CPLO for signal shaping:In the CPLD for signal processing, the isolated IIS signal is reshaped to remove the jitter introduced by isolator . selected crystol for Hi-end audio AS338 :Two AS338 Hi-End audio oscillators from Accusilicon. The jitter is as low as 38fs, whic h greatly improves the bass quality, and bring a more harmony sound.
  • Specific toroidal transformer for audio:The power supply of clock is based on LT 3045-a high performance low dropout linear regulator, whose RMS Noise is only 0.8μVRMS (10Hz to 100kHz).
  • IIS-H Configurable IIS pinout:Configurable HIS pinout with 4 modes. Stock configuration is Gustard mode Click right to change pinout and long push is to change DSDflag. Please confirm your DAC'S pinout before change this option. Only support these 4 modes.
  • Review:

    5.0 out of 5 stars It REALLY makes a difference

    R.T. · December 16, 2023

    So I have had the Gustard R26 DAC for over 6 months now. When I first plugged it in, it was a WOW moment. It had so much space, clarity and detail over my previous DAC. But as the months wore on, I found it much more to admire than to love. It was very, very controlled....maybe a bit too controlled, and although had great front-to-back depth, the sound never seemed completely unpinned from the speakers in a way I know they are capable of.So what did I do? Well FIRST I got an external clock. A modestly priced LHY OCK-1 model. By the time I added in a custom built length of LMR400 50-Ohm coax and trew in an after market fuse I had over $500 into it. Plus another $200 for a Pangea power cord.I spend weeks listening with and without the clock-something that can be done using the R26 remote on the fly. And I could not hear a single difference between running the R26 with its internal clock, or slaving it to the OCK-1. I probably would have sent it back, but since I got it on Ali Express, the return shipping would have not left me with much refund (assuming I ever got one).So then I throught I would try a risk-free trial of the U18 D2D convertor, which I got through Bolo with about an 8 week window to return it for full refund, and no shipping expenses. So I got it.Now I have the external clock, R26 and the U18.I use the USB into the U18 and the I2S HDMI cable out from it into the R26.Without any external clock, the R26 clock slaves to that of the U18's when connected with the HDMI.And that is how I first tried it...the Node N130 (with outboard DC linear power supply) -->DDC-HDMI-->R26 with no external clock.And from the very first note I knew something special was happening-which was NOT the case when I had used the OCK-1 clock. The sound was more relaxed, yet more involving with a much enhanced sense of space and timing compared to the R26 with/without external clock. And I listened to it in this way for a while.A few days later I re-introduced the external clock back into the mix. I had to get another 50-Ohm coax, but the end result was I slaved BOTH the U18 and the R26 in parallel to the same OCK-1 external clock.And BINGO....finally the external clock did make a difference. The overall presentation is quite addictive, taking everthing that the U18-R26 pairing did, and improving it in every way. Bass control and textures especially were enhanced.So now I am more than happy with what the external clock does for the R26. But do NOT get a clock before the U18, as you probably will have the same underwhelming experience as I did. The external clock should only be considered after a U18 is in place.The R26-U18 should really be considered a 2 piece integrated DAC, as the modest additional cost of the U18 only adds 30% to the purchase price, but gives an 80% boost in listening pleasure.I still have another 6 weeks trial period, but I already know-there is no way I will be returning the U18.

    5.0 out of 5 stars Genuinely wish I bought this sooner.

    S.K. · August 2, 2025

    Im a skep by nature but this unit was enough to justify the purchase. It made a noticeable difference from whatnI thought was already great. Looks great too. Buy it. Happy customer.

    5.0 out of 5 stars Impressive

    R.T. · September 20, 2023

    My audio streaming setup was an overhauled Bluesound Node 2i connected to a Gustard X26 PRO DAC. The Bluesound overhaul consisted of a package from LHY Audio with a new internal power supply board and external LPS. The difference in sound quality after installation was considerable. Still, the sound was not quite there. I read about the effect of adding the U18 to the mix and gave it a shot. What an improvement! As a system, the sound is rounder, more detailed, displays ample bass and even a bit louder at the same volume setting as before. Each upgrade, including cables, has added to the sound quality. This step, however, has had an altogether surprisingly powerful positive impact. Whereas before, SQ was a bit lacking. Now, it is where I wanted it all along. I was concerned about the need to get a fancy I2S cable to connect U18 to X26 PRO, but the U18 enables a standard HDMI cable connection between it and the same brand DAC. I am at the point where money thrown at higher priced components is unnecessary, a very nice place to be.

    3.0 out of 5 stars No difference

    M. · March 13, 2024

    Tried with Gustard R26, no difference whatsoever. I guess if your computer does produce a lot of noise, then galvanic insulation is worth it, but technically DAC (the receiver) should be properly designed to reject it. Perhaps R26 is, indeed, properly designed.

    5.0 out of 5 stars Makes the sound more natural and open.

    v. · March 30, 2022

    The Gustard U18 is a wonderful addition to Gustard X26 Pro. The sound is very natural.

    1.0 out of 5 stars This is crazy

    M.c. · August 31, 2024

    I opened the box and this is what I found. Heavy rubber pieces and a half ream of comp paper.

    5.0 out of 5 stars Extremely great value for the money. All but eliminates electrical and digital distortion.

    J.K. · November 27, 2022

    First, for those who want to understand how DDC is connected in the digital audio system:USB Streamer (such as PC) > DDC > DAC > Amplifier > Speaker.USB streaming is NOISY. It has tons of electric distortion and digital jitter which makes your computer audio, especially its background and higher treble, have that sharp bite which fatigues the ears.Although both DAC, preamp, and amplifiers all produce their own digital distortion, this DDC is designed to at least "purify" the digital sound before it sends them to the DAC. In other words, this DDC purifies the USB signal coming from the streaming source.DDC such as this achieves this in two ways, first it removes the electrical distortion by separating the USB signal and powering it with its own "clean" toroidal transformer. Second, it uses its excellent internal K2 femto clock to precisely time-aiign the digital signal, which effectively removes the digital jitter.I have used both the I2S and toslink outputs and both are excellent.So how does all this impact the sound? The sound would come off as noticeably clearer, the background would be far more darker, and your ears would be able to listen to music without the normal discomfort and airbite associated with digital music. In short, this can make your digital music sound like analog but with the dynamic range and imaging of the digital music (assuming you have decent DAC, amp, and speakers). Sounds like a good investment? Yes it is.Pros:1)All but eliminates electrical and digital jitter distortions. This means much more clear sound with detailed imaging you can hear without interference.2)Has an impressive Femto clock that precisely aligns digital signal prior to sending it to DAC, resulting in precise and detailed music without the glare associated with digital music.3)Extremely great value for the money.4)Fairly small (little larger than a cracker jack box).Cons:1)Build quality isn't top notch but what do you expect for a lower priced DDC?

    5.0 out of 5 stars A must!

    P. · December 10, 2022

    Wow! This little box changed the sound. It is close to perfect!

    Fantastischer Klang.

    A. · July 25, 2024

    Ich verwende den U18 DDC nur zur Wandlung USB zu Toslink S/PDIF. Mit meinem Musical Fidelity spielt das perfekt, ausgewogen, transparent, nicht aggressiv, "knorriger" Bass, extrem räumlich in Breite und Tiefe. Bin begeistert.

    Soldi ben spesi

    A.G. · March 23, 2025

    La spesa è valsa la pena perché l'aggiunta dell'interfaccia USB mi ha permesso il collegamento tramite presa i2S e il suono è migliorato in modo evidente acquistando spazialità e dettaglio

    これは良い

    M. · November 15, 2024

    R26を使用している事もありこちらの機器は前から気になっておりました。DDCという機器の事はよく分かりませんがレビューを参考にしたり色々と調べていたところ、先日Bolo で10%オフでしたので急いで購入してしまいました。なのでこちらに使用するケーブル類などはまだ揃えていない状態でのレビューになります。先ずは音質の傾向が知りたく、家にあったエントリーグレードの5,000円ぐらいの電源ケーブルと同じく家にあった1,300円ぐらいのHDMIケーブルという間に合わせの物でとりあえず繋いでみたところ、それでもちょっとびっくりするぐらい音が良くなりました。これでオーディオグレードのHDMIケーブルに変えたり電源ケーブルを良くしたり、115Vにアップトランスしたりしたら、、などと思うとお財布的には厳しいですがちょっと楽しみですね。因みに色々なレビューを参考にしてこちらの機器にはクロックは繋がない予定です。しかし下手なアクセサリーでも結構な金額しますので、それを考えるとこの機器は大変コスパが良いと思います。以前のレビューにもありますがR26を使用されている場合は特にお薦めです。

    最新のDDCだけあって輝くような音色を感じる。

    て. · May 22, 2024

    電源を入れた当初から素晴らしい音色で満足した。輝くばかりの鮮やかさだ。

    デジタルオーディオには必要不可欠

    魚. · July 23, 2023

    DDCなんて必要ないと思っていましたが、全然変わりますね。安物のDDCも直前に購入してましたが、安物はな何の効果もないです。欠点は、電源は入れっぱなしにしないといけないのと、発熱がそこそこあるので暑い部屋だと何かしら対策しなければならないことでしょうか。

    GUSTARD U18 DDC USB Digital Interface DSD512 PCM768Khz XU216 K2 Fully Isolation AS338 Hi-End Crystol IIS USB Audio Interface (Black)

    Product ID: UO09YYCK95M
    Condition: New

    3.9

    BHD28516

    Price includes VAT & Import Duties
    Color: Black
    Product imageProduct image
    Availability: In Stock

    Quantity:

    |

    Order today to get by

    Free delivery on orders over BHD 20

    Return and refund policies

    Imported From: United States

    At bolo.bh, we stand behind the authenticity and quality of every product we sell. We guarantee that all items offered on our website are 100% genuine, sourced directly from authorized distributors, trusted partners, or the original brands themselves.

    We do not sell counterfeit, replica, or unauthorized goods. Each product undergoes thorough inspection and verification at our consolidation and fulfilment centers to ensure it meets our strict authenticity and quality standards before being shipped and delivered to you.

    If you ever have concerns regarding the authenticity of a product purchased from us, please contact Bolo Support . We will review your inquiry promptly and, if necessary, provide documentation verifying authenticity or offer a suitable resolution.

    Your trust is our top priority, and we are committed to maintaining transparency and integrity in every transaction.

    All product information, including images, descriptions, and reviews, is provided by third-party vendors. bolo.bh is not responsible for any claims, promotions, or representations made within product content or images. For more accurate or detailed product information, please contact the manufacturer directly or reach out to Bolo Support.

    Unless otherwise stated during checkout, all prices displayed on the product page include applicable taxes and import duties.

    bolo.bh operates in accordance with the laws and regulations of Bahrain. Any items found to be restricted or prohibited for sale within the UAE will be cancelled prior to shipment. We take proactive measures to ensure that only products permitted for sale in Bahrain are listed on our website.

    All items are shipped by air, and any products classified as “Dangerous Goods (DG)” under IATA regulations will be removed from the order and cancelled.

    All orders are processed manually, and we make every effort to process them promptly once confirmed. Products cancelled due to the above reasons will be permanently removed from listings across the website.

    Similar suggestions by Bolo

    More from this brand

    Similar items from “Amplifiers”

    GUSTARD U18 DDC USB Digital Interface DSD512 PCM768Khz XU216 K2 Fully Isolation AS338 Hi-End Crystol IIS USB Audio Interface (Black)

    Product ID: UO09YYCK95M
    Condition: New

    3.9

    Color: Black
    Product imageProduct image

    BHD28516

    Price includes VAT & Import Duties
    Availability: In Stock

    Quantity:

    |

    Order today to get by

    Free delivery on orders over BHD 20

    Return and refund policies

    Imported From: United States

    At bolo.bh, we stand behind the authenticity and quality of every product we sell. We guarantee that all items offered on our website are 100% genuine, sourced directly from authorized distributors, trusted partners, or the original brands themselves.

    We do not sell counterfeit, replica, or unauthorized goods. Each product undergoes thorough inspection and verification at our consolidation and fulfilment centers to ensure it meets our strict authenticity and quality standards before being shipped and delivered to you.

    If you ever have concerns regarding the authenticity of a product purchased from us, please contact Bolo Support . We will review your inquiry promptly and, if necessary, provide documentation verifying authenticity or offer a suitable resolution.

    Your trust is our top priority, and we are committed to maintaining transparency and integrity in every transaction.

    All product information, including images, descriptions, and reviews, is provided by third-party vendors. bolo.bh is not responsible for any claims, promotions, or representations made within product content or images. For more accurate or detailed product information, please contact the manufacturer directly or reach out to Bolo Support.

    Unless otherwise stated during checkout, all prices displayed on the product page include applicable taxes and import duties.

    bolo.bh operates in accordance with the laws and regulations of Bahrain. Any items found to be restricted or prohibited for sale within the UAE will be cancelled prior to shipment. We take proactive measures to ensure that only products permitted for sale in Bahrain are listed on our website.

    All items are shipped by air, and any products classified as “Dangerous Goods (DG)” under IATA regulations will be removed from the order and cancelled.

    All orders are processed manually, and we make every effort to process them promptly once confirmed. Products cancelled due to the above reasons will be permanently removed from listings across the website.

    Description:

  • XU216 from XMOS has 16 cores, which brings rich resources and smooth experience.
  • Fully isolation:Complete grounding isolation is achieved by 200 Mbps isolator to eliminate all interference from your PC . 2nd generation clock Synthesizer with ultra-low noise: Support external oCXO. K2 can generate the audio-specific frequency using 10Mhz clock source with extremely low loss.
  • Independent CPLO for signal shaping:In the CPLD for signal processing, the isolated IIS signal is reshaped to remove the jitter introduced by isolator . selected crystol for Hi-end audio AS338 :Two AS338 Hi-End audio oscillators from Accusilicon. The jitter is as low as 38fs, whic h greatly improves the bass quality, and bring a more harmony sound.
  • Specific toroidal transformer for audio:The power supply of clock is based on LT 3045-a high performance low dropout linear regulator, whose RMS Noise is only 0.8μVRMS (10Hz to 100kHz).
  • IIS-H Configurable IIS pinout:Configurable HIS pinout with 4 modes. Stock configuration is Gustard mode Click right to change pinout and long push is to change DSDflag. Please confirm your DAC'S pinout before change this option. Only support these 4 modes.
  • Review:

    5.0 out of 5 stars It REALLY makes a difference

    R.T. · December 16, 2023

    So I have had the Gustard R26 DAC for over 6 months now. When I first plugged it in, it was a WOW moment. It had so much space, clarity and detail over my previous DAC. But as the months wore on, I found it much more to admire than to love. It was very, very controlled....maybe a bit too controlled, and although had great front-to-back depth, the sound never seemed completely unpinned from the speakers in a way I know they are capable of.So what did I do? Well FIRST I got an external clock. A modestly priced LHY OCK-1 model. By the time I added in a custom built length of LMR400 50-Ohm coax and trew in an after market fuse I had over $500 into it. Plus another $200 for a Pangea power cord.I spend weeks listening with and without the clock-something that can be done using the R26 remote on the fly. And I could not hear a single difference between running the R26 with its internal clock, or slaving it to the OCK-1. I probably would have sent it back, but since I got it on Ali Express, the return shipping would have not left me with much refund (assuming I ever got one).So then I throught I would try a risk-free trial of the U18 D2D convertor, which I got through Bolo with about an 8 week window to return it for full refund, and no shipping expenses. So I got it.Now I have the external clock, R26 and the U18.I use the USB into the U18 and the I2S HDMI cable out from it into the R26.Without any external clock, the R26 clock slaves to that of the U18's when connected with the HDMI.And that is how I first tried it...the Node N130 (with outboard DC linear power supply) -->DDC-HDMI-->R26 with no external clock.And from the very first note I knew something special was happening-which was NOT the case when I had used the OCK-1 clock. The sound was more relaxed, yet more involving with a much enhanced sense of space and timing compared to the R26 with/without external clock. And I listened to it in this way for a while.A few days later I re-introduced the external clock back into the mix. I had to get another 50-Ohm coax, but the end result was I slaved BOTH the U18 and the R26 in parallel to the same OCK-1 external clock.And BINGO....finally the external clock did make a difference. The overall presentation is quite addictive, taking everthing that the U18-R26 pairing did, and improving it in every way. Bass control and textures especially were enhanced.So now I am more than happy with what the external clock does for the R26. But do NOT get a clock before the U18, as you probably will have the same underwhelming experience as I did. The external clock should only be considered after a U18 is in place.The R26-U18 should really be considered a 2 piece integrated DAC, as the modest additional cost of the U18 only adds 30% to the purchase price, but gives an 80% boost in listening pleasure.I still have another 6 weeks trial period, but I already know-there is no way I will be returning the U18.

    5.0 out of 5 stars Genuinely wish I bought this sooner.

    S.K. · August 2, 2025

    Im a skep by nature but this unit was enough to justify the purchase. It made a noticeable difference from whatnI thought was already great. Looks great too. Buy it. Happy customer.

    5.0 out of 5 stars Impressive

    R.T. · September 20, 2023

    My audio streaming setup was an overhauled Bluesound Node 2i connected to a Gustard X26 PRO DAC. The Bluesound overhaul consisted of a package from LHY Audio with a new internal power supply board and external LPS. The difference in sound quality after installation was considerable. Still, the sound was not quite there. I read about the effect of adding the U18 to the mix and gave it a shot. What an improvement! As a system, the sound is rounder, more detailed, displays ample bass and even a bit louder at the same volume setting as before. Each upgrade, including cables, has added to the sound quality. This step, however, has had an altogether surprisingly powerful positive impact. Whereas before, SQ was a bit lacking. Now, it is where I wanted it all along. I was concerned about the need to get a fancy I2S cable to connect U18 to X26 PRO, but the U18 enables a standard HDMI cable connection between it and the same brand DAC. I am at the point where money thrown at higher priced components is unnecessary, a very nice place to be.

    3.0 out of 5 stars No difference

    M. · March 13, 2024

    Tried with Gustard R26, no difference whatsoever. I guess if your computer does produce a lot of noise, then galvanic insulation is worth it, but technically DAC (the receiver) should be properly designed to reject it. Perhaps R26 is, indeed, properly designed.

    5.0 out of 5 stars Makes the sound more natural and open.

    v. · March 30, 2022

    The Gustard U18 is a wonderful addition to Gustard X26 Pro. The sound is very natural.

    1.0 out of 5 stars This is crazy

    M.c. · August 31, 2024

    I opened the box and this is what I found. Heavy rubber pieces and a half ream of comp paper.

    5.0 out of 5 stars Extremely great value for the money. All but eliminates electrical and digital distortion.

    J.K. · November 27, 2022

    First, for those who want to understand how DDC is connected in the digital audio system:USB Streamer (such as PC) > DDC > DAC > Amplifier > Speaker.USB streaming is NOISY. It has tons of electric distortion and digital jitter which makes your computer audio, especially its background and higher treble, have that sharp bite which fatigues the ears.Although both DAC, preamp, and amplifiers all produce their own digital distortion, this DDC is designed to at least "purify" the digital sound before it sends them to the DAC. In other words, this DDC purifies the USB signal coming from the streaming source.DDC such as this achieves this in two ways, first it removes the electrical distortion by separating the USB signal and powering it with its own "clean" toroidal transformer. Second, it uses its excellent internal K2 femto clock to precisely time-aiign the digital signal, which effectively removes the digital jitter.I have used both the I2S and toslink outputs and both are excellent.So how does all this impact the sound? The sound would come off as noticeably clearer, the background would be far more darker, and your ears would be able to listen to music without the normal discomfort and airbite associated with digital music. In short, this can make your digital music sound like analog but with the dynamic range and imaging of the digital music (assuming you have decent DAC, amp, and speakers). Sounds like a good investment? Yes it is.Pros:1)All but eliminates electrical and digital jitter distortions. This means much more clear sound with detailed imaging you can hear without interference.2)Has an impressive Femto clock that precisely aligns digital signal prior to sending it to DAC, resulting in precise and detailed music without the glare associated with digital music.3)Extremely great value for the money.4)Fairly small (little larger than a cracker jack box).Cons:1)Build quality isn't top notch but what do you expect for a lower priced DDC?

    5.0 out of 5 stars A must!

    P. · December 10, 2022

    Wow! This little box changed the sound. It is close to perfect!

    Fantastischer Klang.

    A. · July 25, 2024

    Ich verwende den U18 DDC nur zur Wandlung USB zu Toslink S/PDIF. Mit meinem Musical Fidelity spielt das perfekt, ausgewogen, transparent, nicht aggressiv, "knorriger" Bass, extrem räumlich in Breite und Tiefe. Bin begeistert.

    Soldi ben spesi

    A.G. · March 23, 2025

    La spesa è valsa la pena perché l'aggiunta dell'interfaccia USB mi ha permesso il collegamento tramite presa i2S e il suono è migliorato in modo evidente acquistando spazialità e dettaglio

    これは良い

    M. · November 15, 2024

    R26を使用している事もありこちらの機器は前から気になっておりました。DDCという機器の事はよく分かりませんがレビューを参考にしたり色々と調べていたところ、先日Bolo で10%オフでしたので急いで購入してしまいました。なのでこちらに使用するケーブル類などはまだ揃えていない状態でのレビューになります。先ずは音質の傾向が知りたく、家にあったエントリーグレードの5,000円ぐらいの電源ケーブルと同じく家にあった1,300円ぐらいのHDMIケーブルという間に合わせの物でとりあえず繋いでみたところ、それでもちょっとびっくりするぐらい音が良くなりました。これでオーディオグレードのHDMIケーブルに変えたり電源ケーブルを良くしたり、115Vにアップトランスしたりしたら、、などと思うとお財布的には厳しいですがちょっと楽しみですね。因みに色々なレビューを参考にしてこちらの機器にはクロックは繋がない予定です。しかし下手なアクセサリーでも結構な金額しますので、それを考えるとこの機器は大変コスパが良いと思います。以前のレビューにもありますがR26を使用されている場合は特にお薦めです。

    最新のDDCだけあって輝くような音色を感じる。

    て. · May 22, 2024

    電源を入れた当初から素晴らしい音色で満足した。輝くばかりの鮮やかさだ。

    デジタルオーディオには必要不可欠

    魚. · July 23, 2023

    DDCなんて必要ないと思っていましたが、全然変わりますね。安物のDDCも直前に購入してましたが、安物はな何の効果もないです。欠点は、電源は入れっぱなしにしないといけないのと、発熱がそこそこあるので暑い部屋だと何かしら対策しなければならないことでしょうか。

    Similar suggestions by Bolo

    More from this brand

    Similar items from “Amplifiers”