{"id":4838,"date":"2026-01-19T10:08:36","date_gmt":"2026-01-19T09:08:36","guid":{"rendered":"https:\/\/vumetre.com\/en\/?p=4838"},"modified":"2026-02-03T14:29:49","modified_gmt":"2026-02-03T13:29:49","slug":"reiki-jundostream-reference","status":"publish","type":"post","link":"https:\/\/vumetre.com\/en\/tests\/reiki-jundostream-reference\/","title":{"rendered":"REIKI Jundostream Reference"},"content":{"rendered":"\n

If you think that an Ethernet cable is just a conductor of \u00ab0\u00bbs and \u00ab1\u00bbs, you may be<\/strong> mistaken. In that case, the monumental Reiki Jundostream Reference cable will show you that it can literally<\/strong> transcend your listening experience.<\/strong><\/p>\n\n\n\n

Network playback is far from having revealed all its secrets to us. It is essential for us to understand how far we are sometimes from the goal in terms of optimizing this very special protocol. For many years now, we have been delving deep into the heart of this mysterious discipline, and we have learned a great deal. A new chapter in this learning process has been written today thanks to a simple cable. Well, simple… not so sure. <\/p>\n\n\n\n

Just by looking at it, the JundoStream Reference displays all its heart of this mysterious discipline, and we have learned a great deal. A new chapter in this learning process has been written today thanks to a simple cable. Well, simple… not so sure.<\/p>\n\n\n\n

Just by looking at it, the JundoStream Reference displays all its the nature of Ethernet connections, the Reiki Audio team decided to embark on an in-depth study to understand and test the performance limits of network cables. After studying every aspect of the design, they concluded that the physical structure of network cables, whether Cat-compliant, audiophile or both, essentially limits audio performance.<\/p>\n\n\n\n

All these cables are variations on the same basic architecture, i.e. four twisted pairs covered with a metal foil, adjacent to each other, with a braided shield around the four pairs that is connected to ground at both plugs. This architecture, combined with high twist rates, allows Cat 8 cables to reliably carry much more data than Cat 7, Cat 6, etc. cables because it is effective at rejecting radio frequency interference while minimizing crosstalk between pairs.<\/p>\n\n\n\n

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But they also achieve this by using variable twist rates to ensure that the conductors in adjacent pairs do not have regular contact points along their entire length. Only one pair can have the highest twist rate of the four, and that pair is the most effective at rejecting radio frequency interference. If we could use four twisted pairs with the same twist rate as the highest, noise rejection would be improved… but of course, the risk of crosstalk would increase…<\/p>\n\n\n\n

The solution, of course, is to physically separate the twisted pairs so that they can all share the same twist rate as the highest (for noise rejection), but without the risk of crosstalk. To get as close as possible to this theoretical ideal, JundoStream consists of four twisted pairs with a twist rate higher than the Cat 8 standard. They are arranged in parallel and interspersed with three air-filled silicone spacer tubes to maintain a constant distance between the pairs.<\/p>\n\n\n\n

But all this is theory. And for Reiki Audio, there was no way to verify it \u2018in real life\u2019 beyond assembling a few rudimentary prototypes. To develop the JundoStream iteratively, Reiki Audio had no choice but to take the plunge and hope that the result would deliver in practice what it promised in theory.<\/p>\n\n\n\n

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This meant investing a lot of time and money in the design, specification and commissioning of their own twisted pairs, in the design and commissioning of their own non-conductive acrylic cable \u2018combs\u2019 to maintain a constant distance between the pairs, and in the considerable technical challenge of designing and manufacturing a 7-in-1 plug terminating in an RJ45 connector.<\/p>\n\n\n\n

Nigel Bell could not be certain, before hearing his first fully assembled cable, that all the theoretical advantages would translate into a cable that sounded even better than his RakuStream+. And yet it did! Like all Reiki Audio cables, the JundoStream Reference is assembled, tested and packaged in the brand\u2019s workshops in central England. The JundoStream manufacturing process relies on skilled people rather than machines and is as laborious as you can imagine. It is a labour of love, and the sonic results speak for themselves.<\/p>\n\n\n\n

JundoStream cables are available in white and black; delivery times are typically 1-2 weeks. Standard lengths for both are 1m, 1.5m and 2m; if you require a custom length, you will need to ask your dealer.<\/p>\n\n\n\n

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THE SOUND OF THE REIKI JUNDOSTREAM REFERENCE<\/h2>\n\n\n\n

Compared to a very good Ethernet cable that we know well, and which is already quite expensive, the JundoStream Reference immediately stood out for its impressive silence. We have all experienced significant differences in streaming performance on the same system with different cables: that feeling of going from mediocre to excellent. With the JundoStream Reference, the difference is similar, and permanent.<\/p>\n\n\n\n

A good protocol becomes excellent. The signal-to-noise ratio is of course improved, offering a much better level of dynamic contrast, but that\u2019s not all. This feeling of \u00abfull\u00bb silence is a decisive gain, as is the increase in bandwidth both upwards and downwards. Harmonic richness is the big winner with the arrival of the JundoStream Reference in the system. Voices become velvety and extremely natural in tone. Acoustic instruments also stand out with beautiful tension and much more controlled velocity in their melodic playing. The result is a more human, less mechanical listening experience. As for the image, it seems \u00abunshackled\u00bb, freed from somewhat stifling physical barriers. The sensation of entering a fully holographic universe is quite exhilarating.<\/p>\n\n\n\n

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OUR CONCLUSION<\/h2>\n\n\n\n

The JundoStream Reference is a surprising complement to the SuperSwitch and its separate power supply, which we tested in our previous issue (VUm\u00e8tre #61). Together, they form a mature ecosystem with unusual transparency in terms of Ethernet connection processing. This is an essential combination for any serious network playback enthusiast, significantly enhancing the performance of your system.<\/p>\n\n\n\n

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Auteurs <\/strong>: Laurent Thorin<\/p>\n\n\n\n

Fiche technique : REIKI Jundostream Reference<\/strong><\/h2>\n\n\n\n