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Found 2 results

  1. Ok, MASSIVE is a bit of an overstatement at this level of high-end audio but now that I have your attention, I would say that this improvement is quite significant, nonetheless, and once you hear it, I suspect you will not wish to go back to your previous setup. More importantly, this is neither difficult nor expensive to implement. Much has been said about how ethernet renderers like the microRendu and the sMS-200 are immune to upstream components. Because ethernet is transformer coupled, it is inherently galvanically isolated and because of the error correcting packet protocol it employs, data is always bit-perfect and so it would seem that ethernet is an ideal data delivery vehicle for a digital audio stream. Indeed, when I first purchased my microRendu back in May, I tested it with a variety of standard sources including a Windows NUC, Windows laptop, Mac Pro, Macbook Pro and sonicTransporter and even when a certain source was powered by my HDPlex, I noticed no significant difference among these sources, at least not enough to care which one was feeding my microRendu. I have also explored and compared a variety of ethernet optimization techniques including optical isolation with FMCs (powered by LPS-1), an audiophile switch with TCXO clock by Paul Pang (powered by LPS-1) and various audiophile ethernet cables (BJC CAT 6A, SOtM dCBL-CAT6 with iSO-CAT6, AQ Vodka + Diamond, Supra CAT8, WireWorld Silver Starlight CAT8) and while they can and do make a difference, even collectively, the difference has never been that great, certainly not enough to want to spend lots of effort or money on these things. At least that has been my experience and so this is a compliment to both the microRendu and the sMS-200, that they are that immune to what is upstream...or are they? Like with many of you, things changed when I received my LPS-1 as this power supply was eye opening in how it transformed my microRendu. This should have come as no surprise as John Swenson had been telling us all along that the microRendu, as a low noise and low impedance device, benefits from a low noise and low impedance power supply. What I wasn't prepared to experience, however, was how a good low noise, low impedance power supply would also transform my upstream components including a simple NUC or Mac Mini even with the microRendu or sMS-200 in place (I own both of these units). It was surprising to find out that even my internet modem/router similarly benefited. It turns out that while ethernet is good for isolating noise, it cannot fix a signal already molested at the modem/router or music server level. In the same way that the LPS-1 improved both the macro and microdynamic capabilities of my microRendu, my Paul Hynes SR7 has also magically transformed my modified Mac Mini and internet modem/router and both the microRendu and sMS-200 fully reveal these benefits but truth be told, these benefits are much more fully realized if these endpoints themselves are powered by a low impedance PSU. This is not some mild transformation that you need to blind test to convince yourself is real, this is something a semi-deaf person can distinguish because the dynamic contrasts with the Paul Hynes SR7 driving both my Mac Mini and internet modem/router is that much more thunderous, enough so that I have had to literally turn my subwoofer down a notch. If you think about it, there's no good reason why this shouldn't be happening. The whole purpose of the microRendu or sMS-200 and devices like the USB Regen is to present a DAC with a signal of the highest integrity. Why wouldn't the microRendu or sMS-200 similarly benefit from being presented with high signal integrity by the components before it? I have come to the conclusion that this impact has more to do with low impedance than the low noise characteristics of the power supply fronting these upstream devices because as you recall, ethernet is transformer coupled and so is inherently galvanically isolated and with the FMCs that I employ in my network (which are powered by my LPS-1), no RF noise or leakage current should be reaching my microRendu or sMS-200. What is the measured output impedance of the Paul Hynes SR7? According to Paul, his SR5 and SR7 measure <3 millohms from DC to 100kHz and so consider this number as a reference point for comparison. Having asked around, it seems no one else can provide these impedance measurements over what John Swenson describes to be his ideal frequency range either because they don't own the measuring equipment to do so or because they don't believe this spec is important. What I can tell you is that neither my HDPlex or Teradak are low impedance LPSUs because neither of these units are good enough to allow me to distinguish one source from another when fronted by either the microRendu or sMS-200 and both are soundly trounced by my LPS-1 and my SR7 when it comes to soundstage dimensionality. While I have not had the opportunity to compare the Sonore Signature Power Supply to either of these two units, based on what I am hearing from respected sources and conversations I have had with Barrows, I have no doubt this is an excellent and very low impedance PSU. Based on how good the LPS-1 is, logic would suggest Vinnie Rossi's ultracap-based supply is likely of similar caliber. The problem with these other supplies is that neither of them have enough juice to power a Mac Mini, Nuc or my TP-Link internet modem/router as each of these devices require at least 12V/3.5A. Of course, this discovery led to quite a bit of curiosity about other areas. What would happen if I directly connected my Mac Mini to either my microRendu or sMS-200? Intuitively, I had a hard time believing this should make a difference. If so, why weren't the microRendu or sMS-200 designed by their wise creators to connect this way? I further had a difficult time believing my internet modem/router or my Paul Pang switch with TCXO clock should have any real detrimental impact on either of these endpoints since the modem/router was currently being powered by my Paul Hynes SR7 and my Paul Pang switch was being powered by my LPS-1 and moreover, I had optical isolation in place and yet Mark Jenkins, owner and developer of the Antipodes line of music servers, had this to say about his latest generation Roon Ready DX music server. This excerpt is taken from John Darko's review of this latest generation DX server: "A third way to plumb Roon inside the DX is to have Roon Core talk to Roon Ready directly. Think of this scenario as Roon playing out the server-client model not on a LAN but inside a single computer. Jenkins clarifies: "They [Roon Core and Roon Ready] talk using RAAT but when they are in the same device they do not need to use the not-so-good comms layers that sit underneath RAAT when the two apps talk across a network." I'm not sure I know what Mark meant by this exactly but he details a greater clarity and immediacy to the sound of Roon using this method and so I felt compelled to try and create this direct connection between my Mac Mini and my microRendu/sMS-200. This wouldn't be so difficult if either device had the ability to assign itself a static IP. Unfortunately, this was never possible with the microRendu and this feature was taken away from the sMS-200 after firmware 1.9 and because each device must be assigned an IP address by a router for control purposes, it didn't appear as if there would be an easy way to accomplish this. It turns out OSX can function as its own DHCP server and so I used El Capitan to assign an IP address to one of the two ethernet ports I have on my Mac Mini (the Mac Mini comes natively with only one ethernet port but my Thunderbolt hub comes with its own ethernet port thereby giving me two such ports). I connected my sMS-200 to one port and my router to the other port and it worked but there were problems. Because OSX insisted on connecting this second port on a separate subnet, my sMS-200 had no outlet to the internet (for Tidal streaming) nor could it be controlled remotely by my iPad and so this was a "no go." When I manually forced both ports to be on the same subnet, my Mac Mini would get confused as to which ethernet port had control and it would lock up. It then dawned on me that I could bridge the two ethernet ports and BINGO! This accomplished exactly what I wanted to accomplish. Both ethernet ports were now on the same subnet and with one port connected directly to my sMS-200 and the other port connected directly to my router, everything was running smoothly. I could now easily access the sMS-200 remotely from my iPad and other machines that were on the network and the sMS-200 could access the internet. While I have not yet tried my microRendu this way (it is presently on loan), I don't see why it wouldn't work the same way. What is interesting is with this bridged configuration, my internet modem/router is now responsible for assigning the sMS-200 an IP address and yet the sMS-200 is physically directly connected to my Mac Mini without the intermediary "not so good comm layers" that Mark Jenkins describes. So how does this direct connection sound? Simply glorious! While a low impedance power supply brings depth and dynamics to my upstream components, this direct connection brings amazing clarity and immediacy. It's as if one very thick veil has been removed and that my seat has been upgraded from the balcony to the stalls. I would rate the impact of this as equivalent in magnitude to employing a low impedance PSU. Many of you are aware of the claims many are making on several threads here on CA but also on HeadFi of how RedNet and Dante provides this "you are there" clarity. I had a ReNet 3 in my home for evaluation for nearly a month and I agree, it provides this beguiling sense of clarity that has to be heard to be appreciated although the problem with RedNet, I believe, is its inferior switching PSU. These units sound flat and dimensionless compared to my described setup above and so this clarity that RedNet brings almost sounds sterile and lifeless in comparison. Regardless, proponents of RedNet have suggested the problem with USB endpoints like the microRendu and sMS-200 is with USB. What I am hearing suggests USB is not the problem but perhaps the Dante technology by Audinate that RedNet utilizes has figured out how to eliminate the impact of these "not so good comms" in the network signal path. I have now been listening to this arrangement for much of the past week and so the initial emotions that can cloud one's judgement have settled down and my opinion remains the same as the first moment I heard it. To borrow from Chris Connaker, after all of this, I can unequivocally say that my audio system has never sounded better than it has now. For me, there is no going back. For those interested in reproducing what I have done, first of all, you will need a music server with 2 ethernet ports. Current Mac Pros already have 2 ethernet ports. Mac Minis do not but I can verify that you can add a Thunderbolt ethernet port and it works very well. Many Windows PCs have 2 ethernet ports and if not, if you have a spare PCI or PCIE slot, you could inexpensively add one. Will a USB ethernet connection work? I don't see why not but I haven't tried it and I don't know how it will sound. I do know that you can't bridge a wi-fi connection and an ethernet connection. So how do you bridge 2 ethernet ports? If you are on Linux, I can't help you but I'm sure it's possible. If you are on a Mac, here are the fairly simple instructions that I followed. Feel free to use DHCP but you are also free to assign a static IP: https://support.apple.com/kb/PH18510?locale=en_US For Windows, @jelt2359 has confirmed for me that the following directions below worked on his Windows 10 Nuc although he had to manually configure the bridge's DNS and IP addresses. How to create a Network Bridge in Windows 10/8/7 Obviously, if you decide to try this, please report back your findings here. If there is consensus that this improvement is universal, perhaps Sonore and SOtM can be convinced to allow their units to be configured to be directly accessed more easily.
  2. Hello All I have just ordered a Linear Power supply for my Mac Mini with Paul Hynes. Can some one please advice where I can buy or how I can build a internal DC cable to replace the SMPS and connect to the Linear PSU, either directly or through a suitable Jack. Thanks very much in advance.