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Metnoc

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  1. Bought a D-LINK GO-SW-16G 16-PORT GIGABIT switch just for fun, I've posted about it just a couple of days ago. I've put it between my roon core and endpoint, as a cheap "reclocker" if you will. Tried powering it with a sbooster linear psu, it makes it sound more "analogue" as in some roughness is gone. However you also lose some snappiness. I'll get a proper hifi switch some time in the future, got other hifi priorities now. Digital signal chain: Router -> Supra cat8 -> switch 1 (a "regular" 8 port with standard psu) -> supra - > roon core server ethernet port 1 -> Supra from roon core server ethernet port 2 -> D-Link GO‑SW‑16G, port 1 -> Supra from D-Link GO‑SW‑16G, port 16 -> endpoint.
  2. This is common knowledge in this forum and I've tried it before but it's worthwhile to repeat some things. I've made some change changes to my stereo so I wanted to try different cpu frequencies for the roon server again. Well, if I increase the cpu frequency on the server it sounds more dynamic, and if I lower it the sounds becomes a little more "cozy", but the bass is too thick, it's not at all tight. The lower frequency sounds just wrong. I certainly prefer using bit sum - process lasso power scheme, which forces the frequency higher. The base frequency of the cpu is 2,20 ghz, now it hovers around 3,40 ghz.
  3. I haven't taken the plunge yet in investing in a hifi switch, however I thought I should test another regular switch. I'm not an engineer but, my thinking is that a switch with more ports and than the usual 8 or so might sound better, because it might need better CPU? in order to be able to handle all those ports. Well, I bought a D-Link GO‑SW‑16G, a switch with 16 ports and a external 12V psu which makes it easy to test other power supplies. My digital chain: Router -> Supra cat8 -> switch 1 (a "regular" 8 port with standard psu) -> supra - > roon core server ethernet port 1 -> Supra from roon core server ethernet port 2 -> D-Link GO‑SW‑16G, port 1 -> Supra from D-Link GO‑SW‑16G, port 16 -> endpoint. So the D-link switch is in effect placed in a direct connection between the server and endpoint. Does it affect sound quality? Yes, I would say it does. The timing is better and the highs get better extension, but perhaps a little bright. However that was out of the box, and I will have it in the system for a couple of weeks and then take it out for more fair comparisons. The mainboard of the D-Link switch, it looks "clean" to my "non-engineer eyes". I could identify two 25 Mhz ethernet clocks. Could someone please the describe the different parts of the mainboard? Thanks.
  4. I can't keep up with all the latest developments in this topic. What's the current ideas regarding the importance of the hardware of roon core server in comparison to the roon endpoint? Would a hifi switch such as Uptone separating the roon core and endpoint machines negate most of the roon core impact on the sound quality? Thanks.
  5. Later than promised but here it is, my take on Farad Super 3. Tried two farad, a 19V for my roon core computer and a 12V for the sms200ultra endpoint. Furutech rhodium fuse for the 19V and Synergistic research blue fuse for the 12V. Both upgraded with Furutech rhodium ac-inlet. Farad level 2 dc copper cables and Farad power cords. In short, the results where kinda similar with farad to both the roon core and endpoint, however a larger impact on the endpoint. Farad sounded liquid, dense and a little dark. It bested the Uptone lps 1.2 for the endpoint, uptone sounded a little thin in comparison. Also tried Audio Linux instead of windows 10 with Fidelizer which I usually use for the roon core computer. Thought maybe that I would prefer AL with Farad PSU, but still enjoy the sound of windows more. AL sounds somewhat thin to my ears.
  6. First update, the sms200u as a roon endpoint is no longer unequivocally an improvement over than just using the usb output from the roon core when supplying the computer with a farad psu rather than the standard psu. Snappier transients with sms but also a “colder” sound and less “analogue”. But this might not come as a surprise to the folks in this forum. The roon core computer is a zotac 620 with a i3-8130U cpu, and no special upgrades such as hifi clocks. Still prefer windows 10 with fidelizer over Audiolinux though, al sounds cleaner but also too thin.
  7. Farad 19v to roon core and 12v to sms200ultra. Will report back in a couple of days on results compared to uptone lps 1.2 and stock psu among other things.
  8. I have the Aqua la scala mk2, it came with Siemens tubes I guess. Have tried brimar nos, mullard nos and jj. JJ - kinda warm and unfocused, bass lose precision. Brimar nos - bass gets way more weight and overall quite warm tone, it as a certain "tube magic" that jj lacks, difficult to pin down but jj sounds more "hifi" in a negative sense. Mullard nos 1962 - more balanced than Brimar, and it has even more of that elusive "tube magic" quality, wonderful.
  9. Just confirmed that I will receive two Farad units for a test. A 12V for my sms200ultra and a 19V for my roon core server. The 12V has Furutech rhodium connector and Synergistic research blue fuse, the 19V Furutech rhodium connector and standard fuse. I have a Uptone lps 1.2 for my endpoint for comparison and the system is of sufficient quality to reveal quite minor differences. Will report back next week. https://faradpowersupplies.com/shop/en/home/42-7761-super3-power-supply.html
  10. Just confirmed that I will receive two Farad units for a test. A 12V for my sms200ultra and a 19V for my roon core computer. The 12V has Furutech rhodium connector and Synergistic research blue fuse, the 19V Furutech rhodium connector and standard fuse. I have a Uptone lps 1.2 for my endpoint for comparison and the system is of sufficient quality to reveal quite minor differences. Will report back next week.
  11. I've taken inspiration from Romaz post and tested setting different frequencies for the CPU on my Roon core. I've done this before, but recently I've done a few changes in my system and wanted to try it again. I have a Zotac CI620 nano computer with an Intel Core i3-8130U (dual-core 2.2GHz, up to 3.4GHz) processor for my Roon core, the endpoint is a sms200ultra. I run windows 10 (thought that it sounded better than Audiolinux last time I've tested) with Fidelizer in purist/streamer mode. I've tried setting the CPU frequency to 1,5. 1,7. 2,1 GHz (setting of 99% of max frequency gets you the highest possible steady frequency, when I put it on 100% I get +2,1 and over, which is turbo mode up to 3,4ghz) and +2,1 GHz (2,1 - 3,4 GHz). I do this by changing the minimum frequency in windows power settings and keeping the maximum frequency at 0%. This forces the CPU to stay at the selected frequency. You can see this in the picture, 71% of max frequency equals 1,5 GHz on this particular CPU model. Well does it affect the sound quality? I'm inclined to say yes. Its difficulty with these things, because it's not a massive difference. Romaz wrote: "As you go up in frequency, dynamics improves but it is at the expense of subtlety and nuance and at some point, harshness will set in." My results seem to be in line with his statement. +2,1 GHz setting gives a more open sound, the voices seem to take on a larger space. As I go down in frequency the sounds seem to become somewhat restricted in terms in terms of vertical spread. I feel like raising the volume to get that enveloping soundstage that the higher frequency gives. It seems to be a slight difference between 99 and 100%, the 99% might be a touch calmer but 100% gives more of the things mentioned above in terms of soundstage size. If I go down to 1,5 GHz the sound becomes more "vinyl-like", with a certain organic touch that's missing when setting the CPU to higher frequencies. This might be equivalent to Romaz "subtlety and nuance" remark. I won't overemphasize these differences, they are subtle and preconceived notions of what to expect might play a role here. However, I think there is a case to be made for the servers CPU frequency affects the sound quality. It would be interesting to get a high-quality PSU for my Roon core, I'm quite intrigued by the Farad PSU. Right now I'm using the PSU that came with the computer. I want to thank Romaz for his contribution to streaming audio, he's inspired me to do some tests and his insights has certainly been helpful. In conclusion, I prefer 100% max frequency, it might be a touch noisier and it lacks some "organic" qualities but the more open soundstage makes up for it. It's difficult to go back to lower frequencies when I've heard the 100% setting because of those sounds somewhat restrictive. When I did this test a couple of months ago I preferred the 1,5 GHz setting, but since then I've made a couple of changes. For example an I've bought an M-way 2DW gold power cord for my DAC, a power cord that sounds quite warm (as in "classical copper warmth", it has Iego red copper connectors). Which makes me less dependant on having to alter other things to get a certain "cozy" sound I oftentimes prefer. My experience is that power cords have a quite fundamental effect on tonality, I've for example have had Crystal power cords. It certainly made my stereo sound different.
  12. I'm planning to try: Wall outlet 1 -> standard power distributor -> first outlet of the power distributor -> dc-blocker-> hifi power cord -> hifi power distributor -> dac and amp. -> outlets 2-4 on the standard -> digital components. Perhaps not optimal either, but the fact is that the digital components disturb my amp and dac.
  13. Did some quick confirmation tests, I have done most of these before. 1. With a sms200ultra as roon endpoint, comparing my usual roon core a passively cooled computer with bridged ethernet output (it has two ethernet ports) with using my mac mini which is situated in another room. The mac mini loses out on timing, putting the mac mini to the same switch as sms200ultra sounds better. 2. Playing files from the internal SSD drive sounds better than playing the same files from an external usb hard disk with my standard roon core. 3. Isolating my amp and dac from the switch, roon core and uptone lps 1.2 sounds better. I use wall outlet nr 1 -> standard power cable -> dc-blocker -> hifi power cord -> only dac and amp in hifi power strip. wall outlet nr 2 -> standard power strip with built in power cord - > switch, roon core, uptone lps 1.2 If I just change the switch PSU, a ifi ipower from the standard power strip to the hifi power strip it sounds worse. The ifi iPower seems to pollute the dac and amp.
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