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  1. #51
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    Re: Do I really need an " Audio Grade Network Switch "?

    I auditioned the Innuos Phoenix Net. I tried it on either side of a Roon Nuc+ and couldn't detect a difference...
    Buckeye Farmboy translocated to Boulder. Master and slave to my 8 year old twins
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  2. #52
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by rbbert View Post
    As noted, Internet streamed tracks can't really be buffered into RAM before play, which I suspect is part (but probably not all) of the reason they don't sound as good.
    That's not true when using Aurender N20 or N30.

  3. #53
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Puma Cat View Post
    That's not true when using Aurender N20 or N30.
    I wasn’t quite accurate in my statement. My player will load one track at a time (from a streaming service) into RAM, then after that will load the next track during the first few seconds of the first track playing, so it is always playing from RAM. From local storage I can load 8 GB into RAM before playing any of it. Whether that small amount of extra processor use makes any difference I don’t know (or really care, I can’t change it).
    Rob
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  4. #54
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by W9TR View Post
    Any audible improvement by using a switch, optical break, etc. will not be due to the primary purpose of the device. That’s well understood.

    It will be a secondary effect, most likely the reduction/elimination of electrical noise that ends up inducing jitter in the upsampler/DAC.

    Jitter measurement is a well known and solved problem, yet manufacturers of these switches cables and isolation devices have yet to show that their devices quantitatively reduce jitter. It’s crickets out there, apart from a hand-waving white paper from one popular device manufacturer.

    It’s too bad, because enough people whose opinions I value are hearing differences. Are these differences in these individual’s cerebral cortexes?
    So, well ... Yes.

    For a splash of reality watch Amir's commentary ...

    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  5. #55
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by preston8452 View Post
    I think it's been a quite controversial topic for years, like what's the difference between normal network switch and an audio grade network switch, the price difference is certainly obvious though...
    Anyway, I've done some researches, most audio reviewers say that under this " new digital streaming era " that an network switch is a must for an audio system, which is understandable for me, I mean because if I wanna play TIDAL or Qobuz or Spotify, I gotta use network so I can stream these online services, so yeah I get that if the network quality is good enough, it can possibly level up the music performance.

    But anyhow, I'm new to this area, so I don't like to spend big bucks on my first purchase hahaha... there's a very wide range of the prices though, the top one is Ansuz Power Switch I think, the inner circuit and design look pretty sharp, and surely over my budget lol

    So I'm choosing between Bonn N8 and SW-8, these two both got good reviews, and the prices seem so darn much friendly to me as I'm looking for an entry level switch now, do any of you have any insights to share?
    or should I just go for the higher level ones?

    Best,
    Probably this is your best bet in a network switch ... Amazon's 'Choice'

    Watch Amir's commentary with a typical set of measurements of an "audiophile" switch ...

    https://www.amazon.com/NETGEAR-5-Por...ip%2C78&sr=1-5

    ... So much snake oil and audiophile sucker bait.
    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  6. #56
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    Probably this is your best bet in a network switch ... Amazon's 'Choice'

    Watch Amir's commentary with a typical set of measurements of an "audiophile" switch ...

    https://www.amazon.com/NETGEAR-5-Por...ip%2C78&sr=1-5

    ... So much snake oil and audiophile sucker bait.
    Have you tried one in your system, Melco S100 definitly helped improving my streaming performance, very , very close now to local HDD and CD transport.
    So easy to just dismiss what a product does.
    Moon 700i V2, YG Acoustics Hailey, Aurender N10, dCS Rossini, Oppo BDP103D (audiopraise board), Ansuz Mainz 8 D2

  7. #57
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by imprezap2 View Post
    Have you tried one in your system, Melco S100 definitly helped improving my streaming performance, very , very close now to local HDD and CD transport.
    So easy to just dismiss what a product does.
    Well, the Melo cost Cdn$3500. Not a lot, I take it, for some Audio Shark members. But in my case fort he kind of money my audio priority would be elsewhere -- even assuming assuming the Melo effected some small improvement.

    Did you view the ASR video I linked? What do you think of that?

    Personally over my 50 years interest in hi-fi I've learned to take one-off personal testimonials with a great deal of skepticism.
    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  8. #58
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    Re: Do I really need an " Audio Grade Network Switch "?

    I am audiophile switch ‘curious’ and have found some significant improvements using an optical break powered on the receiving end by a low noise power supply. With the help of Kelly, I did a 50 trial blind test and picked the optical break as being preferred in 48 of 50 trials. So there may be a pony in this audiophile switch business.

    Next month, I’m planning to test an audiophile network switch using the same methodology. Should be fun.
    Tom

    Audio:
    Amati Futura Mains
    Amati Homage VOX Center,
    Proac Response 1sc Rears,
    Three MC2301's for L,C,R
    MC 602 for the rears
    C 1100, MX 151, MCD 1100, MR 77
    Nottingham Dais with Sumiko Palo Santos Presentation
    SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

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    Ohm F, MC 275V, C2300, MR 80, Rega P3

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  9. #59
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    Well, the Melo cost Cdn$3500. Not a lot, I take it, for some Audio Shark members. But in my case fort he kind of money my audio priority would be elsewhere -- even assuming assuming the Melo effected some small improvement.

    Did you view the ASR video I linked? What do you think of that?

    Personally over my 50 years interest in hi-fi I've learned to take one-off personal testimonials with a great deal of skepticism.
    I take ASR's "findings" with an equal degree of skepticism. As they say, GIGO, and that isn't even addressing the relevance of their measurements to audio perception.
    Rob
    __________________________
    Tascam BR-20; Technics 1506 with tape path upgrades, FM head and custom repro amp; Modwright Oppo 205 full tube mod w/LPS; Euphony Summus server, EtherRegen, HDPLEX LPS; MSB Discrete DAC (dual PS, ISLPro, balanced out); Pass Labs INT60; Daedalus Audio Apollo 11’s
    REL S3 (Kimber Kable connection); Daedalus/Wywires, Acoustic Zen, Sablon Audio cables; Core Power Equi=Power 1800 Mk3;
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  10. #60
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by rbbert View Post
    I take ASR's "findings" with an equal degree of skepticism. As they say, GIGO, and that isn't even addressing the relevance of their measurements to audio perception.
    ASR isn't above criticism, granted. However I believe that equipment measurements, including theirs, do have some correlation with subjective impressions. That is, unlike many audiophiles I don't dismiss measurements out of hand.

    So for example, while hardcore ASR members tend to see lowest THD+noise as always the best, I believe that harmonic distortion profiles are very important. Simply put, quite high 2nd and 3rd order harmonics not only benign but are actually preferred by a majority of audiophile -- whether they are aware of it or not. They are not likely to be aware of it if they totally ignore measurements.
    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  11. #61
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by W9TR View Post
    I am audiophile switch ‘curious’ and have found some significant improvements using an optical break powered on the receiving end by a low noise power supply. With the help of Kelly, I did a 50 trial blind test and picked the optical break as being preferred in 48 of 50 trials. So there may be a pony in this audiophile switch business.

    Next month, I’m planning to test an audiophile network switch using the same methodology. Should be fun.
    48/50 in blind test is certainly an impressive result and strongly suggests real improvement.

    Does an "optical break" involve a digital => optical => digital conversion? What would be the nature of the improvement it would produce: lower noise? Lower jitter? Either way, it would almost certainly result in a measurable difference. Does the provider of the optical break device provide any documented measurements?
    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  12. #62
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    Probably this is your best bet in a network switch ... Amazon's 'Choice'

    Watch Amir's commentary with a typical set of measurements of an "audiophile" switch ...

    https://www.amazon.com/NETGEAR-5-Por...ip%2C78&sr=1-5

    ... So much snake oil and audiophile sucker bait.
    I don't put any credence into any Youtube videos.
    Jim

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  13. #63
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    ASR isn't above criticism, granted. However I believe that equipment measurements, including theirs, do have some correlation with subjective impressions. That is, unlike many audiophiles I don't dismiss measurements out of hand.
    So it is still (essentially) a matter of faith. It doesn't help that ASR is misnamed (there is no "science" at the site, only some engineering and technical measurements).

    I suspect few of us dismiss measurements out of hand, anymore than we dismiss subjective impressions out of hand. Context and application are important in either case.
    Rob
    __________________________
    Tascam BR-20; Technics 1506 with tape path upgrades, FM head and custom repro amp; Modwright Oppo 205 full tube mod w/LPS; Euphony Summus server, EtherRegen, HDPLEX LPS; MSB Discrete DAC (dual PS, ISLPro, balanced out); Pass Labs INT60; Daedalus Audio Apollo 11’s
    REL S3 (Kimber Kable connection); Daedalus/Wywires, Acoustic Zen, Sablon Audio cables; Core Power Equi=Power 1800 Mk3;
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  14. #64
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by still-one View Post
    I don't put any credence into any Youtube videos.
    Really? I have found some quite helpful for DIY home repairs (including advice about when to call a professional).
    Rob
    __________________________
    Tascam BR-20; Technics 1506 with tape path upgrades, FM head and custom repro amp; Modwright Oppo 205 full tube mod w/LPS; Euphony Summus server, EtherRegen, HDPLEX LPS; MSB Discrete DAC (dual PS, ISLPro, balanced out); Pass Labs INT60; Daedalus Audio Apollo 11’s
    REL S3 (Kimber Kable connection); Daedalus/Wywires, Acoustic Zen, Sablon Audio cables; Core Power Equi=Power 1800 Mk3;
    Adona rack, ​​​​​Stillpoints, IsoPods, ASC, GIK Acoustics accessories

  15. #65
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by rbbert View Post
    So it is still (essentially) a matter of faith. It doesn't help that ASR is misnamed (there is no "science" at the site, only some engineering and technical measurements).

    I suspect few of us dismiss measurements out of hand, anymore than we dismiss subjective impressions out of hand. Context and application are important in either case.
    FWIW, there are many highly knowledgeable and experienced audio electronics engineers who frequent the site. Granted, few are psychoacoustical scientists.
    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  16. #66
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    48/50 in blind test is certainly an impressive result and strongly suggests real improvement.

    Does an "optical break" involve a digital => optical => digital conversion? What would be the nature of the improvement it would produce: lower noise? Lower jitter? Either way, it would almost certainly result in a measurable difference. Does the provider of the optical break device provide any documented measurements?
    Yes, it is a digital/optical/digital device that converts wired Ethernet to optical Ethernet and back to wired.

    The purpose is to prevent noise from upstream Ethernet switches, cables, and other networking components from entering my audio system via grounds, power supplies, and capacitive coupling across networking isolation transformers.

    The provider does not include measurements - this is not an audio/audiophile product, it is a networking product. I have not done any end to end measurements. I’m satisfied the blind testing I did is sufficiently robust for me to keep the device(s) in my system.
    Tom

    Audio:
    Amati Futura Mains
    Amati Homage VOX Center,
    Proac Response 1sc Rears,
    Three MC2301's for L,C,R
    MC 602 for the rears
    C 1100, MX 151, MCD 1100, MR 77
    Nottingham Dais with Sumiko Palo Santos Presentation
    SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

    Video:
    MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.

    Lake House:
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  17. #67
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by W9TR View Post
    Yes, it is a digital/optical/digital device that converts wired Ethernet to optical Ethernet and back to wired.

    The purpose is to prevent noise from upstream Ethernet switches, cables, and other networking components from entering my audio system via grounds, power supplies, and capacitive coupling across networking isolation transformers.

    The provider does not include measurements - this is not an audio/audiophile product, it is a networking product. I have not done any end to end measurements. I’m satisfied the blind testing I did is sufficiently robust for me to keep the device(s) in my system.
    Interesting. Can you mention the make & model and a seller?
    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  18. #68
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    Re: Do I really need an " Audio Grade Network Switch "?

    I had similar results (perceptive improvement) using the Blackbox Flexpoint fiber media converters on both ends, OM3 LC-LC multimode fiber (nobody better say it makes more sense to use single mode - unless you’re going like between houses or something), with a short “high quality” ethernet cable at the audio end. Fwiw when I bought that ethernet cable it was advertised as “Cat 8” which was complete bullshit since no such standard had even been proposed at that point. Nonetheless I fell - I mean, went - for it and was happy with the results.

    I haven’t been full ethernet in years, and now I am fiber from the switch to the X1, but haven’t a/b’d it with a long ethernet run.

    Could I hear the difference? Who knows. But in my case at least, fiber was easier to run, and since it’s impervious to environmentals along the way, I figured I’d just keep it how it is.

    I was always of the mind of the ASR guy and coming from a network engineering background it makes sense to me. Between the fact that the original and end states are just 0s and 1s, and in between you have TCP/IP which handles errors (visibly), re-transmissions etc, I just thought, “it either gets there or it doesn’t”. But you guys got me all turned around so now I tend to think there’s probably a gap in my knowledge/theory and things like EtherREGEN prevent or fix problems I just don’t understand well.

    Meh, end of the day I’m probably willing to drop 600 to experiment with it, once everything else is dialed in where I want it, but certainly not 3500…. There simply isn’t 3500 worth of engineering spend or parts represented imo. But again, wtf do I know.
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  19. #69
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    Interesting. Can you mention the make & model and a seller?
    TP-Link Fast Ethernet SFP to RJ45 Fiber Media Converter (MC100CM). You need 2 and the matching SFP cable. I power the streamer end with a linear power supply.
    Tom

    Audio:
    Amati Futura Mains
    Amati Homage VOX Center,
    Proac Response 1sc Rears,
    Three MC2301's for L,C,R
    MC 602 for the rears
    C 1100, MX 151, MCD 1100, MR 77
    Nottingham Dais with Sumiko Palo Santos Presentation
    SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

    Video:
    MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.

    Lake House:
    Ohm F, MC 275V, C2300, MR 80, Rega P3

    OnDeck:
    McIntosh MAC 4300v

  20. #70
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by jmusica View Post
    I had similar results (perceptive improvement) using the Blackbox Flexpoint fiber media converters on both ends, OM3 LC-LC multimode fiber (nobody better say it makes more sense to use single mode - unless you’re going like between houses or something), with a short “high quality” ethernet cable at the audio end. Fwiw when I bought that ethernet cable it was advertised as “Cat 8” which was complete bullshit since no such standard had even been proposed at that point. Nonetheless I fell - I mean, went - for it and was happy with the results.

    I haven’t been full ethernet in years, and now I am fiber from the switch to the X1, but haven’t a/b’d it with a long ethernet run.

    Could I hear the difference? Who knows. But in my case at least, fiber was easier to run, and since it’s impervious to environmentals along the way, I figured I’d just keep it how it is.

    I was always of the mind of the ASR guy and coming from a network engineering background it makes sense to me. Between the fact that the original and end states are just 0s and 1s, and in between you have TCP/IP which handles errors (visibly), re-transmissions etc, I just thought, “it either gets there or it doesn’t”. But you guys got me all turned around so now I tend to think there’s probably a gap in my knowledge/theory and things like EtherREGEN prevent or fix problems I just don’t understand well.

    Meh, end of the day I’m probably willing to drop 600 to experiment with it, once everything else is dialed in where I want it, but certainly not 3500…. There simply isn’t 3500 worth of engineering spend or parts represented imo. But again, wtf do I know.
    This stuff is super easy to blind test with an assistant. I'd buy only with a money back return option.
    Tom

    Audio:
    Amati Futura Mains
    Amati Homage VOX Center,
    Proac Response 1sc Rears,
    Three MC2301's for L,C,R
    MC 602 for the rears
    C 1100, MX 151, MCD 1100, MR 77
    Nottingham Dais with Sumiko Palo Santos Presentation
    SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

    Video:
    MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.

    Lake House:
    Ohm F, MC 275V, C2300, MR 80, Rega P3

    OnDeck:
    McIntosh MAC 4300v

  21. #71
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    FWIW, there are many highly knowledgeable and experienced audio electronics engineers who frequent the site. Granted, few are psychoacoustical scientists.
    It is a common misconception that engineering is a science; it's not, in its simplest terms it's the practical application of science. However, engineering and engineers also make frequent use of empirical information which is emphatically not science.

    Unsurprisingly there is very little true scientific evidence (even "low-grade") about much of anything relevant to what audiophiles care about. There is a growing body of data (not evidence, merely observations) about what parts of the brain increase activity when listening to music, and how the degree of activity might correlate with subjective listening pleasure, but again that is not likely to be very relevant to telling us which audio components are "best" except to the specific listener. At this time we are frequently left with nothing better than empirical observations about sound quality, not too dissimilar to what engineers often use in designing audio components (hmmm).

    Too many people make the mistake of assuming that if there is a lot of data gathered through technological means that it must somehow be meaningful.
    Rob
    __________________________
    Tascam BR-20; Technics 1506 with tape path upgrades, FM head and custom repro amp; Modwright Oppo 205 full tube mod w/LPS; Euphony Summus server, EtherRegen, HDPLEX LPS; MSB Discrete DAC (dual PS, ISLPro, balanced out); Pass Labs INT60; Daedalus Audio Apollo 11’s
    REL S3 (Kimber Kable connection); Daedalus/Wywires, Acoustic Zen, Sablon Audio cables; Core Power Equi=Power 1800 Mk3;
    Adona rack, ​​​​​Stillpoints, IsoPods, ASC, GIK Acoustics accessories

  22. #72
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by W9TR View Post
    TP-Link Fast Ethernet SFP to RJ45 Fiber Media Converter (MC100CM). You need 2 and the matching SFP cable. I power the streamer end with a linear power supply.
    Thanks for that info.
    ~ Bill

    Win10/Foobar2000 => Topping D90 DAC => Sonic Frontiers Line 1 SE+ preamp => VTV Purifi 1ET400A stereo amp with Sparkos SS3602 op amps => Zaph Audio ZRT speakers (DIY) + PSB Subsonic 5 subwoofer

  23. #73
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by rbbert View Post
    It is a common misconception that engineering is a science; it's not, in its simplest terms it's the practical application of science. However, engineering and engineers also make frequent use of empirical information which is emphatically not science.

    Unsurprisingly there is very little true scientific evidence (even "low-grade") about much of anything relevant to what audiophiles care about. There is a growing body of data (not evidence, merely observations) about what parts of the brain increase activity when listening to music, and how the degree of activity might correlate with subjective listening pleasure, but again that is not likely to be very relevant to telling us which audio components are "best" except to the specific listener. At this time we are frequently left with nothing better than empirical observations about sound quality, not too dissimilar to what engineers often use in designing audio components (hmmm).

    Too many people make the mistake of assuming that if there is a lot of data gathered through technological means that it must somehow be meaningful.
    I agree with you that engineers, (and medical doctors), are rarely scientists.

    In fact too many ASR denizens are hard-core dogmatic sound difference deniers. Their constant, annoying refrain whenever someone, (say like me), dares to post an impression is "But can you prove that? Have you performed a systematic blind test?"

    First, I believe that the standard ABX test simply does not give the listener to opportunity to appreciate differences that actually exist. Although note: large scale AB testing has demonstrated that some people CAN tell the difference between some specific amplifiers at well above random chance -- a fact glossed over by the deniers.

    However secondly, I don't depreciate equipment testing because I DO believe that there is a correlation between measurements and subjective impressions. E.g. That 2nd/3rd order harmonic distortion is not only benign but agreeable, and that most audiophile prefer a little of it over the lowest possible THD. This is why I visit ASR at all.
    ~ Bill

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  24. #74
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    Re: Do I really need an " Audio Grade Network Switch "?

    But note that "belief" is an element of faith, unless supported by evidence

    Although it has been true that the majority of M.D.'s (even though typically educated in science) ignore scientific principles after their didactic training, there is a growing movement to change that

    Emergency Medicine CME | Evidence-Based Excellence | EB Medicine

    Home - 2020 - The Centre for Evidence-Based Medicine

    And the vast majority of medical researchers are scientists by almost any definition.
    Rob
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  25. #75
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    Re: Do I really need an " Audio Grade Network Switch "?

    Here's an interesting tidbit for your reading pleasure. Not completely aligned with the subject of Ethernet switch audibility, but does address some of the more objectivist claims of cable inaudibility by testing a balanced cable with an unbalanced one driving the balanced and unbalanced inputs of an amplifier. It does highlight how challenging this type of listener-centered testing is to pull off.

    http://boson.physics.sc.edu/~kunchur...s--Kunchur.pdf

    The ASR 'scientists' crapped all over this one because it doesn't fit their objectivist world view.

    Rob, if you are interested there is an active AES subgroup "Perception and Subjective Evaluation of Audio Signals". There are hundreds of papers of potential interest to audiophiles, many on the subjective evaluation of localization and spatialization in stereo and multi-channel systems.
    Tom

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  26. #76
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    Re: Do I really need an " Audio Grade Network Switch "?

    Yes, but do I have to join AES again? The 2 years I tried that 15+ years ago (using my brother's engineering credentials) were clearly not worth the money.
    Rob
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  27. #77
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    Re: Do I really need an " Audio Grade Network Switch "?

    Some of the papers are in the public domain, though most are not. So if you want to go down the psychoacoustic rabbit hole you’ve got to pay. I’m a member because I’m still doing audio work for some clients. Not sure it’s worth it otherwise. Most of the psychoacoustic papers are related to audio codec performance and testing, but there are quite a few related to things that are of interest to audiophiles, like spatialization, audible effects of jitter, etc.
    Tom

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    Nottingham Dais with Sumiko Palo Santos Presentation
    SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

    Video:
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  28. #78
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    Re: Do I really need an " Audio Grade Network Switch "?

    Some of the papers are in the public domain, though most are not. So if you want to go down the psychoacoustic rabbit hole you’ve got to pay. I’m a member because I’m still doing audio work for some clients. Not sure it’s worth it otherwise. Most of the psychoacoustic papers are related to audio codec performance and testing, but there are quite a few related to things that are of interest to audiophiles, like spatialization, audible effects of jitter, etc.
    Tom

    Audio:
    Amati Futura Mains
    Amati Homage VOX Center,
    Proac Response 1sc Rears,
    Three MC2301's for L,C,R
    MC 602 for the rears
    C 1100, MX 151, MCD 1100, MR 77
    Nottingham Dais with Sumiko Palo Santos Presentation
    SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

    Video:
    MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.

    Lake House:
    Ohm F, MC 275V, C2300, MR 80, Rega P3

    OnDeck:
    McIntosh MAC 4300v

  29. #79
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by rbbert View Post
    But note that "belief" is an element of faith, unless supported by evidence

    Although it has been true that the majority of M.D.'s (even though typically educated in science) ignore scientific principles after their didactic training, there is a growing movement to change that

    Emergency Medicine CME | Evidence-Based Excellence | EB Medicine

    Home - 2020 - The Centre for Evidence-Based Medicine

    And the vast majority of medical researchers are scientists by almost any definition.
    With the exception of medical researchers (many of whom are MD, PhD's) may be accurately categorized as scientists, as someone who spent over 40 years as a molecular biologist with peer-reviewed publications e.g. Science, PNAS, Blood, ASHG Journal, etc., in my professional view, "regular MD's" are highly-trained technicians, but not what I would classify as scientists.

  30. #80
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Feanor View Post
    I agree with you that engineers, (and medical doctors), are rarely scientists.

    In fact too many ASR denizens are hard-core dogmatic sound difference deniers. Their constant, annoying refrain whenever someone, (say like me), dares to post an impression is "But can you prove that? Have you performed a systematic blind test?"

    First, I believe that the standard ABX test simply does not give the listener to opportunity to appreciate differences that actually exist. Although note: large scale AB testing has demonstrated that some people CAN tell the difference between some specific amplifiers at well above random chance -- a fact glossed over by the deniers.

    However secondly, I don't depreciate equipment testing because I DO believe that there is a correlation between measurements and subjective impressions. E.g. That 2nd/3rd order harmonic distortion is not only benign but agreeable, and that most audiophile prefer a little of it over the lowest possible THD. This is why I visit ASR at all.
    The ASR guys have got their head up their collective *ss. One of the foundational misconceptions that they fundamentally operate by is that the 1) the ear is a microphone and 2) the brain is a tape recorder. As we know, nothing could be further the from the truth. Nelson Pass understands this, though, which is why he is working with a neuroscientist on how the brain* "constructs music".

    The "experience" of music is a construct of the brain. All that speakers or a musical instrument do is pressurize the air. They do not do anything else. So does a 2-stroke chain saw. Yet the latter is perceived by the brain as "noise" and Yeol Eum Son playing Mozart's Piano Concerto in C Major, K. 467, as the former, is constructed by our brains as "music".

    This important distinction is what ASR does not acknowledge nor understand.

    *- Another example of the brain is responsible for constructing the experience of "music" is there are folks that have suffered brain damage or injury that have become tone deaf, i.e., they cannot distinguish differences in pitch.

  31. #81
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Puma Cat View Post
    The ASR guys have got their head up their collective *ss. One of the foundational misconceptions that they fundamentally operate by is that the 1) the ear is a microphone and 2) the brain is a tape recorder. As we know, nothing could be further the from the truth. Nelson Pass understands this, though, which is why he is working with a neuroscientist on how the brain* "constructs music".

    The "experience" of music is a construct of the brain. All that speakers or a musical instrument do is pressurize the air. They do not do anything else. So does a 2-stroke chain saw. Yet the latter is perceived by the brain as "noise" and Yeol Eum Son playing Mozart's Piano Concerto in C Major, K. 467, as the former, is constructed by our brains as "music".

    This important distinction is what ASR does not acknowledge nor understand.

    *- Another example of the brain is responsible for constructing the experience of "music" is there are folks that have suffered brain damage or injury that have become tone deaf, i.e., they cannot distinguish differences in pitch.
    Excellent post!
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  32. #82
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Puma Cat View Post
    With the exception of medical researchers (many of whom are MD, PhD's) may be accurately categorized as scientists, as someone who spent over 40 years as a molecular biologist with peer-reviewed publications e.g. Science, PNAS, Blood, ASHG Journal, etc., in my professional view, "regular MD's" are highly-trained technicians, but not what I would classify as scientists.
    Isn't that what I posted (using different phrasing)? What you don't comment on are serious and growing efforts to change that, because basing medicine as much as possible on scientific principles can only help health care (although without a thorough revamping the US health care system will continue circling the drain)
    Rob
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  33. #83
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    Re: Do I really need an " Audio Grade Network Switch "?

    Quote Originally Posted by Puma Cat View Post
    ...The "experience" of music is a construct of the brain. All that speakers or a musical instrument do is pressurize the air. They do not do anything else. So does a 2-stroke chain saw. Yet the latter is perceived by the brain as "noise" and Yeol Eum Son playing Mozart's Piano Concerto in C Major, K. 467, as the former, is constructed by our brains as "music"...
    Although they may not be consciously aware of it, I think most audiophiles know this, as I posted earlier
    Rob
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