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Post by lobalwarming on Dec 20, 2017 6:10:23 GMT
the LPS for the DAC will work fine. The Horizon needs a more beefy one for sure to accomodate for the start-up current. HD650 and warm, not very tight bass/mids .... check. How the hell did lobalwarming end up with prototype shots of the never to be released power supply ? From the foreign looking gentleman with the glowing briefcase. |
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Post by mvneufeld on Dec 20, 2017 19:09:32 GMT
If anyone is wondering why I bought an LPS for the DAC and not for the Horizon (besides cost), after sniffing around the internets I determined that a regulated linear power supply would isolate the USB connection to the DAC, which would be one of my main sources of potential noise. (Galvanical isolation? But maybe that's only important if the DAC would be getting power from the USB? Not sure...) This was pretty much a wild guess because when it comes to electronics I'm am ignoramus groping in the dark. Well, not completely in the dark, for you are my trusty guides. I'll let you all know if it makes any difference next month, when the thing arrives from Shenzhen.
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Rabbit
Administrator
Posts: 7,091
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Post by Rabbit on Dec 20, 2017 20:09:24 GMT
the LPS for the DAC will work fine. The Horizon needs a more beefy one for sure to accomodate for the start-up current. HD650 and warm, not very tight bass/mids .... check. How the hell did lobalwarming end up with prototype shots of the never to be released power supply ? From the foreign looking gentleman with the glowing briefcase.  |
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Post by mvneufeld on Dec 20, 2017 22:36:32 GMT
Waiting for someone to tell me how wrong I am - you all are so polite! What kind of forum is this?
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Post by ronzo56 on Dec 20, 2017 23:49:09 GMT
Different. Just old fashion politeness from a slightly older generation.  Just a thought. The Schiit Eitr proves galvanic isolation. Does your DAC have a coax/spdif input? If so you could use the Eitr for the DAC. Only question is if your LPS will work with the Horizon. If you can give the technicals on it Frans can tell you. |
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Post by lobalwarming on Dec 20, 2017 23:54:48 GMT
Waiting for someone to tell me how wrong I am - you all are so polite! What kind of forum is this? It's a civilized forum from a different era. No worries tho - in 15-20 years expect it will have caught up to the mainstream internet noise forums of circa 2010. We ask you, politely, to please wait another decade or so to receive a politely insulting barb about your subjective viewpoint which is only wrong if the viewpoint no longer serves your auditory preferences. Besides - it's not like you have waxed poetic about the virtues of the 12BH7 tubes which to my ears are hard, harsh and make listening to music a joyless task compared to the sublime natural sound of the 6SN7 family.  Unlike luckbad who extols their sound without consideration to my delicate sensibilities ;-) I joined this forum, not only because it is civil and informative, but because most here are in the headphone hobby for enjoyment, not to win silly arguments about personal preferences on the internet. We have Head-fi & SBAF for that. |
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Post by lobalwarming on Dec 20, 2017 23:55:42 GMT
Different. Just old fashion politeness from a slightly older generation. Who you calling old, you little whippersnapper?! |
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Post by ronzo56 on Dec 21, 2017 0:00:28 GMT
Waiting for someone to tell me how wrong I am - you all are so polite! What kind of forum is this? It's a civilized forum from a different era. No worries tho - in 15-20 years expect it will have caught up to the mainstream internet noise forums of circa 2010. We ask you to politely to wait another decade or so to receive a politely insulting barb about your subjective viewpoint which is only wrong if the viewpoint no longer serves your auditory preferences. Besides - it's not like you have waxed poetic about the virtues of the 12BH7 tubes which to my ears are hard, harsh and make listening to music a joyless task compared to the sublime natural sound of the 6SN7 family. Unlike luckbad who extols their sound without consideration to my delicate sensibilities ;-) I joined this forum, not only because it is civil and informative, but because most here are in the headphone hobby for enjoyment, not to win silly arguments about personal preferences on the internet. We have Head-fi & SBAF for that. I like the 12BH7'S in the Horizon III. They are harsh hard etc. when they are cold. Especially if they are NOS. Never was much of a believer in tubes needing to break back in after sitting decades. But I think there may be something to it. |
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Post by ronzo56 on Dec 21, 2017 0:04:10 GMT
Different. Just old fashion politeness from a slightly older generation. Who you calling old, you little whippersnapper?! Thanks lobal. Haven't been called whippsnapper since I hit 60 a couple of years ago. BTW, whoever said 60 is the new 40, is 32 years old. |
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Post by lobalwarming on Dec 21, 2017 0:12:22 GMT
In my Solstice, all my NOS 12BH7s (RCA chrometops, Sylvanias & CBS) after 20-30 hours were only marginally less harsh. Don't have the patience to wait any longer. Not when my NOS 6SN7s/12SN7s/12J5s can be lush, spacious and sweet in only a few hours of 'on' time. Maybe I'll leave them running for a week when I'm away and return to discover a sonic miracle of round plate proportions. Or they sound the same but have tufts of cat fur on them, because all audio devices of merit are meant to serve the feline listeners nappers. |
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Post by ronzo56 on Dec 21, 2017 0:23:37 GMT
I wouldn't waste my time. Probably just a difference between the Horizon and Soltice. Glad to hear you hear a difference in your NOS tubes with a little resurrection time. The CBS NOS 5692’s needed it to get rid of static in one channel as did a GE 12BH7. Wonder what the physics is behind it?
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Post by lobalwarming on Dec 21, 2017 1:47:57 GMT
One of my TS RPs needed about 10+ hours to reduce noise too. The other one was quiet within a few minutes. We're listening to snowflakes. LOL! I've been told that old NOS tubes need some gentle wake up time (like their owners) of the cathode to strip off the oxidized layer of barium on the cathode and get down to the strongly emitting layers of cathode emulsion. (like their owners). Altho...there shouldn't be much if any oxygen in a 'vacuum' tube. Otherwise it's a leaky tube and the magic electron cloud can't work it's magic. But...tubes are electro-mechanical and electo-chemical devices, so they get special narratives compared to those boring, unchanging solid state devices. |
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Post by ronzo56 on Dec 21, 2017 3:12:56 GMT
One of my TS RPs needed about 10+ hours to reduce noise too. The other one was quiet within a few minutes. We're listening to snowflakes. LOL! I've been told that old NOS tubes need some gentle wake up time (like their owners) of the cathode to strip off the oxidized layer of barium on the cathode and get down to the strongly emitting layers of cathode emulsion. (like their owners). Altho...there shouldn't be much if any oxygen in a 'vacuum' tube. Otherwise it's a leaky tube and the magic electron cloud can't work it's magic. But...tubes are electro-mechanical and electo-chemical devices, so they get special narratives compared to those boring, unchanging solid state devices. But it makes sense. The vacuum isn’t zero inside the tube. So a even a small amount of oxygen over decades might cause this reaction. They weren’t designed for this use after all. I’m running an experiment on a 12BH7 with horrible static in one channel. Going to let it cook overnight. See what happens. Lab write to come. |
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Post by lobalwarming on Dec 21, 2017 4:23:27 GMT
Cool. I'll prep the grant application in case we need a few cases of TS RPs to develop a statistically valid paper - For Science!
Good point about the vacuum not being as vacuous as most audiophile mythologies - not that I'm saying anything bad or impolite about any mythologies or audiophiles - that myths the point.
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Post by mvneufeld on Dec 21, 2017 4:52:57 GMT
When I first started listening to 6SN7s I thought the sizzling and popping was just part of the experience, and I wasn't sure I liked it. But after a few days the tubes settled down and now they very quiet - once I adjust the bias.
Lobalwarming, every time you mention 12SN7 tubes I get just a little jealous of you and your Solstice. I think you do it on purpose...
Man, I don't know exactly what happened but in the last day or so everything has come together, and my music sounds sooo good. It's like all the new equipment - headphones, DAC, tubes - finished burning and just fell together in beautiful harmonious synergy. It was so good this evening I finally let my wife listen. Played some Charlie Haden & Pat Metheny for her and she was duly impressed.
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