Keep noise creators outside your clean power zone
Keep things which generate noise outside of your clean zone.
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Here are the specs, from another piece of gear that uses SMP (Series Mode Protection) and LiFT( Linear Filtering): 40 dB @ 100 kHz 50 dB @ 500 kHz This is not the same device, but the same features. The 10 dB @ 10kHz corresponds, roughly to working down to 3 kHz. Still, either measurement is a lot better than the typical EMI/RFI suppression which usually don't work until 100 kHz |
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Erik, is this a manufacturer claim or has there been some independent testing? I am not doubting it, just curious where the number comes from. @heaudio123 Good question, and I actually had to think about where I got this number from. it's actually inferred from similar technology. Series mode surge suppression needs a big low pass filter to work. That filter is in place at all times, but during a surge additional components get activated. The inference I made, and you are right to ask me about it, was that since surge suppression needs that low pass filter to work, and that other specs are nearly identical to similar series mode surge suppression, then the filter knee should be about the same place. From similar devices which have been measured that point is about 3 kHz. Sorry to have stated such an assertion without actual hands on data. Best, E |
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@tomic601 My memory here is vague, but I think it went through a few versions, and I remember one being really great and another meh. My first exposure was on a Snell A/III, and swapping out the Amber amp for a Tandberg was a real revelation in what a good amp could do with that speaker. Later on, in San Francisco, I got one and it just wasn't the same. Maybe the caps all needed to be replaced? |
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@tomic601 Might have been. Honestly the amp though did not hold up. The 2 Parasound A21s I had were a lot better. That's the other thing, as much as I got rid of, I still had an Oppo BD player, 2 Parasound A21s and a plethora of Class D amps, Focal profiles, and was making my own, and a pair of Monitor Audio profile speakers. |
Man, when I lived in San Francisco I sold all my gear in bulk. Sumo pre/amp, Tandberg pre/amp, Theta Casanova. In a 1 bedroom, that was waaaay too much stuff. Not to mention the speakers I was accumulating. There are children in Azerbaijan whose souls are dying due to lack of Jazz music and here I was hoarding. |
Look what you all doing to miller...it’s only noon and he’s not even reached his average daily quota of 20 posts 😃 https://www.memeatlas.com/images/wojaks/wojak-soy-soi-boi.gif |
E and helomech are quite correct in appending SMPS to Wall wart. Get them on a different leg of your panel IF possible. You can try this w long extension cord and as E says an inexpensive PC the Point about mostly analog devices being self polluted is quite accurate- ARC and Aesthetix both recognized this and make the display defeatable - quite audible. finally to help answer Miller’s question about where the clean/ dirty line is - anybody who puts a resonant tonearm in a corner on purpose has no clean line... |
A wall wart is nothing but a very simple power supply. Its a transformer, couple diodes, maybe a cap or two. That’s it.That makes as much sense as saying "all amplifiers sound the same" For $75 to $100 or so, one can get a PC based scope and have a bloody look!!! No guessing. No noise? No problem. BTW, the concept of following is anathema to me. If I could, I'd block millercarbon permanently. Nothing he writes is worth the bits to transmit. |
Had to drop by for a moment just to say.... First some special snowflake gets triggered and of course mini-Mao removes the post. But too late, another one triggered, copied and pasted the whole thing. So its still up there for you all to read the truth about yourselves. Which includes such a lack of self-awareness you leave that post up. Hilarious. If one of you would now be kind enough to copy and paste this one, so its up even after it gets removed (which, Kafkaesque, look it up) that would be ROTFLMFAO hilarious! |
Wow, I guess you could say that my whole life is cluttered (I blame my mother, who always told me, “Save everything. You never know when it will come in handy!” . . . . “Yes, Mother”. It was my father who showed me that saving too much, such that nothing can be located and put back, can be as bad as never saving anything. Fortunately, I am not as bad as Mother was (after she passed and we went through her belongings, we found a utility bill from 1949!), but I am indeed bitten. I even save old buttons, in hopes that one day I will find the missing shirts or compatible ones. I have tried to fight back against my thoughts that, “Just when I throw this away, I will find out what it goes to and will kick myself.” And, every once in a while, I do find out what the thing belonged to and restore it to its rightful location, and for that moment everything feels right with the world. |
bob540 This makes me think of the guy who commented here, after seeing my set-up, that I had too much cluttered together. I took that as meaning the clutter was visually unsettling, but having read Erik’s comment, I’m thinking now that he might have been referring to noise being generated by the proximity of several pieces of electronic equipment (though I guess he might also have been referring to reflections?). >>>>>There is a third and more mysterious reason, gentle readers, why clutter is bad for the sound. I don’t wish to appear messianic or overly mysterious but think of it like Feng Shui. Having an organized and uncluttered space is good for everything, you can also think of it as minimizing entropy. Especially bad for sound - and I’d don’t mean to be ironic here - are CDs, magazines, books, newspapers, LPs, videos, and extra unused electronics and cables you might have lying around. Even musical instruments. How’s that for irony? |
This makes me think of the guy who commented here, after seeing my set-up, that I had too much cluttered together. I took that as meaning the clutter was visually unsettling, but having read Erik’s comment, I’m thinking now that he might have been referring to noise being generated by the proximity of several pieces of electronic equipment (though I guess he might also have been referring to reflections?). I have two Furman’s below on that same table, each plugged into the same wall outlet. One has all 8 outlets (4 are filtered and 4 unfiltered) with all 8 having something plugged into it; the other has 2 devices plugged into its 6 outlets (so far). I hadn’t even thought if this whole arrangement I have might be introducing noise — but I’m not sure what I do about it if it is (that being the only nearby outlet). Interesting topic. |
Yeah, no, it doesn’t work like that. Not even close.Yeah, actually it can work like that. Not long ago I had the exact problem Eric was referencing, with a streaming device's wall-wart smps causing noise that bled into my phono preamp. Some wall warts (the heavy ones) are indeed just a linear PS in a plastic case, others are SMPS and usually the culprit of circuit pollution. |
