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The Audio Science Review Forum |
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Ash
Senior Member Joined: 18 Mar 2013 Location: Dorset Status: Offline Points: 4334 |
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Thanks very much Jon.
So Graham, if the ferrite position is essentially the end of one circuit and the beginning of another, would it not be wiser to place the next ferrite at the same distance again, to attenuate the fundamental frequency rather than its second harmonic?? The amplitude of the fundamental is also higher than that of subsequent harmonics so more to attenuate? With all the expense of setting up speakers for optimum performance and reference sound, perhaps £3.5k MySphere is a more sensible choice? An expensive investment but backed up with plenty of R+D and extensive sound measurement techniques.
Edited by Ash - 14 Jul 2020 at 7:27pm |
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We do not see things as they are. We see things as we are.
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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@ Jon: I wouldn't even try to measure frequency vs amplitude, because the cable reflections will swamp any theoretical attenuation. It is theory after all.
@ Ash: Where a second ferrite is used, the first ferrite is for the upper frequency. The origin for the lower frequency is still at the cable start. The 2nd harmonic will peak in the middle of the filter frequency's first quadrant, and so, theoretically also be attenuated to a lesser degree. Hint: wavelength is in inverse proportion to frequency. Higher frequency - shorter wavelength. For the USB, I decided not to try 100MHz due to the possibility of "rounding-off" the properties of (what should be) the squarewaves. The FFT of a squarewave being the fundamental and all its whole number odd harmonics. But all this is theory anyway, although I would like to be able to measure it one day. Edited by Graham Slee - 14 Jul 2020 at 10:59pm |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Ash
Senior Member Joined: 18 Mar 2013 Location: Dorset Status: Offline Points: 4334 |
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Yeah, otherwise with digital, you may find yourself attenuating the signal rather than the interference.
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We do not see things as they are. We see things as we are.
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capetownwatches
Regular Joined: 08 May 2019 Location: Cape Town, RSA Status: Offline Points: 61 |
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This thread certainly has veered off course somewhat...did we not begin by discussing Audio Science Review..?
That said, interesting stuff although much of it goes over my head...
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Solo UL=Kingrex HQ1=NFB11.32=LD Mkll=SRM353X=DAC1 USB=RL Concero
LCD2F=HD6XX=SR-L500=DT990 600Ω=TH-X00=K612Pro=K240S=Y50 KRK Rokit 6=Mogami/Sommer->Neutrik/Amphenol |
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BackinBlack
Senior Member Joined: 05 Feb 2012 Location: Hinton, N'hants Status: Offline Points: 2020 |
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Like the science and logic goes over the heads of those at Audio Science Review.
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Just listen, if it sounds good to you, enjoy it.
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Guests
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Has anyone here spotted this?
S. |
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CageyH
Senior Member Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1678 |
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No.
Not a forum I look at often, as they are purely measurement based. In their reviews, they never listen to it. With my HiFi, I do the opposite.
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Kevin
European loan coordinator, based near Toulouse, France. |
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