One and a half Posted July 16, 2017 Share Posted July 16, 2017 30 minutes ago, Ralf11 said: How noisy is your power line? Totally depends on the devices connected to the power line. An incandescent lamp = 0.0000uV SMPS = mV of frequency to several MHz Your choice! AS Profile Equipment List Say NO to MQA Link to comment
One and a half Posted July 16, 2017 Share Posted July 16, 2017 Quite right @fas42. If there is a problem, then use an engineered solution to overcome. The choice of a 'power conditioner' does not fully relate to how that device will work in an audio system. For one, the impedance drops like a stone, and the caps in power conditioners can create resonances that cause more problems. Caps are unforgiving as to filter harmonics unless they are tuned with the correct inductors, at worst they keep harmonics locked in the system. AS Profile Equipment List Say NO to MQA Link to comment
One and a half Posted July 16, 2017 Share Posted July 16, 2017 12 minutes ago, Ralf11 said: Hiss? or Hum? Neither the power line is responsible for only connections that trap the unwary, or lousy amplifier design. AS Profile Equipment List Say NO to MQA Link to comment
One and a half Posted July 16, 2017 Share Posted July 16, 2017 3 minutes ago, Ralf11 said: So, when you remove the noise coming in via the mains power feed, it sounds as if a veil over the music has been lifted? You are a poor poster, not quoting any text to derive an answer, leaving responses open ended and guessing. Use the Quote button. kilroy 1 AS Profile Equipment List Say NO to MQA Link to comment
One and a half Posted July 24, 2017 Share Posted July 24, 2017 2 hours ago, audiventory said: To estimation of impact power conditioner, us need to learn primary goal - analog output of DAC: what power conditioner change there? A single point power supply will give all the audio devices the same reference. This means reducing the risk of unequipotential grounds that causes further SCIN in the signal leads. Further the conditioner, and can be anything that provides a single source, still means leakage currents can travel to and fro via AC power. To stop these, for USB anyway is to use isolation in the signal path, or super shielding, xlr cabling, and bonding cables. By no means is there a method to isolate Dacs from AC power without severely creating a high impedance where we want everything common to the one source. AS Profile Equipment List Say NO to MQA Link to comment
One and a half Posted July 25, 2017 Share Posted July 25, 2017 14 hours ago, Speedskater said: This is what Ralph Morrison and Bill Whitlock have been writing for decades. But it's Common Impedance Coupling noise not SCIN that's the problem here. Thanks Speedskater for the clarification. AS Profile Equipment List Say NO to MQA Link to comment
One and a half Posted July 25, 2017 Share Posted July 25, 2017 7 hours ago, gmgraves said: That depends on where you are, I guess. My friend Sergio lives in Rome. He says that his mains is very noisy and he uses a mains filter. Another audiophile friend, Geoff, lives in Silicon Valley these days , but he used to live in London, He said that his mains was very dirty (and I've seen letters to the editor in several British Hi-Fi rags ask what they could do about the dirty mains supply. Also, keep in mind that while British receptacles are very robust and three pronged, most of mainland Europe uses a rather flimsy, two round-pronged receptacle without a ground connection. The schuko plug has an earth connection built in for many, many years now. It is also not flimsy unless your hands are like hammers? AS Profile Equipment List Say NO to MQA Link to comment
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