16-Aug-2014, 16:04
Krorghar,
Power is drawn by the electronics rather than the wall socket pushing it. Some give the analogy of running water, which is far from the truth.
Voltage is there, in my case 220 VAC (Alternating at 50 cycles per second) but the amount of current drawn, so the power drawn, depends on the "then" requirements of the electronics. (simply Power = Current x Voltage). If the amp needs to deliver sound for a sudden drum kick from nothingness, there will be a very quick request from the wall for increased current to deliver that power. And the wall needs to be ready all the time to provide whatever the requirements are...
Class A solves this problem by taking a steady amount of power from the wall, and turning the unused amount to heat. The louder Class A Amps play, the cooler they are...
For anything other than that, the requirements of power from the wall depends on the music... The ability to adequately deliver the requirement is the "low impedance" of the wall power... (impedance is "resistance" for AC) So the power grid should not "resist" the amps requests...
The noise in the power line comes in various forms, but one of the biggest problems is the presence of higher frequency information (Other than the 50 Hz we need) that does unwanted things to our power supplies. It seems like a very good idea to clean and diminish those by filters (in this case, a low-pass filter which effectively lets the 50 Hz pass, and tries to stop anything bigger)
Most filters, while trying to clean up high frequency noise, increase impedance so it is harder for the electronic component to draw adequate power. The increased impedance is the direct result of the components used by the filters to "resist" higher frequency "noise". So they also resist the instantaneous changes in power requirements which look like noise...
This in turn kills the dynamics (mostly macro, but sometimes microdynamics). This is mostly ok for Class A equipment, where their power draw is almost always the same, however for anything other than that, and in my experience Devialet in particular, which requires varying levels of power depending on the musical passages, it takes all the fun away...
This is a rouge generalization as some filters act worse than others, but I have yet found one that I could live long term. Initially most sound good, but then you get bored of your music too easily...
Best if you try to audition some for your home, and watch out any dynamics loss together with the positives of filters...
So far the only in-line so called filtering device I am happy to put between my Devialets and the wall is a very large Isolation Transformer...
Cheers...
Kunter
Power is drawn by the electronics rather than the wall socket pushing it. Some give the analogy of running water, which is far from the truth.
Voltage is there, in my case 220 VAC (Alternating at 50 cycles per second) but the amount of current drawn, so the power drawn, depends on the "then" requirements of the electronics. (simply Power = Current x Voltage). If the amp needs to deliver sound for a sudden drum kick from nothingness, there will be a very quick request from the wall for increased current to deliver that power. And the wall needs to be ready all the time to provide whatever the requirements are...
Class A solves this problem by taking a steady amount of power from the wall, and turning the unused amount to heat. The louder Class A Amps play, the cooler they are...
For anything other than that, the requirements of power from the wall depends on the music... The ability to adequately deliver the requirement is the "low impedance" of the wall power... (impedance is "resistance" for AC) So the power grid should not "resist" the amps requests...
The noise in the power line comes in various forms, but one of the biggest problems is the presence of higher frequency information (Other than the 50 Hz we need) that does unwanted things to our power supplies. It seems like a very good idea to clean and diminish those by filters (in this case, a low-pass filter which effectively lets the 50 Hz pass, and tries to stop anything bigger)
Most filters, while trying to clean up high frequency noise, increase impedance so it is harder for the electronic component to draw adequate power. The increased impedance is the direct result of the components used by the filters to "resist" higher frequency "noise". So they also resist the instantaneous changes in power requirements which look like noise...
This in turn kills the dynamics (mostly macro, but sometimes microdynamics). This is mostly ok for Class A equipment, where their power draw is almost always the same, however for anything other than that, and in my experience Devialet in particular, which requires varying levels of power depending on the musical passages, it takes all the fun away...
This is a rouge generalization as some filters act worse than others, but I have yet found one that I could live long term. Initially most sound good, but then you get bored of your music too easily...
Best if you try to audition some for your home, and watch out any dynamics loss together with the positives of filters...
So far the only in-line so called filtering device I am happy to put between my Devialets and the wall is a very large Isolation Transformer...
Cheers...
Kunter
Kii Three, dCS Network Bridge, Roon Nucleus, Kuzma (Stabi S, 4Point), Soundsmith StrainGauge, Stromtank, Echole Cables
Istanbul, Turkey
Istanbul, Turkey
