FrivolsListener
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- Joined
- Feb 14, 2018
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Considering the amount of equipment Amir has measured that do not show any issues I think it would be unlikely that low mains voltage is the issue. Also you would really need to measure the output of the regulator to ascertain at what point it drops out.
A design should really have plenty of latitude for supply variation. Yes that may increase dissapation and heat in a linear regulator but it's all really very, very basic part of psu design. So if it is the case, then it's just another example of Schitt design
I have a different opinion, of course. Mostly what I read from multiple sources is that only Amir spazzes out about the readings. I certainly didn't get the hum in my phones I use with the Magni 3 that Amir described. And I went listening for noise from the thing. I used phones from 64 to 300 ohm impedance. It's not exhaustive, but it is a data point.
Atomicbob doesn't spaz out over his readings. Like Jason's second plot above, he has a similar noise curve, but 30 dB lower than Amir's.
Should equipment handle a wide range of voltages? Maybe. That's why I said above 120 v +/- 10%. 100 vac is outside of that, yet anything with a switching power supply would handle it. I personally prefer linear power supplies in the audio chain as much as possible.
And this is not some excuse for me to beat on Amir. As I stated above, I bought a Topping D-30 specifically based on his recommendation because I wanted to see if I could hear what he measures.