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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Non-linear audio systemsPosted by Amir on: 2/13/2023
Rowuk
I have fully read all pages of this topic (mad mad mad electricity) two times and I know good sound does not come from pure sinewave .I should say I am here (like a student) to learn more and I do not like spread my in-complete BS ideas here.
I remember Romy compared an ideal transformerless IGBT AC regenerator (it had better Voltage Sinenave than Pure power) to Pure Power and the Pure Power was better sounding. I trust Romy and his judgment in Audio.I also know CEC TL0 output digital square wave is far from ideal.I am electronics engineer and all we read in university was about linear systems (constant coefficient for all 4 Maxwell equations) but the trust is the Audio systems are not linear systems and also our hearing system is not linear.
if you look at linear models both horns and tubes are not ideal but in real world we hear best sound from properly designed horn/tubes . It means Audio is a Complex Subject and improving sound is not easy task. I remember Romy wrote even Richard (owner of Pure Power) does not know why Pure Power is good. 
listening to ABB 20KVA UPS proved me the Pure Power 3000+ has not enough power and the test result was interesting to me. about importance of low impedance AC Supply I have not enough experience to prove it but with my limited experience every thing that increased the impedance (resistance ohm) then I loosed Bass and attack. both Isolation Transformer and long high impedance AC cable between AC panel and my equipments both degraded the bass and attack.



   
  
 rowuk wrote:


My opinion is that if a device sounds bad on bad electricity days, that device is bad - not the AC supply. The best that we can hope for is to change our listening times where the AC supply is supposedly not as corrupted (also an assumption). 


We need to demand that our amps and preamps as well as sources are properly built for the environments where they are typically used. I find threads like these are totally useless as we have no process for defining better - rather only the typical "high end" BS terminology. Do I care if Amir suffers? No. In my opinion, he needs a better process, not more gear.






  I am not Audio Designer and have little knowledge about proper Power Supply design for DAC/Pre/Power and ...My limited experience tell me "if a PSU is less sensitive to AC quality then the dynamics are more compress".
I think (or it is better to say I guess) in non-linear systems (like Audio systems) we can not solve AC quality problem by designing a filter in PSU and It is better to Generate good AC Power. It means in non-linear Systems every part should be ok and we should not solve the problem of Part A in Part B.

I have asked some audio companies to design a high power AC regenerator but they told me it has costs. the only way is a smart designer start designing a AC regenerator and send his product to trusted expert beta testers like Romy.

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