Sorry for that, but my english not so good.I have Ac quality problems, my system sound amazing just some times, jan 1 was the best, but around 1 am always ok, or good.Do you knw this problems??im not beginner, im real highender, but my budget are limited.
i know my gear are cheap, but i have 20 years experience .im using sotm sps500 with 4xlt3045 regulators .2 step down right now. my streamer are just square wave ocxo rpi 4 special streamer, nothing fancy , but this is my budget.
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i have dual mono full regenerative preamp with separated volume control circuit,but the dirty Ac quality affected my dual mono power amp stages without any pre stages.
i have dedicated power lines for audio, and digital. but the magic sound started at night,but i should sleep this time.high power choke not solve this problems, isolatin transformers can solve like 10 procent.
only one important things i can not solved, the power amp Ac quality!!!another problems just so easy to solve!!!im not Harry Potter, so thats my problem.
Sounds like a PSA power generator would help you.
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use passive choke, not for power amps!!but Thank you!!big isolaton transformers makes better job , but only 20 procent
passive choke ok, if your power are not so good, if the power quality getting better, the passive choke degrade the sound little bit.
sometimes i have good ac, so almost all songs are good, for exapmple phil collins getting so so good!!!and james taylor!!!
Welcome to the forum.
Its a fairly common occurrence for Hi-Fi systems to sound better once inside and outside ambient noise is lower in the evenings and wee hours of the morning; and when other electrical devices and lights have been turned off on the electrical system they share with a Hi-Fi system.
You might be experiencing this phenomenon.
Regards.
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As there is less activity on the power distribution system lat at night, power quality tends to be better. Thus your system tends to sound better at night. Less noise and distortion riding on the AC input. A dedicated power feed from your distribution panel to the outlets that serve your equipment is a good start. Form there I suggest the following solution:
Welcome to the forum pages balasi. 
As others have already mentioned, the quality of sound you get out of your system, particularly if it’s a highly resolving one, will vary according to the ‘quality’ of power you’re getting from the wall (your public utility company). The most significant affect is due to power delivery which can be impaired by the level of demand from other appliances in your house, from your neighbours and local community. Essentially it’s the shape of the AC wave going into your gear, at least according to the experts.
So-called ‘power regeneration’ is one solution to this and PS Audio has a product called the PowerPlant which is a power regenerator. I have 3 of the older PowerPlant model P10, one each for my mono block power amps and the third for the rest of my gear. Upon hearing the difference a PowerPlant makes for the first time, I was astonished! Great value IMHO.
If you’re interested in the PowerPlant’s evolution, Paul McGowan, PS Audio’s CEO, has written a series of articles reflecting on the 50 year history of PS Audio. The latest installment is in this month’s ‘Copper’ magazine at the following URL.
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I will chime in here as well. As most have said, a regenerator is a fantastic solution.
I integrated the older P600 (found used for $400) into my system, eliminating these issues.
Also, there is a much quieter background, slightly better dynamics, and micro-detail presentation (Subjective, of course). I hope that helps.
I also know two of my close friends who have gone to the more current models and had great results.
Good luck and happy listening.
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I hope that helps.
I live in the UK and use a P10 for most of my system (I also have a stellar P3). On the P10 I see incoming distortion of 3.1% or 3.2% regardless of the day. However, I’m convinced that the system sounds worse at weekends than during the week (even though the P10 shows no difference). The UK distributor isn’t far from me in an industrial unit. He’s lucky and only sees 1.4% incoming distortion.