but of course due to the lower equivalent impedance of the bigger unit....the same kind of effect you get when plug in direct to the wall and your wall gets its power from a 25kva pole transformer just outside your house or in your neigborhood....🙂)
Printer2,
RF IS present on our world's mains supply. So many TV stations, radio stations, cellular phone and repeaters.
Ktuuri,
Your experience is in accord with that of many other audiophiles.
The figures I received from a local dealer who is an expert on mains power treatment are 2 times the power for various sources, including pre-amp and 2.5 times the power for power amp.
RF IS present on our world's mains supply. So many TV stations, radio stations, cellular phone and repeaters.
Ktuuri,
Your experience is in accord with that of many other audiophiles.
The figures I received from a local dealer who is an expert on mains power treatment are 2 times the power for various sources, including pre-amp and 2.5 times the power for power amp.
Yes indeed RF is present. More hash and RF comes to your audio system from home electronics and non-linear loads such as light dimmers and industrial speed drives.
But is it on the DC in your power supplies? If you have a system that is so high end and accurate that you can pick out the effects of RF noise in your sound maybe the equipment really is not that good being susceptible to real world conditions. If you actually do have a problem with a radio station right next door or you are on the same transformer as someone arc welding then I would say go for it. So far you have not said you are having a problem.
Most audio systems, including High End ones, are susceptible to RFI present everywhere on the mains supply.
a so called "high end" high end system that are still susceptible to RFI are poorly designed systems...🙂
why should i, after paying a fortune on a gear still have to do hard work to get that RFI issue in check? something doesn't look right here....🙂
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That's life in the digital age, with noisey switching power suppies everywhere, TVs, Computers, routers, DVD, CD players, cell ph, Microwave, battery chargers(cell,cordless items,toothbrush), Telephone, answer machine, Digital box for TV, and the list goes on. All the people living on the same grid has an affect on the quailty of the AC.
Even if the item is (switching Power suppy) turned off, it doesn't matter, it is still active in standby mode. The only way is to unplug.
Or use filters, isolation transformer, or some type of Power Cond.
One way for an experiment is to unplug everything in your home that has a Switching Power supply (list above) and unplug your Fridge as well.
Then sit back for a listening session. You should notice better clarity and Depending on how bad your AC, maybe a cleaner top end, among other.
If you hear a difference, then you may benifit with addressing some AC issuses.
If you can't hear a difference, it deosn't mean someone else can't,
just consider yourself lucky! 🙂
How about doing something real silly. Like scoping your power supply. I know those with golden ears would poo-poo the idea but most engineering types like reall numbers.
I can imagine if I went up to my old boss and said, 'No I never actually measured the effectiveness of the EMI filter I designed but if you ear real close to it you should be able to here more space.'
Now that is silly now isn't it!
Number + specs don't always tell the tale. Many S/S gear test much better then tube gear. But alot of folks, myself as well, perfer tube gear.
Although I do take specs into account, it always comes down to what I hear.
Instead of trying to belittle someones else's experience, you could have just said " If the Power supply is right, then you don't need it" if that is your experience.
The OP is asking for advise from those with experience with Power Cond., Filters, Islation tranformer.
Have you tried any type of Power Condition? and which type?
If you did and heard no difference, consider yourself lucky.
Power Conditioners and other ways of addressing AC are for those who can hear a difference.
Not everyones experance is the same as yours or mine.
I can only talk about mine. Others may be different.
YMMV
Number + specs don't always tell the tale. Many S/S gear test much better then tube gear. But alot of folks, myself as well, perfer tube gear.
Although I do take specs into account, it always comes down to what I hear.
Instead of trying to belittle someones else's experience, you could have just said " If the Power supply is right, then you don't need it" if that is your experience.
The OP is asking for advise from those with experience with Power Cond., Filters, Islation tranformer.
Have you tried any type of Power Condition? and which type?
If you did and heard no difference, consider yourself lucky.
Power Conditioners and other ways of addressing AC are for those who can hear a difference.
Not everyones experance is the same as yours or mine.
I can only talk about mine. Others may be different.
YMMV
i do not think that this has anything to do with isolation transformers at all.....😉
but a lot to do with beliefs, personal preferences, and the need to feel good....which of course everyone is entitled to.....😀
but a lot to do with beliefs, personal preferences, and the need to feel good....which of course everyone is entitled to.....😀
Tube amps sound different from transistor amps for various reasons. I am building a couple for myself. Maybe we are not measuring the right thing to tell us how they sound.
Sorry if my questions sounded belittling. But for some reason I got the distinct impression that a solution was to be engineered when no one actually stated what the problem was. This stuff is not rocket science you know.
Go back and read me questioning if he really has a problem. The reply I got was
.
Well I did direct the OP in case he really did have a problem with EMI and needed to solve it. The MIL handbooks were of great use when I spent a half year on EMI filtering on a military project. Sadly that was a number of years back and much of what I learned has faded, well at least the math but not the concepts.
But now I am working in an industrial environment and know what can be riding on our power. It is not pretty but unless their is a specific situation with a major problem normal audio equipment can deal with it. You do not have to take my word for it, how would you know if I had a clue of what I was talking about anyway. That is why I suggested taking measurements before running off and spending hard earned money on something you may not need. But that is not what anyone wanted to hear.
I have seen postings and sales pitches on how isolation transformers will change how you hear your music. I am a little skeptical. I hoped that came out in my post. Did a search for a document I vaguely remembered, you might find it of interest.
Power and Grounding for Audio and Video Systems A White Paper for the Real World – International Version
http://www.audiosystemsgroup.com/SurgeXPowerGround.pdf
While it only scratches the surface it does act as a primer on EMI and professional audio-video installations. Page 31 and on does talk about isolation transformers and their function, a noteworthy comment is the following.
So even if you do have a problem and if you do buy the right piece of equipment you can still end up with the same problem. And if you can not measure it before you put your fix in and afterward to see if it has solved the problem how do you know you solved the problem. Most people will just sit in front of their speakers saying `Boy does that sound sweet now`.
I'm well aware of the fact that 3 thins are necessary:
Isolation transformer;
RFI filtering;
Separate, good grounding.
Isolation transformer;
RFI filtering;
Separate, good grounding.
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