Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)

[EJ3]

Douk A5 ships with 48V/5A MXD-1201500 GaN. IMHO, these extremely thin, unshielded C8 stock power cords RUIN the sound and need to be changed ASAP!

View attachment 451007

I'm curious: What's in your home that puts out enough RF that makes this a problem?
If there is a signal in your home doing that, you should think about eliminating that.
As that may be a long term health issue (think possible cancers, etc).
Or shield it.
Or perhaps if you are living under a major power transmission line, move?

 

[Speedskater]

Well Wall Worts in general are a known source of RF interference.
But well designed audio components shouldn't be too susceptible.

 

[EJ3]

Well Wall Worts in general are a known source of RF interference.
But well designed audio components shouldn't be too susceptible.

The receptacles can be wire in such a manner (yes, there is a way that is national electrical code legal [unless they have changed the code recently]) that a 2 prong can be grounded, also.
But, what you point out is one reason that I am not fond of gear that uses wall warts as a power supply.
My wireless headphones is one of the few things that I have that do use a wall wart (Sennheiser RS 220 Digital Wireless [Uncompressed] {not Bluetooth but operates at 2400-2483.5 MHz}). And that is pluged into a UPS in another room.

 

[GabrielPhoto]

You should be happy instead of complaining.
You wanted to order a cheap, no-name power supply, but without a manufacturer's mark on the power supply, all the markings and certificates are just garbage. You could get lucky, or you could get the absolute worst junk.

But you received a power supply from a reputable Chinese manufacturer that not only builds good products, but also has them tested and certified by Intertek, a recognized British company operating worldwide, including a comprehensive safety test.

You should return it.

Did you forget your pills this morning or just feeling like a geeky keyboard warrior?
Just trying to understand why the childish, arrogant and rude reply. I sure hope your other 3367 posts are worth something...

A simple, "that is actually a better brand than the one on the photo" (taken from THIS very thread) should have sufficed and not make you look like a D..... (welcome to my ignored list as well).

 

[GabrielPhoto]

Both 48V 5A DC. Certainly different stickers.
I would assume there are literally hundreds of manufacturers and chances to be served from a different batch are high. Or are there other parameters wrong as the 2nd picture is hard to read.

Thanks!

 

[Roland68]

Did you forget your pills this morning or just feeling like a geeky keyboard warrior?
Just trying to understand why the childish, arrogant and rude reply. I sure hope your other 3367 posts are worth something...

A simple, "that is actually a better brand than the one on the photo" (taken from THIS very thread) should have sufficed and not make you look like a D..... (welcome to my ignored list as well).

Maybe it's just annoying users who complain without first looking, informing themselves, or even asking questions.
I've given you an answer with all the important information for you, both regarding the manufacturer and the certifying company, admittedly somewhat sarcastically, for the reason stated above.
Unlike you, I have neither attacked, insulted, nor personally offended you, and I won't stoop to that.
Everyone can now think for themselves about this.

 

[Punchy_Power_Cat]

even 48v vs 48v where I expected little difference, the GaN was clearly more detailed with hints of better separation and soundstage as well.

the output stage of the amp is not being directly powered by components within the PSU for there are a couple of dozen other components, capacitors, transformers and so on in between. If there is a sonic improvement to be heard then it is because of different EMI signature. A badly designed amp will pick this EMI from the PSU up and introduce it into the audio as noise. A good designed amp does not give a f*.

 

[GabrielPhoto]

Has anyone seeing this one?
View attachment 459284

I ordered it from Amazon as the picture was showing one from the first post on this thread (below)

OK quick update.
I do NOT recommend this power supply.
With an aiyima a07 max i was testing 4 new shakers (shed audio sa2) and while testing and pushing lower frequencies demoing Monster Hunter the amp kept going into protection....
I thought it was just too much for the amp but I decided to test my fosi 48v 10a and 5a and both are able to play the same scene perfectly fine over and over
Switching back to this one, we go into protection again.

 

[Jamproject]

Hello,

For the amplification of a 3-way dsp filtered speaker, I will probably use 3x Fosi audio V3.
I would like to buy them without power unit and built just one for the 3.
I aim for around 36V supply so around 6x120W Max.
Can't decide between 3 Mean Well supplies with 200W or 350W or just one big supply like Mean Well LRS600.
Any opinions?

Thanks

 

[Sokel]

Hello,

For the amplification of a 3-way dsp filtered speaker, I will probably use 3x Fosi audio V3.
I would like to buy them without power unit and built just one for the 3.
I aim for around 36V supply so around 6x120W Max.
Can't decide between 3 Mean Well supplies with 200W or 350W or just one big supply like Mean Well LRS600.
Any opinions?

Thanks

You may want to check about the master-slave configuration of 3 stacked units before powering them by the same PSU.

 

[Roland68]

You may want to check about the master-slave configuration of 3 stacked units before powering them by the same PSU.

I would use power supplies with different power levels for each frequency range.
For example, 300 watts for the bass, 60-120 watts for the midrange, and 20-50 watts for the treble.

 

[Jamproject]

I would use power supplies with different power levels for each frequency range.
For example, 300 watts for the bass, 60-120 watts for the midrange, and 20-50 watts for the treble.

Is it because of the spectral power density ?
Lets say LRS350-36 @40V for bass, LRS200-36 @36V for medium and LRS150-36@32V for treble. Do you think it is reasonable?
Is LRS serie OK for the application or another MeanWell serie or brand would be better?

 

[Roland68]

Is it because of the spectral power density ?
Lets say LRS350-36 @40V for bass, LRS200-36 @36V for medium and LRS150-36@32V for treble. Do you think it is reasonable?
Is LRS serie OK for the application or another MeanWell serie or brand would be better?

Absolutely not sensible.
My specifications were already exaggerated; that's far too much for the mids and highs, and also not sensible.
LRS is fine; I'd go for the HRP or N3 for the bass range.
LRS 350/75 or 100/50 or 35 should be more than sufficient, and the power supplies for the mids and highs should barely be loaded by 20%, if at all. The LRS N2 is also available now.
HRP 75 and 100 for the highs and mids; anything else would be too much. For bass, HRP 300 or N3

 

[Mr_RGB]

This graph from the TPA3255 specs may help estimating power versus voltage needs.

 

[tcg]

I have both Fosi 48V 5A models from Fosi Audio. Each one is connected to one of my two Fosi ZD3 amplifiers. I think the volume of the GaN version is lower. I'm waiting for some quick-connect banana plugs to do tests with a decibel meter on the same speaker to be sure.

 

[EJ3]

Well Wall Worts in general are a known source of RF interference.
But well designed audio components shouldn't be too susceptible.

But, in the long term: people are likely suseptable, I believe.
Since 2007 I have had a number of explainable & unexplainable cancers (they are an on going thing).
I have a family history of only one type: a skin cance: Basil cell carcinoma (which is the only one that I have a family history of in the last 4 generations).
But I have several others that there is no family history of.
But jobs involving being near high power transmitters (radio stations & shipboard) MAY have caused the others.
I would find the issue & if it could not be rectified, I would move.

 

[Roland68]

But, in the long term: people are likely suseptable, I believe.
Since 2007 I have had a number of explainable & unexplainable cancers (they are an on going thing).
I have a family history of only one type: a skin cance: Basil cell carcinoma (which is the only one that I have a family history of in the last 4 generations).
But I have several others that there is no family history of.
But jobs involving being near high power transmitters (radio stations & shipboard) MAY have caused the others.
I would find the issue & if it could not be rectified, I would move.

When it comes to cancer, humans aren't particularly susceptible to electrical or magnetic fields.

But cables are always involved, and what is the main component of common cables? PVC.
Google PVC and toxicity; it's one of the worst materials on earth, producing pollutants during production, use, and disposal.
The pollutants have been released for decades, and the material can be found in kitchens, children's rooms, cooking utensils, cars, appliances, etc.
Why? Because it's particularly cheap. Better alternatives have long been available, such as TPE and TPU.
And it's precisely these types of toxins that make people very susceptible, especially to cancer.

 

[Speedskater]

But jobs involving being near high power transmitters (radio stations & shipboard) MAY have caused the others.

Doubtful, very doubtful!

 

[EJ3]

Doubtful, very doubtful!

Well, I have had many cancers since 2007 and will again have 1 cancer surgery a week for the next two weeks.
I cannot pin-point anything in my life (no family history and no working with known to be cancer inducing products) but I did, for 30 years, work around things that emited large amounts of RF. And since the cancers are all over the place, not one certain organ or area of the body (even though there isn't much EMPIRICAL or scientific evidence, it is the only thing that I can point to.
And since there was a rash of Police Officers that where laying their hand held RADAR speed tracking units (with them being left on) in their laps when waiting on cars to come that a much higher amount than the averages got testicular cancer. Which stopped being an isse after Police where trained not to do that.
Another rash of Police officers that were doing similar (leaving them on) with the installed in vehicle RADAR speed tracking units. They had a high rate of right side of the brain cancer (just where the RADAR beam would go through that part of their body when it was on). And after the Police where trained not to do this, the brain cancers quit happening.
There is a lot more, if you bother to look into it.
To me, that is enough EMPIRICAL knowledge to indicate being cautious about high amounts of RF.
And, since I have no other mitigating factors in my family or work history of reasons to have multiple types of cancers in vastly different parts of my body, I can point to the fact that my whole body has had long term exposure to high amounts of RF.
And feel that I have good reason to believe that is the probable cause of the cancers.
Of course, your beliefs (and your knowledge) are likely different than mine.
But I'm pretty sure that you cannot prove that this cannot happen.
And, if you can,
I would be interested in seeing that, as I am trying to dicern why this has happened to me, as that would allow me to dismiss one more possible cause.

 

[pablolie]

Well, I have had many cancers since 2007 and will again have 1 cancer surgery a week for the next two weeks.
I cannot pin-point anything in my life (no family history and no working with known to be cancer inducing products) but I did, for 30 years, work around things that emited large amounts of RF. And since the cancers are all over the place, not one certain organ or area of the body (even though there isn't much EMPIRICAL or scientific evidence, it is the only thing that I can point to.
And since there was a rash of Police Officers that where laying their hand held RADAR speed tracking units (with them being left on) in their laps when waiting on cars to come that a much higher amount than the averages got testicular cancer. Which stopped being an isse after Police where trained not to do that.
Another rash of Police officers that were doing similar (leaving them on) with the installed in vehicle RADAR speed tracking units. They had a high rate of right side of the brain cancer (just where the RADAR beam would go through that part of their body when it was on). And after the Police where trained not to do this, the brain cancers quit happening.
There is a lot more, if you bother to look into it.
To me, that is enough EMPIRICAL knowledge to indicate being cautious about high amounts of RF.
And, since I have no other mitigating factors in my family or work history of reasons to have multiple types of cancers in vastly different parts of my body, I can point to the fact that my whole body has had long term exposure to high amounts of RF.
And feel that I have good reason to believe that is the probable cause of the cancers.
Of course, your beliefs (and your knowledge) are likely different than mine.
But I'm pretty sure that you cannot prove that this cannot happen.
And, if you can,
I would be interested in seeing that, as I am trying to dicern why this has happened to me, as that would allow me to dismiss one more possible cause.

EJ3 - here's sending you healing energy. I had my brush with it 9 years ago. Caught it early, did cryotherapy... nothing since, and yet nothing is permanent in life. My fam has a terrible history in that respect though...