SD is attractive as a source since it can be accessed by a very low power (tens of milliwatts) CPU, far less radiated and conducted noise than an Intel CPU as found in laptops/desktops (tens of watts). An SD player with I2S output can run from a small battery for several hours.
Not anymore with Lithium batteries, have a mate with still a portable Ifi product from many years.
Yeah that's a great advantage..
I did have some thoughts about powering a DAC from some battery, rather than USB,
and now we recall there is a product that is already built like that.. (tho, again, without an easily replaceable battery)
I see.
Thank you both..
This is what I call a nice battery:
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This solid electrolyt lead battery, not so good for sound, outputt impedance is too high and too much far from the active parts !
As we are on the blind with sound when it comes to buy off shelves, my purpose was more to list items what we believe here to be an advantage for the sound. Certainly naive and sort of trade off but glue to your targets.
Lithium cells based are much better for the sound than the one you linked. If you have 15/20 hours of music wit the little toys I linked above it is enough and if directly linked via its non wireless input I surmise it can also power such devices in the same way one you linked (SML, etc)
As we are on the blind with sound when it comes to buy off shelves, my purpose was more to list items what we believe here to be an advantage for the sound. Certainly naive and sort of trade off but glue to your targets.
Lithium cells based are much better for the sound than the one you linked. If you have 15/20 hours of music wit the little toys I linked above it is enough and if directly linked via its non wireless input I surmise it can also power such devices in the same way one you linked (SML, etc)
Wow, who would believe the internal material of the power source affects the sound..
Good to know.
Good to know.
delta sigma is affected significantly 😀 a good multibit is affected less ... delta sigma dacs are very sensitive to the jitter, multibit dacs are less sensitive ... that is why an amateur can make a good sounding multibit even from cheaper components in more simple design and still sounds good ...
both designs are sensitive to the PCB routing
both designs are sensitive to the PCB routing
BTW miro1360,
do you know how UTsource get their AD1862 chips?
How come they get it in a fair price, and not 70$ as others mentioned?
do you know how UTsource get their AD1862 chips?
How come they get it in a fair price, and not 70$ as others mentioned?
I think they sell out the old store (obsolete parts). A few years ago this DAC cost about 6USD. I can see now how the price goes up for some worthy chips. Like the TDA1541A S1 cost above 150USD today. It was not the case few years ago, one bought this dac for about 40. I watched this price but nobody gave it cheaper, so I didn't buy it (S1 version). I don't buy it at all today 😀 These DACs turned into gold in electronics 😀
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Terrific.
But according to what some people wrote here,
they like the AD1862 even more than the TDA1541A..
But according to what some people wrote here,
they like the AD1862 even more than the TDA1541A..
The essence was what happens when a good DAC chip starts to be completely out of stock, any of old good chips or transistors 😀
BTW,
I found 3 DAC products by the company xDuoo, which are based on the WM8740..
All 3 of them are WM8740, and not WM8741 or WM8742.
If one of them was WM8741 or WM8742, I would give it a try..
But you guys mentioned the WM8740 is less good than the WM8741/2..
As you wrote:
Also, since you wrote
or skip it altogether.. (since I bought 4x AD1682 chips)
I found 3 DAC products by the company xDuoo, which are based on the WM8740..
All 3 of them are WM8740, and not WM8741 or WM8742.
If one of them was WM8741 or WM8742, I would give it a try..
But you guys mentioned the WM8740 is less good than the WM8741/2..
As you wrote:
Also, since you wrote
it makes me wonder should I really give the WM8741/2 a try,
or skip it altogether.. (since I bought 4x AD1682 chips)
The conversion to a higher energy level inexorably occures at the expense of accuracy and degraded signal properties. If that is a decisive factor for the overall quality as it seems to be, the technical development has been heading sturdily in the wrong direction.
I hope you bought AD1862 😀 ... it is up to you. I don't know xDuoo. It can be a DAC with additional stages. These stages will affect the sound, such as coloring, distortion. Such a comparison won't bring you anything.
Anyway, AD1862 in its basic design is significantly better as WM874x in any modification.
Oops,
yes that's what I meant 🙂
Interesting point you raise.
It reminds me something they wrote in the product page for that DAC:
Have you ever encountered the acronym OCL?
Or it's their own invention? 🙂
Does it change your opinion regarding whether it's worth getting it now?
This is great to hear.
I saw the PCB you created, populated with components, and it looks not too crowded (which is great)..
Compare that to the picture of the SMSL M3's PCB, which looks like it has 4 times more components..
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It is a design with no output capacitor (no coupling capacitor), it is not meaning as invention, just some of the engineers figured out the coupling capacitor sucks 😀
All my DACs are tested and used only as "OCL" and it won't be different 😀
When I said "invention", I was not refering to the idea of not using capacitors,
but to the "OCL" acronym..
(it doesn't look like an industry known acronym.. so I thought they created it)
Regarding this,
is this idea of giving up the output capacitors possible due to the use of Dual Rail power (+V, 0, -V), instead of Single Rail (+V, 0)?
(like in amplifiers)
but to the "OCL" acronym..
(it doesn't look like an industry known acronym.. so I thought they created it)
Regarding this,
is this idea of giving up the output capacitors possible due to the use of Dual Rail power (+V, 0, -V), instead of Single Rail (+V, 0)?
(like in amplifiers)
Yes they used coupling capacitors due to single rail power supply. With a DC/DC can be dual power supply created (many types). Some modern DACs or headphone amplifiers have this in the chip integrated (mostly as the voltage pump only for negative rail). Somewhere in my posts I posted my schematic, how to create the virtual ground, which is also one of techniques how to avoid the coupling cap.
I see.
So the Dual Rail trick helps also with DACs, not just with Amplifiers..
Nice to know.
BTW,
you say there are other kinds,
do you maybe know where it's possible to read more about the types that exist?
So the Dual Rail trick helps also with DACs, not just with Amplifiers..
Nice to know.
BTW,
I thought the only kind of dual rail is +V,0,-V,
you say there are other kinds,
do you maybe know where it's possible to read more about the types that exist?
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