Subject line pretty much is the question - trying to use the Topping D50 Linear supply's 15 VDC output for my K11 R2R DAC's 12 VDC power input port
(using the 5V output for a Wiim Pro Plus)...
Hoping I can make an inline plug for the cable to go from P50 "Output 2 DC15V/1A" port to (I assume) an in-line resistor to drop the voltage to 12 VDC - to then plug into the 12 VDC port on the K11 R2R - is this feasible - or am I not thinking correctly about this?
https://apos.audio/products/topping...ZH3ZhZtaHntakMnMBiACMhAHnI1LUVRJBYvJxK9CNMWsj
(using the 5V output for a Wiim Pro Plus)...
Hoping I can make an inline plug for the cable to go from P50 "Output 2 DC15V/1A" port to (I assume) an in-line resistor to drop the voltage to 12 VDC - to then plug into the 12 VDC port on the K11 R2R - is this feasible - or am I not thinking correctly about this?
https://apos.audio/products/topping...ZH3ZhZtaHntakMnMBiACMhAHnI1LUVRJBYvJxK9CNMWsj
You could build a LDO regulator in-line
https://www.analog.com/media/en/technical-documentation/data-sheets/lt3041.pdf
but realistically I think you would be better off just using a 12V supply. There are a b-zillion such supplies available cheap. The issue is how noisy are they. But at ~$10 each, you can afford to try a few.
https://www.analog.com/media/en/technical-documentation/data-sheets/lt3041.pdf
but realistically I think you would be better off just using a 12V supply. There are a b-zillion such supplies available cheap. The issue is how noisy are they. But at ~$10 each, you can afford to try a few.
It would be easier to filter a noisy 12V supply than drop the 15V to 12V.
Why is that? It's easy to use those 15V as preregulated supply for a 12V regulator. Not sure why go trough such a bother in the first place reusing a supply, but it can be done easy and proper.
Thanks guys, thought I'd had it wrong about adding a resistor in line to get to 12V....
Was originally just gonna use the 2 x 5V outputs for the Wiim ProPlus and a Topping D50III DAC, but went with the Fiio R2R instead,
I'll prob just get an iFi 12V Power X supply for the R2R DAC - rather than use the stock 12V supply that came with the K11 R2R
Was originally just gonna use the 2 x 5V outputs for the Wiim ProPlus and a Topping D50III DAC, but went with the Fiio R2R instead,
I'll prob just get an iFi 12V Power X supply for the R2R DAC - rather than use the stock 12V supply that came with the K11 R2R
Resistor and cap to each relay, the cap charges to 15V and it closes the relay and the cap then discharges to a HOLD IN voltage.
Make sure the iFi supply connector is compatible in current, diameter, and polarity.
I have the Fiio K11 R2R , what is wrong with the supply that came with it ?
Fiio says it has a lot of regulators in the K11, so the 12 V supply will be filtered more than enough.
I don't hear any noise produced by the K11 and I use the balanced HP out.
Fiio says it has a lot of regulators in the K11, so the 12 V supply will be filtered more than enough.
I don't hear any noise produced by the K11 and I use the balanced HP out.
I have a Fiio K11 R2R Dac. I have replaced the stock 12v supply with a self built Super-regulator based LPSU and the Stock supply is not going back onto it. Improvement is obvious to all of my family. It's not the first time I have seen this benefit on a DAC DC supply, even one with multiple internal regulators. If it helps, mine draws no more than 300mA, so you could use and benefit from a small inline LT3045 regulator as long as it could dissipate at least 3v x 0.3 A, i.e. circa 1 watt. One of those small LDOVR regulators in a matchbox sized aluminium diecast case using the case as the heatsink would do the job very well. Even a TO220 cased 7812 regulator and a couple of capacitors in the same small case would do the job well enough. This is DIY Audio after all....
Off topic but I do find it rather interesting that they sell you a device with a significantly noisy supply and get you to pay for all the additional regulators that are required to remove the noise it generates, all in the name of compactness on a device that you buy to listen with, not look at. Even these same manufacturers are now selling linear PSU's to replace and improve the SMPS supplies that the likes of Audio Science Review say don't make any measurable difference. The industry can't measure the performance improvement a good PSU can bring so there is confusion.
John
Off topic but I do find it rather interesting that they sell you a device with a significantly noisy supply and get you to pay for all the additional regulators that are required to remove the noise it generates, all in the name of compactness on a device that you buy to listen with, not look at. Even these same manufacturers are now selling linear PSU's to replace and improve the SMPS supplies that the likes of Audio Science Review say don't make any measurable difference. The industry can't measure the performance improvement a good PSU can bring so there is confusion.
John
Confusion is the permanent state of affairs in this hobby. Everyone is looking for validation for the purchase made.
Cost cutting on PSU is as old as the hifi industry. No surprise there since it's a bottom feeder territory.
Cost cutting on PSU is as old as the hifi industry. No surprise there since it's a bottom feeder territory.
Improvement is obvious to all of my family.
How did it improve ?
So if I connect the Fiio to a car battery , I should hear a difference ?
"How did it improve ?
So if I connect the Fiio to a car battery , I should hear a difference ?"
It depends on the mood of your spouse (family). If she is happy you will hear a profound positive difference . If not , even the brightest minds of DIY community won't be able to help 🙂
PS -Battery alone may not be the cleanest , noise free solution
So if I connect the Fiio to a car battery , I should hear a difference ?"
It depends on the mood of your spouse (family). If she is happy you will hear a profound positive difference . If not , even the brightest minds of DIY community won't be able to help 🙂
PS -Battery alone may not be the cleanest , noise free solution
^ With all the switching power supplies today , I have no transformers to make a regular supply with Elvee's denoiser.
You can wire 5x power diodes in series with the 15 volt wire. This gives far better regulation than using resistors 🙂
To add to the topic. Being "Johnny come late" bottom feeder I waited10 years to buy Auralic Aries Mini for the street price of $25. Being forced to buy an Apple ($$$) product to serve as a remote and source of operating system was an outrage requiring two additional years to overcome . Finally last week I broke down and bough Ipad for $50. Not going to say that the pain dissipated 100% but I'm OK and the shebang works. Now the Mini costed $399 with Pos wallwart PSU. All that complicated tech and years of R&D for only $399.
For the discerning connoisseur however the company graciously offered 100 years old tech PSU for mere $299 . Looks like good old PSU does not scale down easily . In my opinion (no spouse) the MIni simply needs the PSU to cross the muzak territory threshold. This is just an assumption because I don't have the PSU yet but if the PSU won't help I will wait a few years and find DSD dac on the curb which will be up to the task
For the discerning connoisseur however the company graciously offered 100 years old tech PSU for mere $299 . Looks like good old PSU does not scale down easily . In my opinion (no spouse) the MIni simply needs the PSU to cross the muzak territory threshold. This is just an assumption because I don't have the PSU yet but if the PSU won't help I will wait a few years and find DSD dac on the curb which will be up to the task
Of the SMSL/Topping linear power supplies the P50 is a pretty good one. Changing its output voltage can be done but you will have 3V times the current extra to dissipate.
I would not do so (changed quite a few other types) but when you know the current to the load and when it is low it can be done. NOT with a dropping resistor but by changing a resistor of the internal LDO.
Then you will have a P50 with 12V output but text says 15V. This will lead to future issues. It is better to have a simple separate 12V LPS for the device.
I would not do so (changed quite a few other types) but when you know the current to the load and when it is low it can be done. NOT with a dropping resistor but by changing a resistor of the internal LDO.
Then you will have a P50 with 12V output but text says 15V. This will lead to future issues. It is better to have a simple separate 12V LPS for the device.
Propably D50 linear supply works on TPS7A4700 regulators, so you can adjust the output voltage as you need. Just some work with solder
It is a shame that the brightest minds of the DIY community are unwilling or unable to devise a test that detects the sonic changes from different powers supplies in these situations. In the meantime the rest of us will have to rely upon our engineering knowledge and trust our own perceptions. Hey ho! 🙂🙂
I've tried batteries off and on over the last 10 years and to me they are a pain in the neck (subjectve of course) and also noisy particularly under load. Unlike SMPS supplies they are unlikely to push noise back onto the mains though.
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