On the other hand, I would have liked no integrated Bluetooth. I already have APTX-HD Bluetooth.
For me too but I had no better results with linear supplys. Now there are differences in SMPS supplys though.
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I just connected one of my linear supplys because I was on the fringe with the 24Volts batteries. With the 12Volts battery the amp did not start.
I must admid I really like what I hear and I don't think I will purchase yet another SMPS.
With my TPA3116 and Tripath TK2050 I had better results with SMPS but the MA12070 seems to like linear supplys. Go figure.
I Still got some nice Cree rectifiers and Sikorel caps to build a supply worthy for this chip.
I must admid I really like what I hear and I don't think I will purchase yet another SMPS.
With my TPA3116 and Tripath TK2050 I had better results with SMPS but the MA12070 seems to like linear supplys. Go figure.
I Still got some nice Cree rectifiers and Sikorel caps to build a supply worthy for this chip.
You sure write contradictory things 
The issue with some ideas is that we humans tend to solve all problems with the same solution. This is because of our assumptions. As a tech one quickly learns that assumptions are the mother of f***ups. You see it with the output filtering and now with a LPS that assumptions based on TPA3116 don't lead to success.
As a tech I would also never endorse the use of lead acid batteries in normal homes. Results with a good linear PSU are equal or even better and for sure they are safer.
Many amplifiers with MA12070 work OK with 19V. Many very good regulators have an upper limit of 20V. That is why I feed them 19V and check if the 5V circuit will accept 19V. I can do with only a few Watts of output power. The quick route is to use LT1084 but better PSUs can be made.
The issue with some ideas is that we humans tend to solve all problems with the same solution. This is because of our assumptions. As a tech one quickly learns that assumptions are the mother of f***ups. You see it with the output filtering and now with a LPS that assumptions based on TPA3116 don't lead to success.As a tech I would also never endorse the use of lead acid batteries in normal homes. Results with a good linear PSU are equal or even better and for sure they are safer.
Many amplifiers with MA12070 work OK with 19V. Many very good regulators have an upper limit of 20V. That is why I feed them 19V and check if the 5V circuit will accept 19V. I can do with only a few Watts of output power. The quick route is to use LT1084 but better PSUs can be made.
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I shure have respect for techs but the final judge is my ears.You sure write contradictory things
That I have different results driving different
Chips with different supplies is not a contridiction it's called synergy.
Blank statements like linear supplys are always better is just not true and it has been prooven time and again in this D-amp Forum.
If I could reduce the volage of my monster smps I would give it a try.
And regarding Lead Acid Batteries, millions of people sit for 8-9 hours a day right next to them without knowing it(APS). Glass Matt Gel Batteries have been the standard in Backup Systems for the last 30+ years.
Next try will be Lifepo4 with 210 A spontanious Delivery.
When all those electric cars have sucked the life out of our grid I will be grinning listening to great AC-less Sound😁
MA12070 performs good with LPS. Tested and tried out hence the choice.
I work on a daily basis with industrial quality SLA batteries in high numbers and in high power applications. Also there is either 13.8V or 27.6V which are both simply inadequate for this chip and thus category "just doing something". Therefor no lead acid batteries in my home.
I work on a daily basis with industrial quality SLA batteries in high numbers and in high power applications. Also there is either 13.8V or 27.6V which are both simply inadequate for this chip and thus category "just doing something". Therefor no lead acid batteries in my home.
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What hassle? Do you mean the remark "Decent way of creating a low noise 5V for DVDD." or the batteries?
Just like it says. There are various ways in Chi-Fi devices how the 5V is created. It is not about what is in front of the 5V regulator, it is about the (often switching) 5V regulator itself and if it still works OK at 19V (which is lower than usual) or the very low 13.8V of a SLA battery. Also if it is low noise as that makes a difference.
In relation with the lead acid batteries: two in series and fully charged are 27.6V which is higher than the absolute maximum voltage of MA12070. If you hate your loudspeakers and/or amplifier go ahead. One battery is 13.8V which is too low for many 5V switchers as designed in these devices to work at all.
IMO it is not that hard to understand.
Just like it says. There are various ways in Chi-Fi devices how the 5V is created. It is not about what is in front of the 5V regulator, it is about the (often switching) 5V regulator itself and if it still works OK at 19V (which is lower than usual) or the very low 13.8V of a SLA battery. Also if it is low noise as that makes a difference.
In relation with the lead acid batteries: two in series and fully charged are 27.6V which is higher than the absolute maximum voltage of MA12070. If you hate your loudspeakers and/or amplifier go ahead. One battery is 13.8V which is too low for many 5V switchers as designed in these devices to work at all.
IMO it is not that hard to understand.
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I get all kinds of Batteries for free because of my Job. It is very expensive to get cleaner power then from the right kind of battery for the Job.
The digital side of my dac has 3.2v Lifepo4
The analog side did not sound very good with 6.4v Lifepo4 but my LT3045 regs for this job are in turn fed by 9.6v Lifepo4.
As soon as I complete my overnight charger, I will try Nickel Cadmium on various places.
No reg in the world can approach NC Batteries.
The digital side of my dac has 3.2v Lifepo4
The analog side did not sound very good with 6.4v Lifepo4 but my LT3045 regs for this job are in turn fed by 9.6v Lifepo4.
As soon as I complete my overnight charger, I will try Nickel Cadmium on various places.
No reg in the world can approach NC Batteries.
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I don't understand what's the problem, to replace whatever step-down converter that is used to generate 5V, to be replaced by 2 linear regulators. Those will sport very low noise in comparison to any other method mentioned here.
But well, I don't understand the usage of batteries for an amplifier as well, those, if I'd ever consider to use batteries, would have their place at the signal generator.
But well, I don't understand the usage of batteries for an amplifier as well, those, if I'd ever consider to use batteries, would have their place at the signal generator.
Sorry if I missed it earlier, but what is the linear power supply you are recommending? I was going to throw this amps on that audiophinics Ma12070 module you posted earlier: https://connexelectronic.com/product/smps300rs/For me it is about price/quality ratio with emphasis on the latter item so no SMPS for instance. I would like to see that design when it really costs 20 Euro. A quality design in all aspects with best parts for the purpose, no gadget like device. The nice thing of Chi-Fi is that many only got to know this chip because of the cheap gadget devices that lack a necessary feature here and there
Rethink that one
Nesha, do you have a link? Seems they knew how to design a device.
However, I would love to know if there is a better performing option for this price, or less. Thanks in advance!
The link is to an SMPS so not my cup of tea. I use my own design but a good quickie are the PCBs by Aleš. Provided you have LT1084 that is as these are hard to find. Sorry not the most convenient answer but in my case I found a full rail of LT1084 in the wonderful TO-3P package. As the gerbers are posted here somewhere I had the PCBs made and they were very cheap and perform well. No CLC and other extras but a simple small PCB that delivers a ripple free 5A with relatively low losses when LT1084 is used (also use higher rated TO220 Schottky diodes and adequate heatsink). Beware! Maximum input voltage of LT1084 is 30V.
Like the ones in the first picture. I always forget the member name of Aleš so the search is for you.
https://www.diyaudio.com/community/threads/for-sale-slb-mini-reg-boards-mini-me-phono-pre.387344/
I gave up finding the 7.5A version LT1083 as these are nearly always fakes. The audiophile community in China is a firm believer in the qualities of these ICs and since they are out of production (WHY?) they are copied in large numbers but with mediocre performance and high failure rate. If you like I can post a picture with a fake and an original one.
Brain fart: it is Aleš Mravlak
Like the ones in the first picture. I always forget the member name of Aleš so the search is for you.
https://www.diyaudio.com/community/threads/for-sale-slb-mini-reg-boards-mini-me-phono-pre.387344/
I gave up finding the 7.5A version LT1083 as these are nearly always fakes. The audiophile community in China is a firm believer in the qualities of these ICs and since they are out of production (WHY?) they are copied in large numbers but with mediocre performance and high failure rate. If you like I can post a picture with a fake and an original one.
Brain fart: it is Aleš Mravlak
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