??? Of course the pinout differs for the TAS5613 and that's why JohnY said it won't work when you replace it with a TPA325x, quote:
"Also to those of you who are convinced PA5 used certain chip [the TPA325x], you can hot air replace one onto it and see if it functions normally. It can not would not."
TAS5613....
This 10-year-old chip .... I think you are getting lost ...
A revolution with old chips ...
This 10-year-old chip .... I think you are getting lost ...
A revolution with old chips ...
Topping will have good reasons why they chose this chip. Those reasons are unknown to us, of course.
It is yet to be verified .... Whether it is this chip ...
I highly doubt it.
It's clear ... If it's this chip ... I'm not buying!😕
I highly doubt it.
It's clear ... If it's this chip ... I'm not buying!😕
We must go in the direction of technological evolution ... Class D is constantly evolving.
Recent chips have certainly corrected the faults of their elders.
If not, research and development will be irrelevant ... No😢
Recent chips have certainly corrected the faults of their elders.
If not, research and development will be irrelevant ... No😢
Unless the evidence photo was photoshopped (and the poster who posted it was a sock puppet of Topping trying to seed misinformation) I see no reason for doubt.
Whatever chip is used - the secret may be found in a very clever way to apply postfilter feedback. And yes, the TI proposals of PFFB are not that great.
I’ve been a little cautious when interpreting the results from the scientific site, have seen the worst external smps supplies used there to test DACs, was something left over from a rechargeable power tool or something.
That likely wouldn’t be as much of an issue with a TPA32XX, but still causes me to take the charts and graphs with a grain of salt.
That Topping amp looks like a decent product, making the best of the TPA chip.
That likely wouldn’t be as much of an issue with a TPA32XX, but still causes me to take the charts and graphs with a grain of salt.
That Topping amp looks like a decent product, making the best of the TPA chip.
D
Deleted member 148505
On the picture of the chip used, you can clearly see the pinout of xVDD supplies, the IO and ground pins as well as other components. The circuit is pin by pin compatible with TPA325X.
If you replace it with TAS5613 it will go into flames since PVDD supply and speaker out pins are different.
You need to find another chip that is pin by pin compatible with TPA325X because the board pinout and PCB trace is for TPA325X.
Yes looks like it is well protected in the potted section.
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Avez-vous lu ce qu'on m'a dit à propos de la puce ? Vous pouvez également vérifier à partir de ASR > Tpa325X .
Hi Jlester,
What would you guess under the D01 black box ? Some differential OP amps ?
I think you have more expertise than mine ... Topping kept this part a secret.
Under the PCB, we count 9 pins under the D01 box :
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Well, now we know for sure that any "reviews" / listening test from you can be safely ignored.
They are obviously biased by your technical insight (correct or not) of the thing infront of you.
//
I see you point wrt pinout, checked it and stand corrected.
The marking we see in the evidence photo is not the model marking (which has been sanded off), it another marking (date/lot code etc) that happened to similar to the TAS5613 but not quite (as it reads 56131 and not 5613 alone)
Another 3255 pic with that additional code, appearing to be 56163
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Neck to neck? Absolutely not. ONE single parameter is better, and it is indeed impressive, but it offers a fraction of the power, and distortion is worse elsewhere, and it raises significantly more with frequency. Do not misunderstand me, the PA5 is a little miracle, but it is obviously not in the same league as proper Purifi 1ET400A implementation and the Benchmark AHB2. Not even remotely.
Scientifically it's true .... but I doubt your ears will be able to measure what a measuring instrument perceives .... If I blindfold you and place the 5 best amps in the ASR ranking, I can make sure you won't see any difference.
Would you be ready to spend 1400 euros to dispose of the imperceptible?
My last question is : do you own the Purifi ? Do you own the AHB2 ?
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The producer boldly admits that he has no idea how it works. The only guess is that the energy of the signals causing the unpleasant sound in the varnish is converted into micro-vibrations and, consequently, into heat. Lubricate the transistors, converter, single-circuit amplifier, wait a few days and enjoy the tube sound of your equipment.