The way I see it, the TPA3255 is basically the holy grail for 99% of people out there. We already see that noise and THD performance can be under the point of audibility in most situations, and it also happens to be extremely cost-effective relative to its performance and with Class D power efficiency to boot. The only thing that's an unknown, to me, is the IMD performance with the latest designs, but that will be answered as soon as JLE/JLP sends a module to ASR.
Amigos,
TPA3255 is the "today" amplifier. As I said, Gan will be the "tomorrow" amplifier. We must understand by revolution, a change or an evolution to what we are already producing )
Doc, I guess you confirm that your next Gan is better than your actual TPA3255 ? you put the chip in my ear)
If GaN is going to be the next big thing, there has to be a compelling reason(s) for it to be considered a revolution... not just inching further on the scale of diminishing returns. Efficiency? Cost? Distortion? Size? Noise? Anything that we can hear, or are we just chasing smaller and smaller numbers at this point?
Hard to quantify what "revolution" means but I suggest that an improvement of minimum 3-5x on an important metric would be adequate.
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This is what I have mind.... HAHAHAHAHA butt I haven't found appropriate graphene/capacitor bank yet.
😱
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Well, maybe it's a language thing.
Revolution | Definition of Revolution by Merriam-Webster
: a sudden, radical, or complete change
b :
c :
d : a fundamental change in the way of thinking about or visualizing something : a change of paradigm the Copernican revolution
e :
Revolution | Definition of Revolution by Merriam-Webster
: a sudden, radical, or complete change
b :
c :
d : a fundamental change in the way of thinking about or visualizing something : a change of paradigm the Copernican revolution
e :
6.67Khz
hahaha...funny pic
Since the beginning of this design , I have wondered about the peak of 6.67Khz
True to our roots , we made hundreds of tests.
So those are my findings :6.67Khz is the last frequency that has both 2 and 3H (public knowledge). Its the highest frequency where you can see still h2/3 in 20Khz bandwidth.
However , distortion rise is seen staring at around 3Khz. After 6.67Khz is does not vanish and in fact it goes up to 20Khz.. this rising harmonics at 3 , 4 and 5Khz its right in the middle of most sensitive area of human hearing.
You can use feedback to attenuate partially . However one of my principles for the design is to correct each non linearity locally .. it is my firm belief that's the holy grail to SQ.
We found the solution .Using the right components , connected to the right (no noise) plane with the correct size loop . We see very small variation between THD at 1 and 6.67Khz .
One small step in a long journey.
hahaha...funny pic
Since the beginning of this design , I have wondered about the peak of 6.67Khz
True to our roots , we made hundreds of tests.
So those are my findings :6.67Khz is the last frequency that has both 2 and 3H (public knowledge). Its the highest frequency where you can see still h2/3 in 20Khz bandwidth.
However , distortion rise is seen staring at around 3Khz. After 6.67Khz is does not vanish and in fact it goes up to 20Khz.. this rising harmonics at 3 , 4 and 5Khz its right in the middle of most sensitive area of human hearing.
You can use feedback to attenuate partially . However one of my principles for the design is to correct each non linearity locally .. it is my firm belief that's the holy grail to SQ.
We found the solution .Using the right components , connected to the right (no noise) plane with the correct size loop . We see very small variation between THD at 1 and 6.67Khz .
One small step in a long journey.
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Wouaaaaaaa ) Well done for this fine analysis!
Cdsgames : are you going to claim a nationality for the production of the modules? I guess you designed it but mass production will be Asian?
Audiophonics made me laugh by tagging their Hypex amp "made in France" ... rather to say" assembled "in France. It is as if they have appropriated the Hypex patent !
It may sound silly to you, but transparency says a lot about intentions)
Cdsgames : are you going to claim a nationality for the production of the modules? I guess you designed it but mass production will be Asian?
Audiophonics made me laugh by tagging their Hypex amp "made in France" ... rather to say" assembled "in France. It is as if they have appropriated the Hypex patent !
It may sound silly to you, but transparency says a lot about intentions)