I am very proud about what we accomplished on TPA3255. My goal , since the beginning of this project , was to make a great sounding amp.
What we have achieved in THD is comparable to Purifi and Benchmark. At -118 (1Khz , 8R , 10W) even objectivists will agree its not audible.
As I said...it was not my project goal to achive best THD+N. Because of my "obsession " with reducing noise , THD has improved as a byproduct, to DAC like levels.
You will understand why it took longer and why I say "my focus is on SQ " next week.
I am sufficiently advanced into project and I will explain my design choice.
What we have achieved in THD is comparable to Purifi and Benchmark. At -118 (1Khz , 8R , 10W) even objectivists will agree its not audible.
As I said...it was not my project goal to achive best THD+N. Because of my "obsession " with reducing noise , THD has improved as a byproduct, to DAC like levels.
You will understand why it took longer and why I say "my focus is on SQ " next week.
I am sufficiently advanced into project and I will explain my design choice.
Competitive against which monoblocks? Icepower monoblocks? Hypex NCore (NP) monoblocks?
And a somewhat random question - any thoughts on a TAS3251 amplifier for dedicated digital input?
Competitive not only with hi end..but also vs competitive vs mid .
Digital input , I am starting work..will be a while
We have discovered a novel way to eliminate H distortion in class d.
Basically , inductors stores energy in magnetic field . Class D amps (full bridge) have " dead time" between phases. For a short period of time inductor energy has no outlet. (dead time)
We were thinking that this energy must interfere and create noise. So we have designed a small circuit that shunts the energy (only during dead time) to a R
We started the test a few days ago. Very fast it became apparent on AP machine that something great was happening especially at 2-10W. However , our engineers team (not audiophiles and usually not prone on commenting on SQ) reported that sound seemed to change for the better . Its rare that they comment on SQ..
On AP , we have seen a 3 to 6db reduction on H (2-10W) 1Khz , 4R . That is a lot .
I have not heard it myself , but we have changed the board and sent the new file to manufacturer. Will do more test on EMI , higher power etc...but it seems that we are on to something..
Basically , inductors stores energy in magnetic field . Class D amps (full bridge) have " dead time" between phases. For a short period of time inductor energy has no outlet. (dead time)
We were thinking that this energy must interfere and create noise. So we have designed a small circuit that shunts the energy (only during dead time) to a R
We started the test a few days ago. Very fast it became apparent on AP machine that something great was happening especially at 2-10W. However , our engineers team (not audiophiles and usually not prone on commenting on SQ) reported that sound seemed to change for the better . Its rare that they comment on SQ..
On AP , we have seen a 3 to 6db reduction on H (2-10W) 1Khz , 4R . That is a lot .
I have not heard it myself , but we have changed the board and sent the new file to manufacturer. Will do more test on EMI , higher power etc...but it seems that we are on to something..