bạn có tham gia ASR đúng ko nhỉ? có ng VN tìm hiểu chuyên sâu như vậy, hay quá!

@trungqn1890

11 ай бұрын

Dạ mình cũng gọi là lượn lờ trên ASR và diyaudio forums thôi, chưa gọi là chuyên sâu gì đâu bác 😄

Hi. now in the datasheet I found that the carrier frequency is changed by the value of the resistor 10-30 kOhm. Did you manage to compare the sound at different frequencies? 450 and 600 kHz? should something else change in the circuit for the correct transition to 600 kHz? does it make sense to do this?

I have to ask, what is the purpose behind changing the operating frequency?

@trungqn1890

Жыл бұрын

As you see, class D using internal pwm to operation and that why they must have LC filter at output to cutdown the oscillating pulses. But LC filter could not clean it 100%, so line of power output does not strange or smooth like another amplifier class (class A, class AB). I just try to pull the pulses after LC filter as minimal as possible

Please share the parts list with me on ASR... I would really love to upgrade my A07 with these parts...

@trungqn1890

Жыл бұрын

Do you wrong video 😅

@Scrufboy

Жыл бұрын

@@trungqn1890 no... Just trying to communicate with you. We are both on ASR... You are posting in my A07 pro thread... I'm just reaching out.

@trungqn1890

Жыл бұрын

@@Scrufboy oh anyway thank you very much. compared to previous video, now i changed input capacitor before and after opamp to wima 2.2uf 50v capacitor, feedback capacitor to enla silmic ii 10uf 50v capacitor, change resistor to 1% error type and pot to log type 50k

@Scrufboy

Жыл бұрын

@@trungqn1890 Yeah, I'm a huge fan... You've done really great work on these amplifiers... Thanks

Hi, how did these changes affect the sound? And how can I do this, unfortunately I don't have an oscilloscope

@trungqn1890

Жыл бұрын

Hi it is one of the causes of noise floor and distortion at low volume. To change it, simple replace R freq follow datasheet

@peshcom84

Жыл бұрын

@@trungqn1890 Unfortunately, I can not find documentation for this amplifier

@trungqn1890

Жыл бұрын

@@peshcom84 it follow Ti tpa3255 datasheet

Which amplifier sounds better, Aiyima A07 or this new board?

@trungqn1890

Жыл бұрын

Original board is not good as A07, but could modified to get same