Any amplifier will perform the same way for this kind of sweep test. What is more important about LM3886 is it's THD+N performance and this couldn't be done via this setup. However, using you computer AUX input with some attenuation and proper software, you can easily manage to do this kind of tests. Spekaer output will pump in the required sweep with clean waveforms. A decent Sound card might even add some icing on the cake. But definitely a proper reponse test you tried to explain not like others who invariably show woofer cone movements. That's kind of rubbish. Waiting to see more videos like this.
Yes Brother … even I wanted to test the distortion performance of the amplifier . And the easiest way to test THD is to send a signal with a pilot signal induced in it , so that we can check and compare the harmonics in FFT mode of the scope . But my scope doesn’t have FFT in it 😞. But Yeah I really need to figure out something to test the THD in a cheap and easy way .
@@Roys_Desk You cant have proper result unless you sample the signal with higher resolutions. Normal scopes or even standalone scopes are only 8 bits so can't get the right result. better way is to use sound card. Search THD measurement with sound card borgmann
@@Roys_Desk In case if you are passionate about Audio then search QA403 Audio Analyzer. That's the best Audio analyzer tool in affordable price. There are so many available Pro grade Analyzer from Keysight or R&S but they are beyond the reach for most people
Nice
Thanks 👍
First comment
Appreciate it brother 😊😊😊😊😊
Any amplifier will perform the same way for this kind of sweep test. What is more important about LM3886 is it's THD+N performance and this couldn't be done via this setup. However, using you computer AUX input with some attenuation and proper software, you can easily manage to do this kind of tests. Spekaer output will pump in the required sweep with clean waveforms. A decent Sound card might even add some icing on the cake. But definitely a proper reponse test you tried to explain not like others who invariably show woofer cone movements. That's kind of rubbish. Waiting to see more videos like this.
Yes Brother … even I wanted to test the distortion performance of the amplifier . And the easiest way to test THD is to send a signal with a pilot signal induced in it , so that we can check and compare the harmonics in FFT mode of the scope . But my scope doesn’t have FFT in it 😞.
But Yeah I really need to figure out something to test the THD in a cheap and easy way .
@@Roys_Desk You cant have proper result unless you sample the signal with higher resolutions. Normal scopes or even standalone scopes are only 8 bits so can't get the right result. better way is to use sound card. Search THD measurement with sound card borgmann
Sure … will check this out
@@Roys_Desk In case if you are passionate about Audio then search QA403 Audio Analyzer. That's the best Audio analyzer tool in affordable price. There are so many available Pro grade Analyzer from Keysight or R&S but they are beyond the reach for most people
Hi Roy,
any plans of making speaker protection circuit video in future
Hey … yes yes I sure do have plans to make speaker protection circuits.
@Roys_Desk I used C1237HA from aliexpress, all fakes. So something based on transistors would be preferred with pcb layout