Hi,
I would like to do a Class D amplifier, that means that there is a low pass filter at the input of the speaker. And I would like to have a good sound qualitiy, even if it is a Class D amplifier. The power output would be about 80 W (something like that). The source is an AC voltage source (50 Hz frequency). I would like to know if it is really important to do a PFC at the input in order to minimize electromagnetic interference and keep a gound sound quality. I mean that some interferences (without PFC) could interfere with the audio signal. (I cannot put the filter next to the speaker in order to limit the audio signal area). Even if I put the filter next to my speaker, the EMI interference will have a peak spike @ 100 Hz and I won't be able to filter it...
Nevertheless, I won't be able to "hide" the radiated EMI from the switching frequency of the PFC. So i will replace the problem by another.
What do you think ?
Thanks a lot
Léo
I would like to do a Class D amplifier, that means that there is a low pass filter at the input of the speaker. And I would like to have a good sound qualitiy, even if it is a Class D amplifier. The power output would be about 80 W (something like that). The source is an AC voltage source (50 Hz frequency). I would like to know if it is really important to do a PFC at the input in order to minimize electromagnetic interference and keep a gound sound quality. I mean that some interferences (without PFC) could interfere with the audio signal. (I cannot put the filter next to the speaker in order to limit the audio signal area). Even if I put the filter next to my speaker, the EMI interference will have a peak spike @ 100 Hz and I won't be able to filter it...
Nevertheless, I won't be able to "hide" the radiated EMI from the switching frequency of the PFC. So i will replace the problem by another.
What do you think ?
Thanks a lot
Léo
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