I was looking at the PSRR of LM3875 and I thought that it would make a perfect sense to use 2 ore 3 1000uF caps in parallel to the V- and only one 1000uF cap for V+ of the PS. This way I'd get better LF and HF filtering and thus compensate for the PSRR differences. Should have a positive effect (at least in theory).
Has anyone tried that?
/Greg
Has anyone tried that?
/Greg
Greg, when powering off the amp, the negative rail will have voltage a little longer.
And that may put huge DC on the ouputs.
Have you thought about this?
And that may put huge DC on the ouputs.
Have you thought about this?
Carlos,
No, I didn't think about that. Very good point. Though, if it really makes things better and it's worth the trouble you may have a relay that disconnects the speakers as soon as you power-off the amp.
Considering the above problem, it makes more sense to just increase both V- and V+ caps at the same time.
/Greg
No, I didn't think about that. Very good point. Though, if it really makes things better and it's worth the trouble you may have a relay that disconnects the speakers as soon as you power-off the amp.
Considering the above problem, it makes more sense to just increase both V- and V+ caps at the same time.
/Greg
- Status
- Not open for further replies.