This can be bought on Amazon.
https://www.amazon.se/lägesfilter-E..._tag=se&qid=1734382007&s=industrial&sr=1-1037
SMPS - DC in - EMI filter - DC out - tpa3255 module
Any opinions of the sound quality , measurements?
https://www.amazon.se/lägesfilter-E..._tag=se&qid=1734382007&s=industrial&sr=1-1037
SMPS - DC in - EMI filter - DC out - tpa3255 module
Any opinions of the sound quality , measurements?
I just understood that I need smth like this - I have full TPA3250 amp, which is hissing a lot. And has some very very silent, bus still heard buzz at around AC frequency - 50Hz. I am not sure it is SMPS type though.
Is it correct, that this basically makes ugly and noisy AC/DC converter into expensive and shiny one?
Is it correct, that this basically makes ugly and noisy AC/DC converter into expensive and shiny one?
Or build Tombo56's linear PSU and be done with it. I have the previous R21 modified as PSU and it is very good.
Switchers are nice, switchers are light, switchers are small and switchers are cheap but if you are after quality there is better stuff. Switchers are like cutting your finger deliberately to be able to try out a band aid (the filter).
Switchers are nice, switchers are light, switchers are small and switchers are cheap but if you are after quality there is better stuff. Switchers are like cutting your finger deliberately to be able to try out a band aid (the filter).
If your amplifier is producing a hissing sound, this is NOT the solution. Hissing may result from pre-amp noise, a poorly designed oscillator structure, or component deterioration causing a pole or zero shift that pushes the oscillator into the audio band. Again, this is not the solution.
I may do that. Just to see if I can hear any difference.
Maybe Im just curious about any eventually advantage in soundquality with such a filter. Im sure there are tradeoffs - a filter will have higher resistance that ”direct” coupled smps, so maybe dynamics will suffer ?
…or maybe Im trying to fix something thats not even a problem. - no noise from my amplifier as it stands.
Im also a bit sceptical about using coils in such a filter - according to Rod Elliot its the worst possibly passive component.
You are feeding an EMI transmitter with an EMI transmitter 😀 Coils are friends but expensive friends that sometimes speak an intellectual language we rarely understand.
zek, here it is. R25 is expensive to build though but quality has a price: https://www.diyaudio.com/community/...nd-super-regulator.420933/page-3#post-7874923
I ordered boards so if you want one please say so. I only have on hands experience with its predecessor R21. The board designs by Tombo56 are eh.. special but the designs are sound.
zek, here it is. R25 is expensive to build though but quality has a price: https://www.diyaudio.com/community/...nd-super-regulator.420933/page-3#post-7874923
I ordered boards so if you want one please say so. I only have on hands experience with its predecessor R21. The board designs by Tombo56 are eh.. special but the designs are sound.
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That ~50Hz buzz is smaller when I change power supply of the same voltage from more expensive amp. Cannot say at the moment if there is less other freq artefacts, but the difference in unwanted noises can be heard.
I am pretty new describing different unwanted noises with exact words. Yes, in my case hissing and 50/60 hum can be heard. But I am not sure about exact frequencies for the hum type sound. Also additional research needed if the unwanted sounds are generated by the amp and its accessories, not before the amp.
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Its just a Low Pass Filter to block a high freq noise. If your PSU good enough, there is no need use this filter