I experience a quite noticeable hiss from my A50+ when i listen to rather quient parts of music independent of the source (almost no hiss if no music at the input- guess there is a treshold). Any idea whats the main cause of that and how I could fix it - power supply, amp hardware (e.g. decoupling capacitors) or anything I could maybe fix via the ACP workbench (i use EQ)?
I have the version of the A50+ with the TPA3116 configuration.
Would be great if you guys maybe have an idea where to look first.
Many thanks in advance,
Update: added additional 1200uF at the input and 1uF ceramic decoupling capacitor for the TPA3116. The hiss when there is no music playing (caused by the power supply) is now completely gone but that was not the problem as it was rather quiet anyway. The hiss while music is playing still is still more or less the same. It also stays rather constant independent of the volume. Any clues?
Also is it possible to get the schematic or at least the part of the output filter because I’m thinking of replacing the ceramic caps at the output with foil capacitors?