Any power supply introduces noise. Linear PS is also switching (at max voltage). The question is how much noise? They had to have a reason to implement SMPS. Switchers are usually used for their efficiency when high currents are required or for size when Linear PS takes too much space (wall-warts). It is neither case so I thought there was a third reason - they can be designed to be extremely quiet, much quieter than Linear PS. Otherwise why do it? It is more expensive and more complicated than Linear PS, that has just few very cheap components. There must be a reason. Phono stage has RIAA correction that amplifies low frequencies. It is +20dB@20Hz and likely +12dB@120Hz. It is likely that it is also sensitive to low frequency power supply noise (120Hz) - common for Linear PS.
How important is a Linear Power Supply Versus a Switcyed one?
I recently purchased a used Sutherland Insight phono stage to replace the built in one in my Plinius8200 MK II integrates amp. I was amazed at the improvement in openness and presence. It comes with a switched power supply but there is an option for a Linear Supply for about 35% of what I paid for the Insight ($350). I have a Van den Hul One Special cartridge (if that matters). Is it worth it?
- ...
- 28 posts total
- 28 posts total