seanadams;162206 Wrote: > ...Just for completeness: I've also suggested that replacing the > external 5V feed is silly, because it does not reduce noise at the > internal power rails - those are internally linear-regulated _down_ > from the output of an internal switching _step-up_ supply. Changing the > wall wart does not materially affect the internal supplies which > ultimately power the DAC. > > As far as the power supply changes from SB2 to SB3, this was a design > optimization where a integrated dual switching IC for 1v2/3v3 supply > was replaced with a 1v2 switcher and a 3v3 linear reg for the digital > sections. It does not affect the analog rails.
I think this is very valuable information to make available here, thank you Sean. When I recently bought our SB3, I came here and read so many posts about the wall-wart, comparisons, etc. It can make a newcomer's head spin! I have read some posts here about the stock wall-wart producing significant RFI that can be radiated/conducted into the users equipment, enough to still negatively affect equipment sonically even when the wall-wart is just plugged into the wall (and unattached to anything else). The suggestion was that a linear replacement will help cure this, as it eliminates the switching source of the RFI. For example, 'here's a link to one such post.' (http://forums.slimdevices.com/showthread.php?p=158072#post158072) What are your thoughts on this possible RFI issue please? -- NewBuyer ------------------------------------------------------------------------ NewBuyer's Profile: http://forums.slimdevices.com/member.php?userid=7862 View this thread: http://forums.slimdevices.com/showthread.php?t=30501 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
