AQVox AQ-SWITCH-8

[maxijazz]

SMPS power supplies inherently have higher leakage currents and emit more noise than a good LPSU. That's the major reason many people (like me too) avoid them in their systems, they can cause issues in the system whether they improve the device they're powering or not. The last time someone convinced me his SMPS would be alright (this was Alex of Uptone Audio with the Regen) I was treated to a slight high frequency shimmer riding the highs so away it quickly went! This could have been system dependant BTW, perhaps I suffered from it because of my P3 Power Plant. For leakage currents to have less damaging effects you're best of with a very low impedance AC feed sharing the same earth. So a non filtering power strip connecting all equipment would be best in this case.

Of course there's good and bad PSU's of both types so it's just a general rule of thumb.

So very true. 
I bought iFi 5V for Chord Mojo and experienced the "high frequency shimmer" every time i powered the DAC. I was very disappointed and delegated iFi to power Raspberry Pi with HiFiBerry Digi+ where it is dead silent. 
I guess there must be something wrong with power lines in Mojo. Its creator many times expressed, that he does not recommend listening when using external PS. While he pointed out increased internal DAC temperature in such scenario, but now i think there is something more to that.