Best bang for the buck

@edinphiladelphia 

This is the sensible,  rational way to galvanically isolate your streamer setup.

Replacing the iFi wall wart SMPS with a proper linear regulated power supply might yield a small additional sonic benefit.

@devinplombier 

Don't disagree.  Of all the things I have done (aftermarket power cords, power conditioner(s), DDC, new DAC) this was the most impactful.  Not sure the bang for the buck is there for me.  That, and after absorbing the costs for upgrading my amp, preamp and speakers, I need to scrounge up some funds for room treatments.  I live in a loft and have an 18-foot high by 20-feet wide wall of glass and metal.  To cover it, I am going to need a theater-grade set-up and it's not going t be cheap. I keep my wall warts and TV on a separate power conditioner.  Since you mentioned wall warts, I use a Darlington Labs phono stage, and they recommend using their supplied wall wart.  

Had the chance to fire up my K&K Trio Phono Preamplifier recently, after years of sleep.It sounds wonderful, full stop. It was driving a Rega P/10, Ortofon Cadenza Black, in a system I’m intimately familiar and helped assemble and setup. Pretty cool.

The K&K being a sleeper if you can find one.

I just tried out my new Schiit Vestri using Amarra on my iPhone and driving a pair of Sennheiser HD650’s.

Holy crap, this is the best bang for buck ever. Superior to my Audioquest Dragonfly and actually competitive with my Woo WA6 driven by my Yggdrasil. I am impressed. $99

Other than buying lots of gear used, my WiiM Ultra is fantastic for the price.