I've heard great things about the Teddy Pardo PSUs, but I've also had very good luck with the KingRex supplies as well. Unfortunately, the price has risen with the MKII upgrade--which I don't think is significant enough, sonically, over the MKI on the AR devices to justify the upgrade, but that's just me.
Whatever PSU you choose, try experimenting with power cords on the supply. You might be surprised.
As a lower-cost (but still very effective) alternative, possibly contact Jennifer Crock at Jena Labs. She does a fairly inexpensive filtration tweak to the stock wall wart that, in my experience, is as effective as many linear supplies I've tried. I use that on my second Schumann device.
Whatever PSU you choose, try experimenting with power cords on the supply. You might be surprised.
As a lower-cost (but still very effective) alternative, possibly contact Jennifer Crock at Jena Labs. She does a fairly inexpensive filtration tweak to the stock wall wart that, in my experience, is as effective as many linear supplies I've tried. I use that on my second Schumann device.