Best affordable Linear Power Stage

This Audiogon thread might be useful: https://forum.audiogon.com/discussions/linear-tube-audio-little-known-great-linear-power-supply

Or: https://www.lineartubeaudio.com/accessories

Fidelizer Audio just released their Aura for $219. Technically, it has a switching power supply to keep the price affordable. The owner, Keetakawee, has a track record of designing excellent products. For a true LPS, look at his Nikola series He provides excellent product support. He'll be happy to answer any questions.

For further reading: 

https://audiobacon.net/2021/08/06/the-worlds-best-audiophile-linear-power-supplies/7/

I am sure the best available power supplies are available inside audiophile equipment. 

Lots of nice ones out there, all depends on price willing to pay. I always go with lps that can provide more amperage than device requires, much better for reliability, keeps heat down.

@ghdprentice There are many reasons why outboard linear power supplies superior to either inboard supplies or devices that use external switching power supplies. If we're talking about streaming equipment, many devices designed to use outboard power supplies, certain manufactures understand the intended use of the device and/or their own limitations in designing and manufacturing high quality linear power supplies. Many of these manufacturers are small operations, they specialize in a single thing, let others take over for the lps, put the two together and you have a quality device.