Dreaming of a DIY 8W Class A amp designed by Nelson Pass?

@lewinskih01 dual mono is really the way to go if you can. Each channel/board performs so much better when it's got it's own power supply. In my chassis I've got an f4 board on one side and a sissy sit (diy sit3) on the other. Left them both powered and just shorted the input on one side to do evaluation. The SIT amp got so much better when I finally unpowered the F4. Shocking really how much just having an amp pulling unchanging idle current off the shared power supply could impact the sound. 

And I found the exact same thing with the F4. I had built full mono blocks and was paralleling my inputs and outputs to double the current available to my speakers. Again, the sound improved when I went back down to a single board with it's own power supply. Didn't need the extra power at all. 

thanks for the input  @cal3713  and  @auxinput
FWIW, I wasn't thinking about these for powering an amp. Actually to power an audio pc or a DAC. I have a lab lps and can use a relatively inexpensive, decent looking lps if it performs well. I also liked they have several voltages to choose from.

Again, the sound improved when I went back down to a single board with it's own power supply. Didn't need the extra power at all.

Which is Pass' whole point, simpler is better.

An approach others have taken one way or another. CJ with their PV preamps for instance, and single driver speaker designs.

@lewinskih01 - that's not really the best power supply here on ebay.  You should search through all the Zerozone power supplies.  I think those are usually the better ones for an audio device such as DAC or preamp because they usually have better capacitors (such as Nichicon Gold Tune or Nichicon Fine Gold FG).  Such as this one:

https://www.ebay.com/itm/Zerozone-Finshed-S130-Ultra-Low-Noise-DC-Linear-Power-supply-2-way-LPS-12V-...


If you are looking to power an Audio PC, look at one of these (because they support all the voltages 3.3V, 5V, 12V):

https://www.ebay.com/itm/ZEROZONE-4-Way-Low-Noise-Hifi-Linear-Power-Supply-DC3-3V-5V-12V-12V-L9-30/1...

https://www.ebay.com/itm/TeraDak-high-power-850W-PC-ATX-Computer-linear-power-supply-output-3-3V-5V-...

The TeraDak is for a full blown tower with a very high 850W capacity and full ATC motherboard connector and power cable chassis, but it is very expensive.