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

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.

Over the last year I also built the Amp Camp Amp kit. It's fun-value and performance were so good I immediately moved on and built the B1 Korg preamp kit. That was before they had a full kit available for the B1K, but they now have a complete kit similar ACA kit. I also added an internal LPS to the B1K along with improved Caps and other components.
I then took the next step and built an F5 amp using the Pass Linear PS boards and the PCB and parts kits available for the build from DIYAudio. I am extremely impressed with the performance of these relatively simple amp designs. And the cost/performance factor is unequaled IMHO. It ain't like falling off a long to do this, especially the F5 build, but that's the challenging fun part. I highly recommend this experience.