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

@dgarretson - you can test these Zerozone power supplies stock, but you can also upgrade the power cord and the fuse.  In addition, I upgraded my DC output cables as well.  I used a 5.5mm x 2.1mm DC plug from Digikey:

https://www.digikey.com/product-detail/en/switchcraft-inc/767KS17/SC1389-ND/2238432

And 16awg UTP VH Audio cryo-treated OFC hookup cable w/ AirLok insulation below:

https://www.vhaudio.com/wire.html#ofcairlok

The results of the DC cable upgrade were significant.  I kept the DC connector on the power supply side because it's hard to find the correct size replacement. I just de-soldered the existing cable and solder on my VH Audio wire.

@auxinput  Thanks for this info.  In past projects I have build DC umbilicals with 10-11awg silver wire, Furutech connectors, and tinned copper braid shielding.  I'll keep all options in mind.

@dgarretson - What Furutech connectors did you use?  I don't see any DC connectors made by Furutech.  The best I have seen is the Oyaide ones below:

https://www.vhaudio.com/connectors-rcaxlr.html#OyaideDC

But they are gold-plated, which slows down and warms up the sound.  I chose the switchcraft ones because of this. 

As far as wire, I prefer pure copper (my preference) because silver can be a little to fast/sterile for me.  I can't imagine trying to solder 10-11awg wire to these tiny DC connectors! lol.

@auxinput - Woops, the connectors are indeed Oyaide-- for the ACA, 2.5 ID x 5.5 OD (based on the Meanwell data sheet spec.)
I do a custom build to 10-11awg with a twist of 20awg .999 dead soft silver strands from Rio Grande on-line.  IME, with DC the higher the gauge and shorter the length the better.  For terminations to small connector tabs, extend 2-3 strands out of the bundle to make the solder junction.     

I've been experimenting with a bunch of sources and preamps over the last few months.  

  

@jayh - I built these with my kids as well.  Our second or third project.  Even my 7 year old participated.

System photo:
https://drive.google.com/file/d/1RG7oFzBtF1pH-ViMwFv83GhkWPTNIU6-/view?usp=sharing