Here you go:
100v:
Gray+White
White wire from the ACplug+Brown+Green
117v:
Gray+White
White wire from the AC plug+Blue+Purple
240v:
Blue+White wire from the AC plug
Purple+Gray
Someone find me a set of broken 009's and I can figure out what the fuck is going on with the newer Stax. No way I'm going to rip open my sets..
This has to be an issue with the new PEEK diaphragm material though. Properly heat-treated and high tension mylar as Stax have used is very stable indeed. They could also have changed the coating materials as PEEK has very different properties compared to mylar.
The amps can't get CE certification with exposed tubes. No way around that so most have an "optional" tube cover which nobody buys.
That amp looks like something from ETF so hardly commercial.
I've been down this road before and it is a dangerous way to DIY, as in I have these two parts, let's spend 400$ on parts for it...
As for those specs, the M3? It uses a single brick psu but sounds pretty shitty thanks to the rail splitting.
Ahhh yes, let's use some old carbon comp resistors and caps which are way past their sell by date. Yup...sounds like a plan.
The Riken and Koa's are pretty nice though but miles away from the old stuff.