I just received a response from the owner or P.E. and thought you guys may find it helpful:
"Hello! Per your questions:
- Ember 2 is actually cheaper than the old SC model. We do not offer discounts as we already sell for the lowest price possible
The new version 2 Ember features:
- Line out disconnect when using headphones
- Input attenuation module for customizing input levels (not needed most of the time)
- Supercharger circuit built into the amplifier
- Revised layout and design
All of our designs can use both 6 or 12v miniature dual triode tubes. This just gives more options for tube rolling. Ember is auto sensing so just plug a compatible tube in and it will change settings automatically! 6v or 12v does not mean either is better, just different voltages on the heater circuit is all"
Thanks Asr for your help. I was asking about the P.E. version 1 because there are still some floating around new & used on the likes of eBay, and I would be really stretched thin to afford $350 for version 2 + ad'll tubes. I could just use the older posts in the tube rolling thread to find a suitable tube for the old version.
But from this email, I still don't know what a supercharger is or if the newer version makes much difference, and contrary to what he said I can find the old one for about $60 less.
I'll advise you to go for version 2 because of the added input attenuation module. The power of the Ember v.1 was a bit too much IMO for some headphones including high impedance ones like Senn HD 650. With the new module the Ember will be more useful with low impedance phones as well. When you add to that and the supercharger I think is well worth it.