To replace the 7V transformer (AC) with a DC PS, you'll need 12V and bipolar (+ / -) as Chris said. I use Reflektor-D to power the ISO 3.3V pin, which is often fed from the 3.3V out of the Amanero. I've verified this; upgrading to a Reflektor-D here improves sonics.

I use the SSR03 to provide the bipolar 12V in my build. While you can use two 'D''s in a bipolar configuration, it's designed to only supply between 3.3V - 7V. A couple of BIB's would work.

Dear MisterRogers,
Thanks for the heads-up on the Reflektor-D kits. I have some clarification I hope you can help with.
I'm currently running the R-2R with Amanero and 1 toroidal xformer 2x7V 7W. If I am to order the Reflektor-D, I only need 1 kit that comes from the xformer and feeds to the J3 of the R-2R, correct?

Yea, that's pretty crazy. Just PM's you with a deal - you'll need to decide fast as I have another buyer. Comparing the Reflector-D / BIB; the D is very focused, specifically built to produce the best wave in the range that matters most to digital. It's low parts count helps keep noise very low. BIB is more dynamic, and thus better for analog.

To replace the 7V transformer (AC) with a DC PS, you'll need 12V and bipolar (+ / -) as Chris said. I use Reflektor-D to power the ISO 3.3V pin, which is often fed from the 3.3V out of the Amanero. I've verified this; upgrading to a Reflektor-D here improves sonics.

I use the SSR03 to provide the bipolar 12V in my build. While you can use two 'D''s in a bipolar configuration, it's designed to only supply between 3.3V - 7V. A couple of BIB's would work.

Thanks MisterRogers. Just ordered myself a Reflector-D kits. How much do you suppose the SSR03 improve the performance compared to a diyink PS or a transformer?

Here is my take:

Looking at the AMB a20 would you recommend this? is there anything else that doesn't go stellar in price? (only class A solid state)

I found out that Lampizator sells kits and built boards, if funds allow i'm gonna try one out.

Lampizator kits