Implemented? Its literally just hooking up a power supplyDecided not to vote in order not to skew results.
It's clearly a very good amp module, but as a DIY proposition I'd never know if I had implemented it correctly.
Impressive and, for me, one to watch out for if suppliers start offering finished units ... although I'd still look for measurements of those implementations.
It does feel that very high quality amplification is getting cheaper. That's fantastic.