Which Class D Amplifier? PS Audio, Ghent, Nord, Merrill or other???

Hello Tim, Bruno Putzeys has left Hypex more than two yers ago, and as far as I know, he is not involved at this time with NCore technology development.

He has since founded a new company, called Purifi:

https://www.purifi-audio.com/

And within Purifi Bruno is developing new class D technology.... No, as far as I know, Putzeys may not be applying GaN transistors in his new design.

Saluti, G.

Tim,

The input stage on an amp is not an output stage.  Output stages have to drive a speaker, so you would not want current limiting.  The input stage is just an op amp.  Most integrated circuit op amps cannot drive over 100ma.  They are using a discrete op amp that can drive 250ma.  In fact, the circuit will never need much current at all.  As all that will come out of it is a few volts and driving maybe 5K load.  They are basically bragging about their discrete op amp.  The spec has very little to do with sound.  You could have a circuit that could only drive 50ma that could sound better.