ohhh.. i can see that, ur most experience person in audio. I can bet u did very well. Ill give it a try for the protection when i`ve complete 2kw class -h from diysmps groupbuy. Its not hard to build just need few component to complete the module. I`ll post the result. I need to wait couple of week to receive last part.
So back to discrete amp, this amp is amazing, i can bet its cheap too. You can build one pergo, make it single sided pcb i`ll check for the component for ya. Stewin did well but with double sided pcb, but no one yet here include protection probably for shortcircuit into this ucd.
regards,
Azmi