LM3886 60 Watt Amplifier

On the manufacturer´s website, you can find an appnote, describing a parallel/bridge topology for quadruple output power. The appnote contains two alternative topologies: the first one is simple, the second one contains output DC error correction using a servo feedback. The funny thing is, there´s not just a single servo per channel - there are four of them, one for each power IC (probably to prevent high rail-to-rail idle current - to prevent the power IC´s from struggling with each other). Feel free to have your own opinion about the result - in my opinion it´s absurd poetry. If the goal was higher output power, then certainly it could be achieved in a formally and operationally cleaner way, and perhaps with less complexity.