Just finished an LM4780 amp using the Audio Sector boards. The amp is built into a Harmon Kardon Citation 12 chassis. I am using simple MOSFET based regulators to lower the power supply voltages to the chips. The amp boards are wired in parallel mode and are used in a biamped system. It powers a pair of GPA Altec 414-8c woofers. Before putting the finished amp in the biamped system, I played it awhile into a pair of transmission line speakers ("Pass" TLs with 8 inch full range drivers) and it sounded really good. This one is a keeper. Thanks!