Winding the primary on Aesthetix Atlas Amplifier power transformer. Over 1 1/4 pound (.5Kg) of 13AWG copper for this winding alone! This is one of five magnetic components in Atlas, this 1.5kVA transformer is dedicated to the high current bipolar output section, and feeds a massive choke input filter network. "It is one of only a select few power amplifiers ever manufactured using a solid state output section coupled with a choke input filter network. Most companies avoid this due to cost and difficulty...but for us, the sound quality improvement is worth it!"