1. SMPS1200A400 Output Voltage Vaux are +20.5V -20.5V , I use the TPS7A4700 TPS7A43300 regulated to +15V, -15V, Eval2 asking the 15V input .
2. this idea come from ergo at #87
http://www.htguide.com/forum/showthread.php?44316-Purifi-class-D-amplifiers/page3.
3,4 Thx,Good advice, I didn't...