I built 2 mono amplifiers using Icepower 700as1. They work well but there is a small issue. After about 13 minutes without any input signal, it goes into standby mode from operation and the red LED is on. Then if you turn off the AC power, the red LED keeps on for about 2 minutes. I know capacitors need some time to be discharged but this is still a little bit annoying, because it looks like the power is still on. Is there any simple and safe way to solve this issue? Or to make the LED fade out sooner?