I have to break up my post due to the restriction on posting more than 5 photos, so continuing with the modde power supply
The white box is the time delay relay which can be programmed for almost any delay time. The circuit puts a resistor in the primary of the transformers limiting start up current to the 180,000 mfd of capacitance.
The power supply has a switchable ground reference of 5 ohms, direct to earth, and floating (cap coupled). I use 5 ohm currently and have no hum issues. The power connector is a 6 pin Neutrik gold plated XLR connector, so that V+,V-, and GND for each channel can be delivered to the amp.
