Hello Tom ;
I am using Toroidal transformer + Power - 86 for my mod-86 amplifier atm. I am planing to replaced Power - 86 with APEX regulated psu. (Pls see attached file)
I guess psu noise will be lower. Can i expect to get better THD+N?
I quote, from one of Tom’s original Modulus 86 design manuals:
The power supply rejection ratio of the Modulus-86 amplifier is truly excellent. Hence, the Modulus-86 performs as well on an unregulated supply as it does on a regulated supply. This is one of the benefits of the composite amplifier topology. The only advantage of using a regulated supply with the Modulus-86 is that the peak output power will be a few watt higher, as the regulated supply will experience less voltage droop as the load current is increased.
This is DIY, and of course you are allowed to experiment. But given the design topology of the Modulus series of amplifiers, I would spend time streaming more music and understanding that music has a crest factor and we as humans don’t typically listen to sine waves ;-)