I did some testing of my own with my ZA3 and two Mean Well power supplies: LRS 350N2-36v and LRS 350-48v. Using a 4/8 ohm resistor load and oscilloscope, increasing gain until I see the output clipping (40hz sinewave). My results: (per channel)
The 36v PS was adjusted to output 38v: 4ohm x2 -...