As you can see years back Stereophile used to show with (top) and without the AP low pass filter, and it’s always used at very low power.
Today they never show the square wave "without" the filter in line (bottom), which is not representative what’s coming out of the speaker terminals.
https://ibb.co/MnK3mcm
Today they never show the square wave "without" the filter in line (bottom), which is not representative what’s coming out of the speaker terminals.
https://ibb.co/MnK3mcm