On January 18, 2021 at 13:32, Brad Humphrey said...
???
Do you not understand how a digital amp works? The power supply is usually some form of PWM (Pulse Width Modulation) and so to is the output. It varies the power output based on the length of the 'on' times vs. the 'off' times in the modulation.
So running an 8ohm speaker, you can get say 100 watts by the 'on' time being at 100% duty on the modulation. And running a 2ohm speaker, you also get 100 watts because it is running at 25% duty on the modulation.
It is how it limits the power output to operate within safe parameters.
The above is overly simplified but should get the picture.
But you even mentioned 'safe parameters' and it's important for the manufacturers to avoid telling users that any impedance is fine. The output section still has limits, so if the amp starts to struggle, power will be reduced.
I wasn't thinking in terms of hitting the lowest power output and using PWM- I was looking at it more like we do with other amplifiers, where the power should increase as the impedance drops.
