solderdude
Grand Contributor
The conversion to sound waves is very flawed compared to electronics. Even the excellent Sennheiser HD 800 S converts a square wave of whatever frequency into a signal that is barely identifiable as a square wave.
Taking that into account, it's almost ridiculous how bad speakers and headphones are compared to electronics.
Above the 440Hz square-wave of the HD800, below the HD650.
The HD650 produce about the best squarewaves I have measured to date.