[Trevor]

On 12/02/2019 10:31 am, geoff wrote:
So there is no truth in the old adage that distortion products of
over-driven valves are of predominantly even order harmonics which are
pleasing to the ear, as opposed to the predominantly odd-order harmonics
that resulting from the distortion from over-driving solid-state
devices, which are considered unpleasantÂ* ?

The truth is that for many decades there has been *NO* reason to
overdrive a solid state amp so the question is moot. However there are
still plenty of people who like the distortion from valve amps,
especially guitarists. As an *effect* it will always have a place it seems.