solderdude
Grand Contributor
That small particular rise is not in any relation to the considerable different drop in response caused by aging or abuse.The original post was that a certain demographic would buy this amp because it has a rising HF response that matches their hearing loss.
I know about the high output impedance, so if the speaker should have a falling impedance at high frequencies (wait for it...) it would correct the amp!
if it is a rising impedance, then it wouldn't. In either case, that was not the question.
When a speaker has a lower as well as higher impedance the amp will change it's output voltage but in the wrong direction. So an impedance hump will ensure the output voltage rises even higher which is exactly what is not desirable.
A lower impedance will result in a lower than desired/intended output voltage so also exactly what one does not want (in the light of signal fidelity).