plastic penguin said:
Vladimir said:
Human hearing loudness curve. The speakers and the amp don't really need that much a welly up. Our hearing does. Speakers that are not FR flat and have a coloration, may favor lower listening levels (frowny face) or louder listening (smiley face). If a speaker sounds detailed and clear at lower listening, it may be too bright and harsh when turned up louder.
It's the Goldilocks dilema.
Eh?! What?! I've got squiffy hearing!
More seriously, there are squillions of these hi-fi graphs/studies, and very few IMO can be backed up in a normal living environment -- no doubt have a lot credence in a controlled environment, such as a lab.
The phenomena these curves illustrate is very well known and the reason for all those ill-named 'loudness' buttons that were so common on amps in the 1970s and 80s. Obviously people just pressed the button and left them on permanently along with maxed out bass and treble and some quite bizarre shapes on their graphic equalizers (the 'Brontosaurus back' * was a popular one).
If they'd been called 'quietness' buttons instead (and designed to cut-out automatically above a certain volume) things might have been better.
The Naim Unitiqute has a switchable contour for low level listening that adjusts to volume and cuts out automatically in this way.
* Apatosaurus for all those under 40.