Why does a dent to a tweeter not affect sound quality?

It is mainly for protection and air leaks. When the cone is modified a phase plug either fixed to the cone or stationary can be used. There is a place for weezer tech too.

Very interesting phase plug tech, I use it. Mine are stationary.
The cone bore vs phase plug gap is very important (air leaks cause noise) Phase plug length and the tip configuration is # 1 in mechanical distortion control for any inverted cone driver

I always thought domes in the center of a cone were for the the sound waves coming back on the cone. Just like covering the WHOLE surface with a dome. Its not so much for the waves going OUT but more so for what’s coming back. That is where the measurements will get wiggy if they are crunched.

As far as fixing domes I’ve fixed hard domes that have cracked and soft domes (or rings) that were torn. Nail polish makes quick work of that problem. A few strands of insulation fiberglass and cover the crack.

DENTS pull them out with tape and if they are bad use a sharp dental pick (or two) and if you manage to poke a hole, a little dab will do ya, of what ever you like.. Nail polish to Flex Seal, it ALL works fine.

I repaired 2 different set of QLS1s. I got pretty good at fixing some weird ones.. I think they were ringed mids. 20 + years ago. That was a great speaker Infinity QLS1 Ribbons and domes.. The wires would delaminate from the domes and of course 50% were smashed in and a few 10 penny nail holes. I think they are still in service. Surrounds 4-5 times. They had a servo model too.. These weren't

Wait when weezers come back they will be all the rage, how to add a weezer to your speaker.. :-)

Regards

My ears are not good enough to tell, but it can be measured. Are you talking about whizzer cones, oldhvy?

Yep fiesta75, that's them all right. They look weird but they sure work.
I used 12" Eminence 103 E in a Mids column not Mid Bass mids..
2500 hz and down, that weezer sure helped with the beaming.

 Using a 12" at that high of frequency have glaring mids. A lot better dispersal pattern and smoothed everything right out.. 
Helped with cone break up too.
A Weezer cone. Yup.

I gotta finish that project come to think of it.

Pioneer made a very popular one too 51/2 or 61/2 with a weezer. A lot of the old boxes used that driver or copied it.. Great driver.

I'm pretty sure Tannoy Concentrix drivers used them.. Seas..

My wife sister jumped right through my right channel Maggie on LSD. She have crazy vibe for music and I since get difference setup for living room and move Maggie to gym system.

It usually does not affect the sound but it does show a lack of care and taking care of the speaker which can be worrisome.