Upon internal inspection as a comparison while repairing the es10,
I noticed they are not using any fiberglass material but two different color shiny foam looking material behind the driver.
The darker foam is in area of the bass ports.
Also by the way, the rear metal housing is the thickest I have seen on a headphone.
Makes both the es10 and Amperior and es7 metal seem less substantial.
I am also thinking the outer spiral designed may be more than just looks as spiral groove finish adds greater surface area as well as increasing rigidity and thus any possible resonance beyond the audible range..
Or it could just be my own placebo fallacy lol.
I noticed they are not using any fiberglass material but two different color shiny foam looking material behind the driver.
The darker foam is in area of the bass ports.
Also by the way, the rear metal housing is the thickest I have seen on a headphone.
Makes both the es10 and Amperior and es7 metal seem less substantial.
I am also thinking the outer spiral designed may be more than just looks as spiral groove finish adds greater surface area as well as increasing rigidity and thus any possible resonance beyond the audible range..
Or it could just be my own placebo fallacy lol.