Arny Krueger wrote:

"Eiron" wrote

That's an impressive damping factor.
I wonder how the frequency response of headphones changes
when current-driven rather than voltage-driven.

The impedance curves of headphones are documented on the web, and are
typically pretty non-uniform.

Probably why so many people like dedicated headphone amps, and drive them
from low impedance, low voltage sources.

Studios tend to use standard power amps.

Graham