[sdiy] Headphone impedance modeling for Spice simulations?

[Mattias Rickardsson]

Hi,

after noticing sudden HF-oscillation noises with some headphones in a
headphone amp when switching op-amp manufacturer, I'm curious about how
headphones actually work if you'd want to simulate them properly in Spice.
Their resistances can be very different from model to model, but how about
their capacitive or inductive behaviour? They are loudspeakers after all,
so I guess they are not the nice flat resistive load that you might hope.

Do you know any good models or equivalent circuits for headphones?

Here's one of the very few that turned up in my googlings, but I have no
idea how correct or relevant it is:
http://af6ea.blogspot.se/2015/08/op-amp-headphone-amp.html
It would be super if headphone manufacturers would supply this information,
but I haven't seen it done.

/mr
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