Has anyone ever seen any spice models for headphones? Maybe even cables? I have some HD600s with 25ft Cardas cables. I would love to have or make a spice model for this combo. So I can put something into my simulations a little more accurate than just a simple 300 ohm resistor. I want to see how the complex reactance influences circuit performance. Some of the circuits I am playing with are so high speed, and prone to oscillation, that it may look stable with a straight resistor as the load, but may in fact become unstable with a realistic load. If there is a fairly simple way to make the model based on measurements? I have at my disposal a high quality dmm, 20MHz oscope, signal generator, and obviously a computer. Perhaps something using Right Mark Audio Analyzer? I would even be willing to pick up some inexpensive gear to get the job done.