fordski
500+ Head-Fier
How high does the impedance need to be? So you connect headphones, impedance adaptor, and extension together first, then plug into the phone, play music, then take out the impedance adaptor and plug the headphones straight into the extender?
I believe some people are using a 75 ohm adapter with success to get into high impedance mode.
And yes the method you mentioned for connecting is correct. Once the phone sees the full load you can disconnect the headphones and impedance adapter as long as you leave the extender plugged in the phone.