Here's nice images of the Ffh.39d headphones.
http://auction.military-antiques-sto...tion_id=100215
Regarding the impedance - considering how the cable is connected over the headband, those 54 ohm capsules could be either in series or in parallel so i hope someone is able to clear this out...
http://auction.military-antiques-sto...tion_id=100215
Regarding the impedance - considering how the cable is connected over the headband, those 54 ohm capsules could be either in series or in parallel so i hope someone is able to clear this out...
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