“ I originally purchased this case for my Sennheiser HD25 headphones, but found it was slightly too small for them. I shared photos of the attempt on the HD25 appreciation thread. So, I started using them for my Audio-Technica ATH-M50s and I couldn't be happier by the results. As you might know, those are full sized headphones that collapse down into a tight bundle. And...” --ButtUglyJeff
High-end offering from German headhpone company 'Manta' (manufactured by Calrad Imports Inc.*) in 1974. *Reference Needed Impedance Rating in Ohms 4.0 minimum and 16.0 maximum Frequency Response Range Hz 30.0 to 15000.0 Headset Cord Length 84.0 inches nominal Earphone Element Type Dynamic Earphone Cushion Material ...