Sennheiser PX 100 Casque pliable ultra rare, neuf dans son étui NEUF jamais utilisé 
Nominal impedance: 32 Ohms
Jack plug: 3.5 mm stereo
Telecommande
Transducer principle (Headphones): dynamic, closed
Ear coupling: supraaural
Cable length: 1.4 m
Weight (w/o cable): 60 g
Frequency response (headphones): 10 to 21,000 Hz
Sound pressure level (SPL): 115 dB (SPL)
THD, total harmonic distortion: 0.1 percent