AKG K-55

Specifications
Type: closed-back, dynamic headphones, circumaural
Efficiency: 114 dB SPL/V
Frequency range: 16 to 20,000 Hz
Rated impedance: 32 ohms
THD: <1 %
Max. input power: 200 mW
Connector stereo: mini jack
Adapter: mini to 1/4" adapter jack
Weight  210g