The Studio version of these classic hi-fi stereo headphones uses XXL speakers with Varimotion diaphragms for higher sensitivity, a wider dynamic range, and higher sound levels. Other features include semi-open earphones, a solid bass range, clear highs, and excellent comfort. Also connects to portable equipment (CD players, DAT recorders, notebook computers, etc.)
 Features:
     - 55 ohms impedance, plug-in cable 
    - Self-adjusting headband for optimum fit
    - Single cable for ease of use 
    - Semi-open, circumaural design
   
 Specifications:
   - Type semi-open, dynamic headphones, circumaural 
   - Sensitivity 91 dB/mW, 104 dB/V 
   - Frequency range 15 to 25,000 Hz 
   - Rated impedance 55 ohms 
   - THD <0,3 % 
   - Max. input power 200 mW 
   - Connector gold plated stereo mini jack 
   - Adapter stereo gold plated mini to 1/4" screw-on adapter jack 
   - Net weight (without cable) 240 g (8.5 oz) 
   - Special features plug-in cable 
   - Patent(s) Varimotion - multiple-thickness diaphragm for dynamic transducer (Patent no. AT 403.751, US 6,185,809, EP 814.637 (DE, DK, FI, FR, GB, IT, NL), JP 3.927.651); Acoustics slot resistor for dynamic transducer (Patent no. AT 408.706, US 6,639,991, ZL 01116806)
  
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