Sennheiser    
On Ear DJ Headphones    
HD 25    
The HD 25 is very lightweight and comfortable, even if used for long periods. Considered to be the "Industry Standard" for DJ Headphones, these headphones are often found in DJ Booths, small and large, around the world!    
    
    
    
Overview    
"Due to their low weight and the option of one-ear listening, the HD 25 headphones are indispensable for mobile monitoring. The closed-back HD 25 are purpose-designed, professional monitoring headphones offering high attenuation of background noise.
 Capable of handling very high sound pressure levels and of extremely robust construction, these headphones perform exceptionally well in loud environments, e.g. ENG, sound reinforcement, studio monitoring and audio equipment testing. Ideal monitoring headphones for cameramen and DJs, these are a pair of true sound professionals’ working headphones."    
    
    
Features    
"High sensitivity due to lightweight aluminium voice coils
 Capable of handling very high sound pressure levels
 Very lightweight and comfortable, even if used for long periods of time
 Tough, detachable, single-sided cable
 Rotatable capsule for single-ear listening"    
    
    
What's in the box?    
"1 HD 25
 1 Screw on jack adapter 3.5 to 6.3 mm
 HD 25 Plus only: 1 Pouch
 HD 25 Plus only: 1 additional pair of soft earpads
 HD 25 Plus only: 1 additional 1.5m-3m straight cable"    
    
    
    
    
Technical Data    
Color    black
Frequency response (Headphones)    16 - 22000 Hz
THD, total harmonic distortion    < 0,3 % 
Contact pressure    ~ 2,5 N 
Ear coupling    supraaural 
Jack plug    3,5/6,3 mm stereo 
Cable length    1,5 m (HD 25 Plus: 1-3 m)
Transducer principle    dynamic, closed 
Weight    Without cable: ~ 140 g
Nominal impedance    70 Ω
Load rating    200 mW 
Max. Sound pressure level (active)    120 dB