Sennheiser Headphones HD 51 User Guide

HD 51  
Cat. No. 003512 HD 51-26-0  
Cat. No. 003511 HD 51-16-0  
Products for Industry | Stereo Headphones  
General Description  
The HD 51 is a pair of open, dynamic stereo headphones which are small,  
light, robust and comfortable to wear. The headband has extra padding  
for added comfort. The ear pads can easily be changed, and the headphones  
can be supplied with any company logo printed on them.  
Technical Data  
Frequency response .................................................18 – 20,000 Hz  
Transducer principle.................................................. dynamic, open  
Nominal impedance .........................................300 * as standard  
Characteristic SPL ................................................ 100 dB (at 1 kHz)  
THD ...............................................................................................< 1 %  
Ear coupling ......................................................................supra-aural  
Contact pressure ..........................................................approx. 1.3 N  
Weight (without cable)................................................approx. 55 g  
Connection cable.................................................1.2 m, single-sided  
Connectors  
HD 51-16-0................................. right-angled 3.5 mm stereo jack  
(ARiNC type A1)  
HD 51-26-0.....................right-angled 3.5 mm double mono jack  
(ARiNC type A2)  
Features  
Exceptionally light  
Compact design  
Robust  
Replaceable ear pads  
Superb frequency response  
Single-sided cable  
Choice of connectors (see Technical Data)  
Company logo option  
Recommended Accessories  
Ear pads (1 pair)  
Cat. No. 047299  
 

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