Sennheiser Headphones 09969 User Guide

Publ.: 21.08.2003  
Headphones & Accessories 1  
HD 650  
Open, circumaural headphones  
Cat. No. 09969  
Description  
The audiophile HD 650 is the ultimate in open, dynamic headphone  
design. Developed from the award-winning HD 600, the HD 650s  
feature improved materials for even better sound reproduction. They  
captivate the listener with their expressiveness and emotion while  
maintaining absolute precision and lifelike reproduction. Enjoy sound  
in perfection!  
Features  
Hand-selected, matched headphone systems with  
very tight tolerances (+/- 1 dB)  
Computer-optimised magnet systems for minimising  
harmonic and intermodulation distortion  
Extremely lightweight aluminium voice coils ensure  
accuracy and fast transient response  
Neodymium ferrous magnet systems for high  
efficiency  
Specially developed acoustic silk provides uniform  
damping over its entire frequency range as well as  
minimising intermodulation and harmonic distortion  
Elegant silver-titanium finish  
High-quality metal mesh covers for superb open and  
transparent sound  
Extremely natural, spatial sound image  
Balanced, crisp bass and deep bass reproduction  
Authentic voice reproduction  
Specially developed OFC copper cable,  
Kevlar-reinforced, insensitive to handling noise  
Gold-plated ¼” jack plug with adaptor lead to 3.5  
mm jack plug  
2-year guarantee  
Technical data  
Nominal impedance  
Contact pressure  
Weight w/o cable  
Jack plug  
300 Ohm  
ca. 2,5 N  
ca. 260g  
6,3/3,5 mm stereo  
open, dynamic  
Transducer principle  
(Headphones)  
Ear coupling  
Cable length  
circumaural  
3 m  
Frequency response  
(headphones)  
10.....39500 Hz  
Sound pressure level  
(SPL)  
103 dB (1 Vrms)  
0,05 %  
THD, total harmonic  
distortion  
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Sennheiser Headphones 09969 User Guide