Sennheiser Cable Box HMD 280 PRO User Guide

HMD 280 pro  
Headsets | Communications Headset  
Cat No. 004976  
General Description  
The HMD 280 pro headset has been specially designed for communica-  
tions in high-noise environments. Its dynamic, super-cardioid microphone  
has been optimised for close talking distances.  
Technical Data  
Headphones  
Transducer principle..............................................................dynamic  
Ear coupling ........................................................ circumaural, closed  
Frequency response ....................8 – 25,000 Hz (–10 dB / 1 kHz)  
Sound pressure level.............................102 dB (as per IEC 268-7)  
Attenuation .......................................................................max. 32 dB  
Nominal impedance ...............................................64 per system  
Load rating.................................................................................. 0.5 W  
THD............................................................................................ < 0.1 %  
Contact pressure.............................................................. approx. 6 N  
Weight (w/o cable).....................................................approx. 310 g  
Microphone  
Transducer principle..............................................................dynamic  
Frequency response .................................................50 – 13,500 Hz  
Pick-up pattern ...........................................................super-cardioid  
Sensitivity (free field, no load, 1 kHz).............................. 1 mV/Pa  
Nominal impedance ................................................................. 200 Ω  
Connections  
Connection cable...................................unterminated coiled cable,  
min. 1 m/max. 3 m  
Features  
Noise-compensated microphone with extremely low handling noise  
Microphone can be worn on either left or right-hand side  
Easily replaceable, single-sided coiled cable  
Very good attenuation of background noise  
Space-saving design with rotating earpieces  
Replaceable parts for long life  
Microphone frequency response (near field)  
measured with B&K 4219 artificial mouth  
-50  
-55  
Lightweight design  
-60  
-62.5  
Delivery includes: 1 HMD 280 pro  
1 windshield  
-65  
-70  
dB  
(V/Pa)  
-75  
-80  
-85  
Replacement Parts  
-90  
Ear pads (1 pair)  
Headband padding  
Connection cable  
Windshield  
Cat. No. 085733  
Cat. No. 083321  
Cat. No. 082072  
Cat. No. 083411  
-95  
-100  
90  
200  
500  
1k  
2k  
5k  
10k  
20k  
Hz  
Microphone Pick-up Pattern  
Product Variants  
HMD 280-13: as HMD 280 pro, but with 300 Ω  
headphone impedance  
HMD 281 pro: as HMD 280 pro, but single-sided  
headphone, weight (w/o cable): approx. 245 g  
HMD 281-13: as HMD 281 pro, but with  
300 headphone impedance  
Cat. No. 004977  
Cat. No. 004978  
Cat. No. 004979  
 

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