Sennheiser HMD 25-1 Communications Headset

Sennheiser Updated: 2009-01-07 RSS
Sennheiser HMD 25-1 Communications Headset

The HMD 25-1 headset features dynamic, closed headphones giving excellent attenuation of background noise, and an MD 414 super-cardioid close-contact dynamic microphone. It has been designed specifically for use in noisy environments.


* Mircrophone with superb transmission qualities
* Very light
* Two-piece padded headband, exceptionally comfortable
* Microphone can be worn on either left or right-hand side

Delivery Includes

* 1 HMD 25-1
* 1 MZW 414 windshield

Technical Data

Transducer principle: dynamic
Ear coupling: supra-aural, closed
Frequency response: 20-16.000 Hz (Headphone)
Sound pressure level (SPL): 102 dB(SPL) +- 2dB at 1kHz, 1mW
Nominal impedance: 600 Ohm per side
Load rating: 200 mW
THD, total harmonic distortion: <1 %
Contact pressure: approx. 3,3 N
Weight w/o cable: approx. 190 g
Frequency response: 100-16.000 Hz (Mikrophone)
Pick-up pattern: super-cardioid
Sensitivity in free field, no load (1kHz): 1mV/Pa
Min. terminating impedance: 1000 Ohm
Connection cable: 1,8 m, steel cable, tin-plated open ends