Sennheiser HMEC 250 Headset

Sennheiser Updated: 2009-01-08 RSS
Sennheiser HMEC 250 Headset

The HMEC 250 is a Headset for General Aviation.

Features

* Outstanding transmission quality for clear communications
* Good passive attentuation
* High attenuation due to effective active noise compensation Noise Gard
* Talk-Through function allows direct communication in the cockpit
* Collapsible design for space-saving storage and transportation
* Noise-compensating boom microphone ensures excellent speech transmission
* Flexible microphone boom arm
* Separate left and right channel volume control
* Peak-Level-Protection safeguards your ears from volume peaks above 110 dB
* Excellent comfort resulting from soft ear pads and headband padding
* Audio-Input facility for external audio sources: mobile phones and MP3-Players

Delivery Includes

* Headset HMEC 250
* Carrying bag for the headset
* Cable clip
* 2 wind and pop screens
* User manual
* Audio-In cable 0,60 m, 3.5 --> 3.5 mm jacks
* Audio-In cable 0,60 m, 2.5 --> 2.5 mm jacks
* 2 batteries for the NoiseGard headphones (AAA)

Technical Data

Transducer principle: dynamic, closed
Ear coupling: circum-aural
Frequency response (headphones): 8 - 28.000 Hz
Nominal impedance: passiv: 150 Ohm mono/ 300 Ohm stereo; active: 600 Ohm mono/ 1200 Ohm stereo
Sound pressure level (SPL): 98 dB SPL - 1 kHz, 1 mW / 100 dB SPL - 1 kHz, 1 V (passive/active)
THD, total harmonic distortion: <1 % at 95 dB SPL
Attenuation (active + passive): passive: 13 - 34 dB, active: 16 - 25 dB
NoiseGard-Supply: 2 x AAA cells (alkaline recommended)
Contact pressure: approx. 8 N
Transducer principle (Microphone): electret-condensor, noise-compensated
Frequency response (microphone): 350 - 6.000 Hz
Output voltage: 400 mV at 114 dB SPL / 40 mV/Pa (adjustable from 17 - 100 mV/Pa)
Operating voltage (stand alone): 8 - 16 V DC
Connection cable: single-sided round cable, length 1.85 m
Connector: 6,3 mm - headphones, 5.25 mm - microphone
Weight w/o cable: approx. 285 g
Operating temperature: -10 °C - +55 °C
Storage temperature: -55 °C - +55 °C