The NC-300-L is a headphone designed for airport ground handling. Based on the NC-300 model, the design provides high levels of external noise suppression and clear, noise-free voice communications - critical parameters for the safety of airport personnel and servicing of machinery. The NC-300-L has a long list of optional components that allow you to customize the design for specific stages of operation.
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|Noise reduction method||Passive|
|Passive noise suppression||-26dB|
|Speakers frequency response||20-17000 Hz|
|Speakers impedance||150 Ohm (mono), 300 Ohm (stereo)|
|Speakers effectiveness||101 dB|
|Microphone type||dynamic with noise cancellation (basic model)|
|Microphone frequency response||100-8000 Hz|
|Microphone impedance||220-2200 Ohm|
|Microphone sensitivity||-33 dB +/-4 (basic model)|
|Connector type||PJ 051, (M642/2-2) basic model|
|Volume control||Yes, independent L/R|
|Mono / stereo switch||Yes|
|Detachable cable (multi pin connector)||Optional|
|GA microphone preamp||Yes|
|Ear seals type||Gel|
Headphones NC-300D are equipped with a microphone arm of the hybrid construction - part fixed to the shell has a wire skeleton and a microphone was placed on the gooseneck boom. Both elements combines the hinge. This construction allows you to keep all the advantages of both design solutions while eliminating their main drawbacks. More than a design such a wider range of adjustment which significantly improves the ability to properly adjust the position of the microphone. Attaching the arm to the body provides a metal collar with pressure adjustment. The microphone arm rotates 320º angle that allows to decide which side a cable will placed. In the product options (above) you can alternatively select another type of arm.
Headband in NC-300-L is made of chrome-plated steel. Its size is adjustable by means of two knurled screw. The headband features a new, very comfortable topsoft velcro, which facilitates its replacement in case of damage.
The NC-300-L headphones are available as a dual-shell model, as well as only single shell (for left ear) and the foot at the right side - the version used mainly for de-icing. Optional modification also includes speaker inserts and soundproofing components. For example, there is only one speaker system in the left shell and no speaker and soundproofing components in the right. In addition, the shell without the speaker may in this case be unsealed by the appropriate incision allowing to listens a background noise.
You can also configure the listening volume in several ways. In addition to the no-atjusting version, three other variants are available: with a common potentiometer on the left or right shell, and with independent left and right ear regulation. The latter has a separate potentiometer on each shell, but that one on the right containsadditional switch that allows you to adjust the volume only with the left potentiometer (the same volume in both shells) or left and right separately.
The base version of the NC-300-L has a 5m cable terminated with PJ051 (M642 / 2-2) plug ( the Airbus and Boeing standard) with built-in handpiece equipped with a PTT button. Optionally, the PTT button can also be placed on the right shell. It is also possible to increase the length of the cable in personalizatio, as well as the selection of the cable profile (straight or spring) connecting the handle to the shell.
NC-300-L is equipped with a standard gel earpads. Located inside semi-liquid silicone ensures a perfect fit to the head. "Gels" is the only reasonable solution for people who want or need to wear glasses - their elements will not be hurt at the site of contact with the earpads. More than that your package includes soft, made of cotton overlay material mitigate the effects of prolonged contact of skin with an airtight surface of the gel inserts. Color overlay material is chosen randomly. Optional gel pads can be replaced with a sponge - less comfortable but more resistant to damage
NC-300-L has passive electronics, which includes speakers with bandwidth 20-17000 Hz, and dynamic microphone with noise compensation.
As an optional for model NC-300-L offer specially tailored transport bag. For her performance was used waterproof nylon 1680D, and the bottom and side walls sewn thick sponge to protect the handset from damage during transport.
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