HMEC 25-6A block diagram

Technical data NoiseGardHMEC 25-6A / -KAP-2

Headphone

boom

microphone

microphone

amplifier

headphone

capsule (left)

compensation

circuit (left)

compensation

microphone (left)

compensation

 

headphone

microphone (right)

 

capsule (right)

 

 

 

 

 

 

 

 

compensation

 

 

circuit (right)

Transducer principle

dynamic, open, supra-aural

Frequency response

16 Hz - 22 kHz

Impedance active/passive

200 / 180 Ω (mono)

 

400 / 360 Ω per side (stereo)

 

same volume for active and passive

THD

< 1 %

Compensation active

15 dB ± 3 dB between 100 Hz and 2 kHz

Frequency response of

 

the active compensation

50 - 600 Hz

Microphone incl. preamplifier

 

6-pin

Redel

plug

HMEC 25-KAP-2 block diagram

Transducer principle

Noise-compensated back-electret condenser

 

microphone capsule

Frequency response

300 Hz - 5 kHz (as per RTCA/DO-214)

Max. sound pressure level

120 dB

Output voltage

400 mV ± 3 dB at 114 dB

 

and a distance of 6 mm

 

(as per RTCA/DO-214)

Terminating impedance

150 Ω

boom

microphone

microphone

amplifier

headphone

compensation

capsule (left)

microphone (left)

compensation

circuit (left)

compensation

 

headphone

microphone (right)

 

capsule (right)

 

 

 

 

 

 

 

 

compensation

 

 

circuit (right)

 

 

 

Operating voltage

typ. 16 V DC, approx. 8 - 25 mA,

 

connections as per RTCA/DO 214

General data

 

Contact pressure

approx. 2.5 N

Weight without cable

170 g

Cable

single-sided, total length 1.8 m

Connectors HMEC 25-6A:

6-PIN Redel

HMEC 25-KAP-2: headphone: 6.35 mm (1/4") jack plug

 

microphone: PJ-068, 5.25 mm

Power supply NoiseGard™-

12 - 35 V DC

Current consumption

typ. 18 mA

PJ 068

6,35 mm

plug

plug

16

17

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Sennheiser HMEC 25-6A manual Technical data NoiseGard Hmec 25-6A / -KAP-2, General data

HMEC 25-6A specifications

The Sennheiser HMEC 25-6A is a high-quality aviation headset designed specifically for pilots and air traffic controllers who demand superior performance and comfort. This headset is part of Sennheiser's long-standing tradition of excellence in audio equipment, combining advanced technology with rugged durability.

One of the standout features of the HMEC 25-6A is its noise-canceling capability. The headset uses high-quality dynamic microphones that provide excellent voice clarity while effectively eliminating background noise. This is especially critical in noisy environments such as cockpits or control towers, where clear communication is essential for safety and efficiency. The noise reduction technology ensures that pilots and controllers can communicate clearly, even in the loudest of conditions.

Comfort is another key aspect of the HMEC 25-6A. The headset is designed for extended wear, making it ideal for long flights or shifts. It features a lightweight design and plush ear cushions that provide a snug fit without causing discomfort over time. The adjustable headband ensures that users can find the perfect fit, which contributes to both comfort and effective sound isolation.

In terms of sound quality, the HMEC 25-6A excels with its high-fidelity audio reproduction. This feature enables precise sound monitoring, which is crucial for pilots when making critical flight decisions. The headset also comes equipped with a flexible boom microphone that can be adjusted for optimal positioning, ensuring clear transmission of instructions and communications.

The durability of the Sennheiser HMEC 25-6A is noteworthy as well. Constructed with high-quality materials, the headset is designed to withstand the rigors of aviation use. From its robust cables to its weather-resistant design, the HMEC 25-6A showcases Sennheiser's commitment to producing reliable products that last.

In addition to its impressive technical specifications, the HMEC 25-6A is also compatible with various aviation communication systems. This versatility allows it to be used in different aircraft types, providing flexibility for both professional and recreational pilots.

Overall, the Sennheiser HMEC 25-6A is a top-tier aviation headset that delivers exceptional sound quality, comfort, and durability. Its advanced noise-canceling technology, high-fidelity audio, and user-friendly design make it an excellent choice for those requiring a reliable communication tool in the aviation field. Whether for commercial pilots, flight schools, or aviation enthusiasts, the HMEC 25-6A is engineered to meet and exceed expectations in demanding environments.