Sennheiser HMEC 300 manual Spare parts, Replacing the wind screen, Replacing the ear cushions, 134

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Spare parts

The following spare parts are available from your Sennheiser agent:

•Wind screen for MKE 45-1 electret microphone

•Ear cushions

•Headband padding

•Cable clip

•Carry and storage bag with shoulder strap

Replacing the wind screen

If the wind screen for the electret microphone shows signs of wear such as tears or holes, replace the wind screen. Pull the wind screen from the microphone. Gently slide-on the new wind screen and ensure that it fits securely over the microphone.

Replacing the ear cushions

Replace the ear cushions if they are damaged. Grasp behind the ear cushions and pull them up and away from the earcups. Slide the new ear cushions onto the earcups. For best results replace the ear cushions after 100 hours of use or two years.

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Contents Headset 111Preparing the headsets for use 128 112Safety tips 113Headset features Hmec 300 NoiseGard headset114 Product variants Hmec 302 NoiseGard headsetHmec 305 NoiseGard headset 115Hmec 305-C NoiseGard headset Hmec 306 NoiseGard headsetHmec 322 NoiseGard headset 116Hmec 400 NoiseGard headset Hmdc 322 NoiseGard headset117 Hmec 302, Hmec 305 and Hmec 306 headsets Delivery includes118 Recommended accessories Adapter cables except for Hmec 302, Hmec 305 and Hmec119 Connecting the headsets Connecting cables for headsetsHmec 322 and Hmdc 322 headsets Hmec 305-C headsetHmec 306 headset 121Powering options 122Connecting the headset to the on-board system 123Headset Hmec Headset Hmec 305-C124 LED operation and battery status indication Inserting / replacing the the batteries125 Connecting the headset, turning on the battery pack Attaching the battery pack to clothing126 Connecting the headset 127Preparing the headsets for use Adjusting the headband128 Positioning the microphone Relocating the microphone boomPositioning the microphone towards the corner of the mouth 129130 131 Using the headsets Adjusting the volumeTurning NoiseGard on/off 132Adjusting the microphone gain Folding up the headphonesAttaching the cable clip 133Spare parts Replacing the wind screenReplacing the ear cushions 134Replacing the headband padding 135Problem Case of difficultyPossible cause and what to do 136137 Valuable information on NoiseGard NoiseGard principle138 139 140 Connector assignment 141Technical data HeadphonesMicrophone incl. preamplifier HmecHmec General data 143Hmec Hmec 305-C Hmdc 144Hmec Hmec 305-C Hmdc General data 145Certificate of Conformity 146

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HMEC 306, HMEC 305-C, HMEC 302, HMEC 305, HMEC 322 specifications

Sennheiser has long been recognized as a leader in audio technology, and its range of aviation headsets reflects this reputation. The HMEC 302, HMDC 322, HMEC 305-C, HMEC 300, and HMEC 322 models are designed for pilots and aviation professionals, combining advanced features, cutting-edge technology, and high-quality sound performance.

The HMEC 302 is renowned for its passive noise attenuation, which effectively blocks unwanted ambient noise while allowing clear communication. This model includes comfortable ear cushions and an adjustable headband, making it suitable for extended use. The lightweight design ensures minimal fatigue during long flights, and the sensitive microphone guarantees optimal voice transmission.

On the other hand, the HMDC 322 integrates active noise cancellation technology, providing an impressive level of sound isolation. This feature is especially valuable in noisy cockpit environments, where distractions can impact concentration. The headset also includes high-quality speakers that deliver crystal-clear audio whether for communication or entertainment, ensuring that pilots remain connected without compromising sound quality.

The HMEC 305-C is designed specifically for commercial pilots and features a robust, durable construction. This model is equipped with a high-performance microphone that offers excellent speech intelligibility, making it ideal for communication in loud environments. Additionally, the HMEC 305-C includes a flexible boom arm that allows precise positioning of the microphone for optimal voice clarity.

The HMEC 300 model focuses on delivering exceptional comfort and function. Its plush ear pads and lightweight materials create a snug fit that is ideal for long flights. This headset also offers a high level of sound isolation, making it perfect for pilots who regularly operate in high-noise environments.

Lastly, the HMEC 322 shares many characteristics with its counterparts. This headset is tailored for users seeking both comfort and superior sound quality. The advanced cushioning and adjustable features ensure that the headset remains comfortable during extended usage, while its robust materials are built to withstand the rigors of aviation use.

Overall, Sennheiser's HMEC series represents a blend of advanced technologies, comfort, and durability, making them essential tools for professionals in aviation. Whether through passive sound isolation, active noise cancellation, or exceptional voice clarity, these headsets cater to the demands of pilots who prioritize safety and performance in their communications.