Manuals / Sennheiser / Home Audio / Headphones

Sennheiser HMEC 300 Product variants, HMEC 302 NoiseGard headset, HMEC 305 NoiseGard headset

Models: HMEC 306 HMEC 305-C HMEC 302 HMEC 305 HMEC 322 HMEC 400 HMDC 322 HMEC 300

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•Power supply for NoiseGard™ is provided via on-board power supply system, cigarette lighter socket or battery pack

•Fail safe operation in case of power failure

•Supply voltage for the NoiseGard™ system is processed by the in-line electronics in the connecting cable

•Made in Germany, two-year warranty

Product variants

HMEC 302 NoiseGard™ headset

The HMEC 302 differs from the HMEC 300 in the following features:

•Connection of microphone and NoiseGard™ electronics via PJ-068 plug

HMEC 305 NoiseGard™ headset

The HMEC 305 differs from the HMEC 300 in the following features:

•No Mono/Stereo switch

•Connection of headphones, microphone and NoiseGard™ electronics to the on-board power supply system (12–35 V DC) via XLR-5 plug

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Sennheiser HMEC 300, HMDC 322, HMEC 400 manual Product variants, HMEC 302 NoiseGard headset, HMEC 305 NoiseGard headset

Contents

Instructions for use HeadsetHMEC HMEC HMEC HMEC 305-C HMEC HMEC HMEC HMDC Contents Safety tips Safety tips HMEC 300 NoiseGard headset Headset featuresHMEC 305 NoiseGard headset Product variantsHMEC 302 NoiseGard headset HMEC 322 NoiseGard headset HMEC 305-CNoiseGard headsetHMEC 306 NoiseGard headset HMDC 322 NoiseGard headset HMEC 400 NoiseGard headsetDelivery includes HMEC 302, HMEC 305 and HMEC 306 headsetsReplaceable gel ear cushions Cat. No Recommended accessoriesConnecting cables for headsets Connecting the headsetsHMEC 300 and HMEC 400 headsets HMEC 302 headsetHMEC 305-Cheadset HMEC 322 and HMDC 322 headsetsHMEC 306 headset Connecting cable for HMEC 305-CPowering options HMEC 300 and HMEC 400 headsets 1. Connecting the headset to the on-boardsystemDanger of short circuit Headset HMEC 305-C Headset HMECHMEC 322 and HMDC 322 headsets HMEC 305 headsetInserting / replacing the the batteries LED operation and battery status indicationAttaching the battery pack to clothing Connecting the headset Adjusting the headband Preparing the headsets for useRelocating the microphone boom Positioning the microphoneTilt the microphone for final positioning 1.Pull the wind screen from the microphone Adjusting the volume Using the headsetsTurning NoiseGard on/off Exposure to loud sounds can cause hearing damageFolding up the headphones Adjusting the microphone gainMic Gain Adjustment Attaching the cable clipReplacing the ear cushions Spare partsReplacing the wind screen Replace the headband padding if it is damaged Replacing the headband paddingPut the new headband padding around the headband Join the fastening stripsPossible cause and what to do ProblemIn case of difficulty Possible cause and what to do ProblemThe NoiseGard principle Valuable information on NoiseGardPage The above diagram shows noise compensation with NoiseGard Passive hearing protectors effectively attenuate noise from the middle and upper frequency range, the effect decreasing sharply in the lower range. However, active noise compensation with NoiseGard combined with passive hearing protectors results in a reduction of noise of approx. 25 dB in the 25-500Hz frequency range. The total attenuation resulting from active and passive noise compensation is about 30 dB over the entire audio range Connector assignment Headphones Technical dataMicrophone incl. preamplifier HMECHMEC General dataHMEC HMECHMDC HMEC 305-CTechnical data HeadphonesHMEC 305-C HMECHMEC HMDCCertificate of Conformity