Sennheiser HD400 manual HMEC 400 NoiseGard headset, HMDC 322 NoiseGard headset

HMEC 400 NoiseGard™ headset

The HMEC 400 differs from the HMEC 300 in the following features:

•Stylish silver design

•Leatherette ear cushions

•Headband padding can be buttoned

HMDC 322 NoiseGard™ headset

The HMDC 322 differs from the HMEC 300 in the following features:

•No Mono/Stereo switch

•Coiled cable

•M-87/AIC dynamic microphone and low impedance headphones

•Connection of headphones and microphone via U-174/U jack plug to a low impedance interface in the helicopter

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