Sennheiser SH350 HMEC 355-CNoiseGard headset, HMEC 356 NoiseGard headset, No Mono/Stereo switch

HMEC 355-C NoiseGard™ headset

The HMEC 355-C differs from the HMEC 350 in the following features:

•No Mono/Stereo switch

•Connection of headphones and microphone via XLR-5 plug

•Connection of NoiseGard™ electronics via XLR-3 plug

HMEC 356 NoiseGard™ headset

The HMEC 356 differs from the HMEC 350 in the following features:

•Connection of headphones, microphone and NoiseGard™ electronics to the on-board power supply system (12–35 V DC) via 6-pin Redel plug

HMEC 372 NoiseGard™ headset

The HMEC 372 differs from the HMEC 350 in the following features:

•No Mono/Stereo switch

•Coiled cable

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

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